From f323a3e788ec932ddc1e31f44f3bd0c8a88f7dbc Mon Sep 17 00:00:00 2001
From: Jonathan <joe+github@pengubytes.de>
Date: Thu, 8 Feb 2024 03:52:43 +0100
Subject: [PATCH] [Python] deserialize enum json response (fix #17789) (#17791)

* deserialize enum json response (python)

* adapt python samples: adding enum deserialization

* add echo test for enum json response deserialization (python)

* update samples
---
 .../main/resources/python/api_client.mustache |  21 ++
 .../src/test/resources/3_0/echo_api.yaml      |  20 ++
 .../echo_api/csharp-restsharp/README.md       |   1 +
 .../csharp-restsharp/api/openapi.yaml         |  20 ++
 .../echo_api/csharp-restsharp/docs/BodyApi.md |  92 +++++
 .../src/Org.OpenAPITools/Api/BodyApi.cs       | 182 ++++++++++
 samples/client/echo_api/go/README.md          |   1 +
 samples/client/echo_api/go/api/openapi.yaml   |  20 ++
 samples/client/echo_api/go/api_body.go        | 108 ++++++
 samples/client/echo_api/go/docs/BodyAPI.md    |  67 ++++
 .../echo_api/java/apache-httpclient/README.md |   1 +
 .../java/apache-httpclient/api/openapi.yaml   |  22 ++
 .../java/apache-httpclient/docs/BodyApi.md    |  67 ++++
 .../org/openapitools/client/api/BodyApi.java  |  70 ++++
 .../echo_api/java/feign-gson/api/openapi.yaml |  22 ++
 .../org/openapitools/client/api/BodyApi.java  |  30 ++
 samples/client/echo_api/java/native/README.md |   2 +
 .../echo_api/java/native/api/openapi.yaml     |  22 ++
 .../echo_api/java/native/docs/BodyApi.md      | 136 ++++++++
 .../org/openapitools/client/api/BodyApi.java  |  74 ++++
 .../echo_api/java/okhttp-gson/README.md       |   1 +
 .../java/okhttp-gson/api/openapi.yaml         |  22 ++
 .../echo_api/java/okhttp-gson/docs/BodyApi.md |  63 ++++
 .../org/openapitools/client/api/BodyApi.java  | 119 +++++++
 .../client/echo_api/java/resteasy/README.md   |   1 +
 .../echo_api/java/resteasy/api/openapi.yaml   |  22 ++
 .../echo_api/java/resteasy/docs/BodyApi.md    |  67 ++++
 .../org/openapitools/client/api/BodyApi.java  |  39 +++
 .../echo_api/java/resttemplate/README.md      |   1 +
 .../java/resttemplate/api/openapi.yaml        |  22 ++
 .../java/resttemplate/docs/BodyApi.md         |  67 ++++
 .../org/openapitools/client/api/BodyApi.java  |  44 +++
 samples/client/echo_api/php-nextgen/README.md |   1 +
 .../echo_api/php-nextgen/docs/Api/BodyApi.md  |  57 ++++
 .../echo_api/php-nextgen/src/Api/BodyApi.php  | 318 ++++++++++++++++++
 samples/client/echo_api/powershell/README.md  |   1 +
 .../echo_api/powershell/docs/BodyApi.md       |  44 +++
 .../src/PSOpenAPITools/Api/BodyApi.ps1        |  74 ++++
 .../README.md                                 |   1 +
 .../docs/BodyApi.md                           |  69 ++++
 .../openapi_client/api/body_api.py            | 271 +++++++++++++++
 .../openapi_client/api_client.py              |  21 ++
 .../echo_api/python-pydantic-v1/README.md     |   1 +
 .../python-pydantic-v1/docs/BodyApi.md        |  68 ++++
 .../openapi_client/api/body_api.py            | 148 ++++++++
 samples/client/echo_api/python/README.md      |   1 +
 .../client/echo_api/python/docs/BodyApi.md    |  69 ++++
 .../python/openapi_client/api/body_api.py     | 271 +++++++++++++++
 .../python/openapi_client/api_client.py       |  21 ++
 .../echo_api/python/tests/test_manual.py      |   8 +
 samples/client/echo_api/r/R/body_api.R        | 126 +++++++
 samples/client/echo_api/r/README.md           |   1 +
 samples/client/echo_api/r/docs/BodyApi.md     |  48 +++
 .../client/echo_api/ruby-faraday/README.md    |   1 +
 .../echo_api/ruby-faraday/docs/BodyApi.md     |  67 ++++
 .../lib/openapi_client/api/body_api.rb        |  64 ++++
 samples/client/echo_api/ruby-httpx/README.md  |   1 +
 .../echo_api/ruby-httpx/docs/BodyApi.md       |  67 ++++
 .../lib/openapi_client/api/body_api.rb        |  64 ++++
 .../client/echo_api/ruby-typhoeus/README.md   |   1 +
 .../echo_api/ruby-typhoeus/docs/BodyApi.md    |  67 ++++
 .../lib/openapi_client/api/body_api.rb        |  64 ++++
 .../echo_api/typescript-axios/build/api.ts    |  69 ++++
 .../python-aiohttp/petstore_api/api_client.py |  21 ++
 .../python/petstore_api/api_client.py         |  21 ++
 65 files changed, 3572 insertions(+)

diff --git a/modules/openapi-generator/src/main/resources/python/api_client.mustache b/modules/openapi-generator/src/main/resources/python/api_client.mustache
index 758b0b76b10..c27b6b77564 100644
--- a/modules/openapi-generator/src/main/resources/python/api_client.mustache
+++ b/modules/openapi-generator/src/main/resources/python/api_client.mustache
@@ -4,6 +4,7 @@
 
 import datetime
 from dateutil.parser import parse
+from enum import Enum
 import json
 import mimetypes
 import os
@@ -437,6 +438,8 @@ class ApiClient:
             return self.__deserialize_date(data)
         elif klass == datetime.datetime:
             return self.__deserialize_datetime(data)
+        elif issubclass(klass, Enum):
+            return self.__deserialize_enum(data, klass)
         else:
             return self.__deserialize_model(data, klass)
 
@@ -743,6 +746,24 @@ class ApiClient:
                 )
             )
 
+    def __deserialize_enum(self, data, klass):
+        """Deserializes primitive type to enum.
+
+        :param data: primitive type.
+        :param klass: class literal.
+        :return: enum value.
+        """
+        try:
+            return klass(data)
+        except ValueError:
+            raise rest.ApiException(
+                status=0,
+                reason=(
+                    "Failed to parse `{0}` as `{1}`"
+                    .format(data, klass)
+                )
+            )
+
     def __deserialize_model(self, data, klass):
         """Deserializes list or dict to model.
 
diff --git a/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml b/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
index 1914feedf9f..206ec884287 100644
--- a/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
+++ b/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
@@ -544,6 +544,26 @@ paths:
             text/plain:
               schema:
                 type: string
+  /echo/body/string_enum:
+    post:
+      tags:
+        - body
+      summary: Test string enum response body
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
   /binary/gif:
     post:
       tags:
diff --git a/samples/client/echo_api/csharp-restsharp/README.md b/samples/client/echo_api/csharp-restsharp/README.md
index acc1f9339e4..dae03b193dc 100644
--- a/samples/client/echo_api/csharp-restsharp/README.md
+++ b/samples/client/echo_api/csharp-restsharp/README.md
@@ -126,6 +126,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**TestEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#testechobodyfreeformobjectresponsestring) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**TestEchoBodyPet**](docs/BodyApi.md#testechobodypet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**TestEchoBodyPetResponseString**](docs/BodyApi.md#testechobodypetresponsestring) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**TestEchoBodyStringEnum**](docs/BodyApi.md#testechobodystringenum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**TestEchoBodyTagResponseString**](docs/BodyApi.md#testechobodytagresponsestring) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**TestFormIntegerBooleanString**](docs/FormApi.md#testformintegerbooleanstring) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**TestFormOneof**](docs/FormApi.md#testformoneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/csharp-restsharp/api/openapi.yaml b/samples/client/echo_api/csharp-restsharp/api/openapi.yaml
index de3dcca0a45..95da606c823 100644
--- a/samples/client/echo_api/csharp-restsharp/api/openapi.yaml
+++ b/samples/client/echo_api/csharp-restsharp/api/openapi.yaml
@@ -519,6 +519,26 @@ paths:
       summary: Test free form object
       tags:
       - body
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/csharp-restsharp/docs/BodyApi.md b/samples/client/echo_api/csharp-restsharp/docs/BodyApi.md
index e1e031583b6..d7228b42444 100644
--- a/samples/client/echo_api/csharp-restsharp/docs/BodyApi.md
+++ b/samples/client/echo_api/csharp-restsharp/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**TestEchoBodyFreeFormObjectResponseString**](BodyApi.md#testechobodyfreeformobjectresponsestring) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**TestEchoBodyPet**](BodyApi.md#testechobodypet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**TestEchoBodyPetResponseString**](BodyApi.md#testechobodypetresponsestring) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**TestEchoBodyStringEnum**](BodyApi.md#testechobodystringenum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**TestEchoBodyTagResponseString**](BodyApi.md#testechobodytagresponsestring) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 <a id="testbinarygif"></a>
@@ -730,6 +731,97 @@ No authorization required
  - **Accept**: text/plain
 
 
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+<a id="testechobodystringenum"></a>
+# **TestEchoBodyStringEnum**
+> StringEnumRef TestEchoBodyStringEnum (string? body = null)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+```csharp
+using System.Collections.Generic;
+using System.Diagnostics;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+
+namespace Example
+{
+    public class TestEchoBodyStringEnumExample
+    {
+        public static void Main()
+        {
+            Configuration config = new Configuration();
+            config.BasePath = "http://localhost:3000";
+            var apiInstance = new BodyApi(config);
+            var body = null;  // string? | String enum (optional) 
+
+            try
+            {
+                // Test string enum response body
+                StringEnumRef result = apiInstance.TestEchoBodyStringEnum(body);
+                Debug.WriteLine(result);
+            }
+            catch (ApiException  e)
+            {
+                Debug.Print("Exception when calling BodyApi.TestEchoBodyStringEnum: " + e.Message);
+                Debug.Print("Status Code: " + e.ErrorCode);
+                Debug.Print(e.StackTrace);
+            }
+        }
+    }
+}
+```
+
+#### Using the TestEchoBodyStringEnumWithHttpInfo variant
+This returns an ApiResponse object which contains the response data, status code and headers.
+
+```csharp
+try
+{
+    // Test string enum response body
+    ApiResponse<StringEnumRef> response = apiInstance.TestEchoBodyStringEnumWithHttpInfo(body);
+    Debug.Write("Status Code: " + response.StatusCode);
+    Debug.Write("Response Headers: " + response.Headers);
+    Debug.Write("Response Body: " + response.Data);
+}
+catch (ApiException e)
+{
+    Debug.Print("Exception when calling BodyApi.TestEchoBodyStringEnumWithHttpInfo: " + e.Message);
+    Debug.Print("Status Code: " + e.ErrorCode);
+    Debug.Print(e.StackTrace);
+}
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+|------|------|-------------|-------|
+| **body** | **string?** | String enum | [optional]  |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+
 ### HTTP response details
 | Status code | Description | Response headers |
 |-------------|-------------|------------------|
diff --git a/samples/client/echo_api/csharp-restsharp/src/Org.OpenAPITools/Api/BodyApi.cs b/samples/client/echo_api/csharp-restsharp/src/Org.OpenAPITools/Api/BodyApi.cs
index 11c028a2e0c..89deceeb600 100644
--- a/samples/client/echo_api/csharp-restsharp/src/Org.OpenAPITools/Api/BodyApi.cs
+++ b/samples/client/echo_api/csharp-restsharp/src/Org.OpenAPITools/Api/BodyApi.cs
@@ -210,6 +210,29 @@ namespace Org.OpenAPITools.Api
         /// <returns>ApiResponse of string</returns>
         ApiResponse<string> TestEchoBodyPetResponseStringWithHttpInfo(Pet? pet = default(Pet?), int operationIndex = 0);
         /// <summary>
+        /// Test string enum response body
+        /// </summary>
+        /// <remarks>
+        /// Test string enum response body
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>StringEnumRef</returns>
+        StringEnumRef TestEchoBodyStringEnum(string? body = default(string?), int operationIndex = 0);
+
+        /// <summary>
+        /// Test string enum response body
+        /// </summary>
+        /// <remarks>
+        /// Test string enum response body
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>ApiResponse of StringEnumRef</returns>
+        ApiResponse<StringEnumRef> TestEchoBodyStringEnumWithHttpInfo(string? body = default(string?), int operationIndex = 0);
+        /// <summary>
         /// Test empty json (request body)
         /// </summary>
         /// <remarks>
@@ -440,6 +463,31 @@ namespace Org.OpenAPITools.Api
         /// <returns>Task of ApiResponse (string)</returns>
         System.Threading.Tasks.Task<ApiResponse<string>> TestEchoBodyPetResponseStringWithHttpInfoAsync(Pet? pet = default(Pet?), int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken));
         /// <summary>
+        /// Test string enum response body
+        /// </summary>
+        /// <remarks>
+        /// Test string enum response body
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of StringEnumRef</returns>
+        System.Threading.Tasks.Task<StringEnumRef> TestEchoBodyStringEnumAsync(string? body = default(string?), int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken));
+
+        /// <summary>
+        /// Test string enum response body
+        /// </summary>
+        /// <remarks>
+        /// Test string enum response body
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of ApiResponse (StringEnumRef)</returns>
+        System.Threading.Tasks.Task<ApiResponse<StringEnumRef>> TestEchoBodyStringEnumWithHttpInfoAsync(string? body = default(string?), int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken));
+        /// <summary>
         /// Test empty json (request body)
         /// </summary>
         /// <remarks>
@@ -1672,6 +1720,140 @@ namespace Org.OpenAPITools.Api
             return localVarResponse;
         }
 
+        /// <summary>
+        /// Test string enum response body Test string enum response body
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>StringEnumRef</returns>
+        public StringEnumRef TestEchoBodyStringEnum(string? body = default(string?), int operationIndex = 0)
+        {
+            Org.OpenAPITools.Client.ApiResponse<StringEnumRef> localVarResponse = TestEchoBodyStringEnumWithHttpInfo(body);
+            return localVarResponse.Data;
+        }
+
+        /// <summary>
+        /// Test string enum response body Test string enum response body
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>ApiResponse of StringEnumRef</returns>
+        public Org.OpenAPITools.Client.ApiResponse<StringEnumRef> TestEchoBodyStringEnumWithHttpInfo(string? body = default(string?), int operationIndex = 0)
+        {
+            Org.OpenAPITools.Client.RequestOptions localVarRequestOptions = new Org.OpenAPITools.Client.RequestOptions();
+
+            string[] _contentTypes = new string[] {
+                "application/json"
+            };
+
+            // to determine the Accept header
+            string[] _accepts = new string[] {
+                "application/json"
+            };
+
+            var localVarContentType = Org.OpenAPITools.Client.ClientUtils.SelectHeaderContentType(_contentTypes);
+            if (localVarContentType != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Content-Type", localVarContentType);
+            }
+
+            var localVarAccept = Org.OpenAPITools.Client.ClientUtils.SelectHeaderAccept(_accepts);
+            if (localVarAccept != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Accept", localVarAccept);
+            }
+
+            localVarRequestOptions.Data = body;
+
+            localVarRequestOptions.Operation = "BodyApi.TestEchoBodyStringEnum";
+            localVarRequestOptions.OperationIndex = operationIndex;
+
+
+            // make the HTTP request
+            var localVarResponse = this.Client.Post<StringEnumRef>("/echo/body/string_enum", localVarRequestOptions, this.Configuration);
+            if (this.ExceptionFactory != null)
+            {
+                Exception _exception = this.ExceptionFactory("TestEchoBodyStringEnum", localVarResponse);
+                if (_exception != null)
+                {
+                    throw _exception;
+                }
+            }
+
+            return localVarResponse;
+        }
+
+        /// <summary>
+        /// Test string enum response body Test string enum response body
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of StringEnumRef</returns>
+        public async System.Threading.Tasks.Task<StringEnumRef> TestEchoBodyStringEnumAsync(string? body = default(string?), int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken))
+        {
+            Org.OpenAPITools.Client.ApiResponse<StringEnumRef> localVarResponse = await TestEchoBodyStringEnumWithHttpInfoAsync(body, operationIndex, cancellationToken).ConfigureAwait(false);
+            return localVarResponse.Data;
+        }
+
+        /// <summary>
+        /// Test string enum response body Test string enum response body
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="body">String enum (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of ApiResponse (StringEnumRef)</returns>
+        public async System.Threading.Tasks.Task<Org.OpenAPITools.Client.ApiResponse<StringEnumRef>> TestEchoBodyStringEnumWithHttpInfoAsync(string? body = default(string?), int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken))
+        {
+
+            Org.OpenAPITools.Client.RequestOptions localVarRequestOptions = new Org.OpenAPITools.Client.RequestOptions();
+
+            string[] _contentTypes = new string[] {
+                "application/json"
+            };
+
+            // to determine the Accept header
+            string[] _accepts = new string[] {
+                "application/json"
+            };
+
+            var localVarContentType = Org.OpenAPITools.Client.ClientUtils.SelectHeaderContentType(_contentTypes);
+            if (localVarContentType != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Content-Type", localVarContentType);
+            }
+
+            var localVarAccept = Org.OpenAPITools.Client.ClientUtils.SelectHeaderAccept(_accepts);
+            if (localVarAccept != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Accept", localVarAccept);
+            }
+
+            localVarRequestOptions.Data = body;
+
+            localVarRequestOptions.Operation = "BodyApi.TestEchoBodyStringEnum";
+            localVarRequestOptions.OperationIndex = operationIndex;
+
+
+            // make the HTTP request
+            var localVarResponse = await this.AsynchronousClient.PostAsync<StringEnumRef>("/echo/body/string_enum", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
+
+            if (this.ExceptionFactory != null)
+            {
+                Exception _exception = this.ExceptionFactory("TestEchoBodyStringEnum", localVarResponse);
+                if (_exception != null)
+                {
+                    throw _exception;
+                }
+            }
+
+            return localVarResponse;
+        }
+
         /// <summary>
         /// Test empty json (request body) Test empty json (request body)
         /// </summary>
diff --git a/samples/client/echo_api/go/README.md b/samples/client/echo_api/go/README.md
index 8baafbcbe1e..0d0c1356401 100644
--- a/samples/client/echo_api/go/README.md
+++ b/samples/client/echo_api/go/README.md
@@ -87,6 +87,7 @@ Class | Method | HTTP request | Description
 *BodyAPI* | [**TestEchoBodyFreeFormObjectResponseString**](docs/BodyAPI.md#testechobodyfreeformobjectresponsestring) | **Post** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyAPI* | [**TestEchoBodyPet**](docs/BodyAPI.md#testechobodypet) | **Post** /echo/body/Pet | Test body parameter(s)
 *BodyAPI* | [**TestEchoBodyPetResponseString**](docs/BodyAPI.md#testechobodypetresponsestring) | **Post** /echo/body/Pet/response_string | Test empty response body
+*BodyAPI* | [**TestEchoBodyStringEnum**](docs/BodyAPI.md#testechobodystringenum) | **Post** /echo/body/string_enum | Test string enum response body
 *BodyAPI* | [**TestEchoBodyTagResponseString**](docs/BodyAPI.md#testechobodytagresponsestring) | **Post** /echo/body/Tag/response_string | Test empty json (request body)
 *FormAPI* | [**TestFormIntegerBooleanString**](docs/FormAPI.md#testformintegerbooleanstring) | **Post** /form/integer/boolean/string | Test form parameter(s)
 *FormAPI* | [**TestFormOneof**](docs/FormAPI.md#testformoneof) | **Post** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/go/api/openapi.yaml b/samples/client/echo_api/go/api/openapi.yaml
index 749b73a2d79..0a78af3993e 100644
--- a/samples/client/echo_api/go/api/openapi.yaml
+++ b/samples/client/echo_api/go/api/openapi.yaml
@@ -519,6 +519,26 @@ paths:
       summary: Test free form object
       tags:
       - body
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/go/api_body.go b/samples/client/echo_api/go/api_body.go
index 7c4f82522d7..0809e3c2a86 100644
--- a/samples/client/echo_api/go/api_body.go
+++ b/samples/client/echo_api/go/api_body.go
@@ -908,6 +908,114 @@ func (a *BodyAPIService) TestEchoBodyPetResponseStringExecute(r ApiTestEchoBodyP
 	return localVarReturnValue, localVarHTTPResponse, nil
 }
 
+type ApiTestEchoBodyStringEnumRequest struct {
+	ctx context.Context
+	ApiService *BodyAPIService
+	body *string
+}
+
+// String enum
+func (r ApiTestEchoBodyStringEnumRequest) Body(body string) ApiTestEchoBodyStringEnumRequest {
+	r.body = &body
+	return r
+}
+
+func (r ApiTestEchoBodyStringEnumRequest) Execute() (*StringEnumRef, *http.Response, error) {
+	return r.ApiService.TestEchoBodyStringEnumExecute(r)
+}
+
+/*
+TestEchoBodyStringEnum Test string enum response body
+
+Test string enum response body
+
+ @param ctx context.Context - for authentication, logging, cancellation, deadlines, tracing, etc. Passed from http.Request or context.Background().
+ @return ApiTestEchoBodyStringEnumRequest
+*/
+func (a *BodyAPIService) TestEchoBodyStringEnum(ctx context.Context) ApiTestEchoBodyStringEnumRequest {
+	return ApiTestEchoBodyStringEnumRequest{
+		ApiService: a,
+		ctx: ctx,
+	}
+}
+
+// Execute executes the request
+//  @return StringEnumRef
+func (a *BodyAPIService) TestEchoBodyStringEnumExecute(r ApiTestEchoBodyStringEnumRequest) (*StringEnumRef, *http.Response, error) {
+	var (
+		localVarHTTPMethod   = http.MethodPost
+		localVarPostBody     interface{}
+		formFiles            []formFile
+		localVarReturnValue  *StringEnumRef
+	)
+
+	localBasePath, err := a.client.cfg.ServerURLWithContext(r.ctx, "BodyAPIService.TestEchoBodyStringEnum")
+	if err != nil {
+		return localVarReturnValue, nil, &GenericOpenAPIError{error: err.Error()}
+	}
+
+	localVarPath := localBasePath + "/echo/body/string_enum"
+
+	localVarHeaderParams := make(map[string]string)
+	localVarQueryParams := url.Values{}
+	localVarFormParams := url.Values{}
+
+	// to determine the Content-Type header
+	localVarHTTPContentTypes := []string{"application/json"}
+
+	// set Content-Type header
+	localVarHTTPContentType := selectHeaderContentType(localVarHTTPContentTypes)
+	if localVarHTTPContentType != "" {
+		localVarHeaderParams["Content-Type"] = localVarHTTPContentType
+	}
+
+	// to determine the Accept header
+	localVarHTTPHeaderAccepts := []string{"application/json"}
+
+	// set Accept header
+	localVarHTTPHeaderAccept := selectHeaderAccept(localVarHTTPHeaderAccepts)
+	if localVarHTTPHeaderAccept != "" {
+		localVarHeaderParams["Accept"] = localVarHTTPHeaderAccept
+	}
+	// body params
+	localVarPostBody = r.body
+	req, err := a.client.prepareRequest(r.ctx, localVarPath, localVarHTTPMethod, localVarPostBody, localVarHeaderParams, localVarQueryParams, localVarFormParams, formFiles)
+	if err != nil {
+		return localVarReturnValue, nil, err
+	}
+
+	localVarHTTPResponse, err := a.client.callAPI(req)
+	if err != nil || localVarHTTPResponse == nil {
+		return localVarReturnValue, localVarHTTPResponse, err
+	}
+
+	localVarBody, err := io.ReadAll(localVarHTTPResponse.Body)
+	localVarHTTPResponse.Body.Close()
+	localVarHTTPResponse.Body = io.NopCloser(bytes.NewBuffer(localVarBody))
+	if err != nil {
+		return localVarReturnValue, localVarHTTPResponse, err
+	}
+
+	if localVarHTTPResponse.StatusCode >= 300 {
+		newErr := &GenericOpenAPIError{
+			body:  localVarBody,
+			error: localVarHTTPResponse.Status,
+		}
+		return localVarReturnValue, localVarHTTPResponse, newErr
+	}
+
+	err = a.client.decode(&localVarReturnValue, localVarBody, localVarHTTPResponse.Header.Get("Content-Type"))
+	if err != nil {
+		newErr := &GenericOpenAPIError{
+			body:  localVarBody,
+			error: err.Error(),
+		}
+		return localVarReturnValue, localVarHTTPResponse, newErr
+	}
+
+	return localVarReturnValue, localVarHTTPResponse, nil
+}
+
 type ApiTestEchoBodyTagResponseStringRequest struct {
 	ctx context.Context
 	ApiService *BodyAPIService
diff --git a/samples/client/echo_api/go/docs/BodyAPI.md b/samples/client/echo_api/go/docs/BodyAPI.md
index 7fafe50f258..32f3b1768d4 100644
--- a/samples/client/echo_api/go/docs/BodyAPI.md
+++ b/samples/client/echo_api/go/docs/BodyAPI.md
@@ -12,6 +12,7 @@ Method | HTTP request | Description
 [**TestEchoBodyFreeFormObjectResponseString**](BodyAPI.md#TestEchoBodyFreeFormObjectResponseString) | **Post** /echo/body/FreeFormObject/response_string | Test free form object
 [**TestEchoBodyPet**](BodyAPI.md#TestEchoBodyPet) | **Post** /echo/body/Pet | Test body parameter(s)
 [**TestEchoBodyPetResponseString**](BodyAPI.md#TestEchoBodyPetResponseString) | **Post** /echo/body/Pet/response_string | Test empty response body
+[**TestEchoBodyStringEnum**](BodyAPI.md#TestEchoBodyStringEnum) | **Post** /echo/body/string_enum | Test string enum response body
 [**TestEchoBodyTagResponseString**](BodyAPI.md#TestEchoBodyTagResponseString) | **Post** /echo/body/Tag/response_string | Test empty json (request body)
 
 
@@ -539,6 +540,72 @@ No authorization required
 [[Back to README]](../README.md)
 
 
+## TestEchoBodyStringEnum
+
+> StringEnumRef TestEchoBodyStringEnum(ctx).Body(body).Execute()
+
+Test string enum response body
+
+
+
+### Example
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	openapiclient "github.com/GIT_USER_ID/GIT_REPO_ID"
+)
+
+func main() {
+	body := string(987) // string | String enum (optional)
+
+	configuration := openapiclient.NewConfiguration()
+	apiClient := openapiclient.NewAPIClient(configuration)
+	resp, r, err := apiClient.BodyAPI.TestEchoBodyStringEnum(context.Background()).Body(body).Execute()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error when calling `BodyAPI.TestEchoBodyStringEnum``: %v\n", err)
+		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
+	}
+	// response from `TestEchoBodyStringEnum`: StringEnumRef
+	fmt.Fprintf(os.Stdout, "Response from `BodyAPI.TestEchoBodyStringEnum`: %v\n", resp)
+}
+```
+
+### Path Parameters
+
+
+
+### Other Parameters
+
+Other parameters are passed through a pointer to a apiTestEchoBodyStringEnumRequest struct via the builder pattern
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | **string** | String enum | 
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints)
+[[Back to Model list]](../README.md#documentation-for-models)
+[[Back to README]](../README.md)
+
+
 ## TestEchoBodyTagResponseString
 
 > string TestEchoBodyTagResponseString(ctx).Tag(tag).Execute()
diff --git a/samples/client/echo_api/java/apache-httpclient/README.md b/samples/client/echo_api/java/apache-httpclient/README.md
index a665e3e5cfa..4e8e1d22efd 100644
--- a/samples/client/echo_api/java/apache-httpclient/README.md
+++ b/samples/client/echo_api/java/apache-httpclient/README.md
@@ -120,6 +120,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**testEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**testEchoBodyStringEnum**](docs/BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**testEchoBodyTagResponseString**](docs/BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**testFormOneof**](docs/FormApi.md#testFormOneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml b/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml
index 770ca687d7f..fc7f3a92236 100644
--- a/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml
+++ b/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml
@@ -547,6 +547,28 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/java/apache-httpclient/docs/BodyApi.md b/samples/client/echo_api/java/apache-httpclient/docs/BodyApi.md
index 3cf2014e31f..06c7864137b 100644
--- a/samples/client/echo_api/java/apache-httpclient/docs/BodyApi.md
+++ b/samples/client/echo_api/java/apache-httpclient/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testEchoBodyFreeFormObjectResponseString**](BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**testEchoBodyStringEnum**](BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**testEchoBodyTagResponseString**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -540,6 +541,72 @@ No authorization required
 | **200** | Successful operation |  -  |
 
 
+## testEchoBodyStringEnum
+
+> StringEnumRef testEchoBodyStringEnum(body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        String body = "body_example"; // String | String enum
+        try {
+            StringEnumRef result = apiInstance.testEchoBodyStringEnum(body);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyStringEnum");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **body** | **String**| String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyTagResponseString
 
 > String testEchoBodyTagResponseString(tag)
diff --git a/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/BodyApi.java b/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/BodyApi.java
index 272b2b2ddfc..0bbc2619f67 100644
--- a/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/BodyApi.java
+++ b/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/BodyApi.java
@@ -21,6 +21,7 @@ import org.openapitools.client.Pair;
 
 import java.io.File;
 import org.openapitools.client.model.Pet;
+import org.openapitools.client.model.StringEnumRef;
 import org.openapitools.client.model.Tag;
 
 
@@ -612,6 +613,75 @@ public class BodyApi {
     );
   }
 
+  /**
+   * Test string enum response body
+   * Test string enum response body
+   * @param body String enum (optional)
+   * @return StringEnumRef
+   * @throws ApiException if fails to make API call
+   */
+  public StringEnumRef testEchoBodyStringEnum(String body) throws ApiException {
+    return this.testEchoBodyStringEnum(body, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test string enum response body
+   * Test string enum response body
+   * @param body String enum (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return StringEnumRef
+   * @throws ApiException if fails to make API call
+   */
+  public StringEnumRef testEchoBodyStringEnum(String body, Map<String, String> additionalHeaders) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // create path and map variables
+    String localVarPath = "/echo/body/string_enum";
+
+    StringJoiner localVarQueryStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    
+    localVarHeaderParams.putAll(additionalHeaders);
+
+    
+    
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<StringEnumRef> localVarReturnType = new TypeReference<StringEnumRef>() {};
+    return apiClient.invokeAPI(
+        localVarPath,
+        "POST",
+        localVarQueryParams,
+        localVarCollectionQueryParams,
+        localVarQueryStringJoiner.toString(),
+        localVarPostBody,
+        localVarHeaderParams,
+        localVarCookieParams,
+        localVarFormParams,
+        localVarAccept,
+        localVarContentType,
+        localVarAuthNames,
+        localVarReturnType
+    );
+  }
+
   /**
    * Test empty json (request body)
    * Test empty json (request body)
diff --git a/samples/client/echo_api/java/feign-gson/api/openapi.yaml b/samples/client/echo_api/java/feign-gson/api/openapi.yaml
index 770ca687d7f..fc7f3a92236 100644
--- a/samples/client/echo_api/java/feign-gson/api/openapi.yaml
+++ b/samples/client/echo_api/java/feign-gson/api/openapi.yaml
@@ -547,6 +547,28 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/BodyApi.java b/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/BodyApi.java
index 2b9bb7c413c..09cff764039 100644
--- a/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/BodyApi.java
+++ b/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/BodyApi.java
@@ -6,6 +6,7 @@ import org.openapitools.client.model.ApiResponse;
 
 import java.io.File;
 import org.openapitools.client.model.Pet;
+import org.openapitools.client.model.StringEnumRef;
 import org.openapitools.client.model.Tag;
 
 import java.util.ArrayList;
@@ -246,6 +247,35 @@ public interface BodyApi extends ApiClient.Api {
 
 
 
+  /**
+   * Test string enum response body
+   * Test string enum response body
+   * @param body String enum (optional)
+   * @return StringEnumRef
+   */
+  @RequestLine("POST /echo/body/string_enum")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: application/json",
+  })
+  StringEnumRef testEchoBodyStringEnum(String body);
+
+  /**
+   * Test string enum response body
+   * Similar to <code>testEchoBodyStringEnum</code> but it also returns the http response headers .
+   * Test string enum response body
+   * @param body String enum (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("POST /echo/body/string_enum")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: application/json",
+  })
+  ApiResponse<StringEnumRef> testEchoBodyStringEnumWithHttpInfo(String body);
+
+
+
   /**
    * Test empty json (request body)
    * Test empty json (request body)
diff --git a/samples/client/echo_api/java/native/README.md b/samples/client/echo_api/java/native/README.md
index 2f33a12f9fc..0c38fe7fe7c 100644
--- a/samples/client/echo_api/java/native/README.md
+++ b/samples/client/echo_api/java/native/README.md
@@ -124,6 +124,8 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**testEchoBodyPetWithHttpInfo**](docs/BodyApi.md#testEchoBodyPetWithHttpInfo) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
 *BodyApi* | [**testEchoBodyPetResponseStringWithHttpInfo**](docs/BodyApi.md#testEchoBodyPetResponseStringWithHttpInfo) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**testEchoBodyStringEnum**](docs/BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
+*BodyApi* | [**testEchoBodyStringEnumWithHttpInfo**](docs/BodyApi.md#testEchoBodyStringEnumWithHttpInfo) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**testEchoBodyTagResponseString**](docs/BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *BodyApi* | [**testEchoBodyTagResponseStringWithHttpInfo**](docs/BodyApi.md#testEchoBodyTagResponseStringWithHttpInfo) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
diff --git a/samples/client/echo_api/java/native/api/openapi.yaml b/samples/client/echo_api/java/native/api/openapi.yaml
index 770ca687d7f..fc7f3a92236 100644
--- a/samples/client/echo_api/java/native/api/openapi.yaml
+++ b/samples/client/echo_api/java/native/api/openapi.yaml
@@ -547,6 +547,28 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/java/native/docs/BodyApi.md b/samples/client/echo_api/java/native/docs/BodyApi.md
index 8e5f878bac0..222c1820104 100644
--- a/samples/client/echo_api/java/native/docs/BodyApi.md
+++ b/samples/client/echo_api/java/native/docs/BodyApi.md
@@ -20,6 +20,8 @@ All URIs are relative to *http://localhost:3000*
 | [**testEchoBodyPetWithHttpInfo**](BodyApi.md#testEchoBodyPetWithHttpInfo) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
 | [**testEchoBodyPetResponseStringWithHttpInfo**](BodyApi.md#testEchoBodyPetResponseStringWithHttpInfo) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**testEchoBodyStringEnum**](BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body |
+| [**testEchoBodyStringEnumWithHttpInfo**](BodyApi.md#testEchoBodyStringEnumWithHttpInfo) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**testEchoBodyTagResponseString**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 | [**testEchoBodyTagResponseStringWithHttpInfo**](BodyApi.md#testEchoBodyTagResponseStringWithHttpInfo) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
@@ -1089,6 +1091,140 @@ No authorization required
 | **200** | Successful operation |  -  |
 
 
+## testEchoBodyStringEnum
+
+> StringEnumRef testEchoBodyStringEnum(body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        String body = "body_example"; // String | String enum
+        try {
+            StringEnumRef result = apiInstance.testEchoBodyStringEnum(body);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyStringEnum");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **body** | **String**| String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testEchoBodyStringEnumWithHttpInfo
+
+> ApiResponse<StringEnumRef> testEchoBodyStringEnum testEchoBodyStringEnumWithHttpInfo(body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        String body = "body_example"; // String | String enum
+        try {
+            ApiResponse<StringEnumRef> response = apiInstance.testEchoBodyStringEnumWithHttpInfo(body);
+            System.out.println("Status code: " + response.getStatusCode());
+            System.out.println("Response headers: " + response.getHeaders());
+            System.out.println("Response body: " + response.getData());
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyStringEnum");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            System.err.println("Reason: " + e.getResponseBody());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **body** | **String**| String enum | [optional] |
+
+### Return type
+
+ApiResponse<[**StringEnumRef**](StringEnumRef.md)>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyTagResponseString
 
 > String testEchoBodyTagResponseString(tag)
diff --git a/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/BodyApi.java b/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/BodyApi.java
index 4807d5adb29..0878d8e94c4 100644
--- a/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/BodyApi.java
+++ b/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/BodyApi.java
@@ -19,6 +19,7 @@ import org.openapitools.client.Pair;
 
 import java.io.File;
 import org.openapitools.client.model.Pet;
+import org.openapitools.client.model.StringEnumRef;
 import org.openapitools.client.model.Tag;
 
 import com.fasterxml.jackson.core.type.TypeReference;
@@ -765,6 +766,79 @@ public class BodyApi {
     }
     return localVarRequestBuilder;
   }
+  /**
+   * Test string enum response body
+   * Test string enum response body
+   * @param body String enum (optional)
+   * @return StringEnumRef
+   * @throws ApiException if fails to make API call
+   */
+  public StringEnumRef testEchoBodyStringEnum(String body) throws ApiException {
+    ApiResponse<StringEnumRef> localVarResponse = testEchoBodyStringEnumWithHttpInfo(body);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test string enum response body
+   * Test string enum response body
+   * @param body String enum (optional)
+   * @return ApiResponse&lt;StringEnumRef&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<StringEnumRef> testEchoBodyStringEnumWithHttpInfo(String body) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testEchoBodyStringEnumRequestBuilder(body);
+    try {
+      HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofInputStream());
+      if (memberVarResponseInterceptor != null) {
+        memberVarResponseInterceptor.accept(localVarResponse);
+      }
+      try {
+        if (localVarResponse.statusCode()/ 100 != 2) {
+          throw getApiException("testEchoBodyStringEnum", localVarResponse);
+        }
+        return new ApiResponse<StringEnumRef>(
+          localVarResponse.statusCode(),
+          localVarResponse.headers().map(),
+          localVarResponse.body() == null ? null : memberVarObjectMapper.readValue(localVarResponse.body(), new TypeReference<StringEnumRef>() {}) // closes the InputStream
+        );
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testEchoBodyStringEnumRequestBuilder(String body) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/echo/body/string_enum";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Content-Type", "application/json");
+    localVarRequestBuilder.header("Accept", "application/json");
+
+    try {
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
   /**
    * Test empty json (request body)
    * Test empty json (request body)
diff --git a/samples/client/echo_api/java/okhttp-gson/README.md b/samples/client/echo_api/java/okhttp-gson/README.md
index e9f11220ea2..3dd092b3119 100644
--- a/samples/client/echo_api/java/okhttp-gson/README.md
+++ b/samples/client/echo_api/java/okhttp-gson/README.md
@@ -128,6 +128,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**testEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**testEchoBodyStringEnum**](docs/BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**testEchoBodyTagResponseString**](docs/BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**testFormOneof**](docs/FormApi.md#testFormOneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml b/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml
index 770ca687d7f..fc7f3a92236 100644
--- a/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml
+++ b/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml
@@ -547,6 +547,28 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/java/okhttp-gson/docs/BodyApi.md b/samples/client/echo_api/java/okhttp-gson/docs/BodyApi.md
index c5694eaaf2b..cdaa4dc6e1a 100644
--- a/samples/client/echo_api/java/okhttp-gson/docs/BodyApi.md
+++ b/samples/client/echo_api/java/okhttp-gson/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testEchoBodyFreeFormObjectResponseString**](BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**testEchoBodyStringEnum**](BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**testEchoBodyTagResponseString**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -507,6 +508,68 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+<a id="testEchoBodyStringEnum"></a>
+# **testEchoBodyStringEnum**
+> StringEnumRef testEchoBodyStringEnum(body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+  public static void main(String[] args) {
+    ApiClient defaultClient = Configuration.getDefaultApiClient();
+    defaultClient.setBasePath("http://localhost:3000");
+
+    BodyApi apiInstance = new BodyApi(defaultClient);
+    String body = "body_example"; // String | String enum
+    try {
+      StringEnumRef result = apiInstance.testEchoBodyStringEnum(body);
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling BodyApi#testEchoBodyStringEnum");
+      System.err.println("Status code: " + e.getCode());
+      System.err.println("Reason: " + e.getResponseBody());
+      System.err.println("Response headers: " + e.getResponseHeaders());
+      e.printStackTrace();
+    }
+  }
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **body** | **String**| String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
 <a id="testEchoBodyTagResponseString"></a>
 # **testEchoBodyTagResponseString**
 > String testEchoBodyTagResponseString(tag)
diff --git a/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/BodyApi.java b/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/BodyApi.java
index e344d508d10..19a2c37c467 100644
--- a/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/BodyApi.java
+++ b/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/BodyApi.java
@@ -29,6 +29,7 @@ import java.io.IOException;
 
 import java.io.File;
 import org.openapitools.client.model.Pet;
+import org.openapitools.client.model.StringEnumRef;
 import org.openapitools.client.model.Tag;
 
 import java.lang.reflect.Type;
@@ -1026,6 +1027,124 @@ public class BodyApi {
         localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
         return localVarCall;
     }
+    /**
+     * Build call for testEchoBodyStringEnum
+     * @param body String enum (optional)
+     * @param _callback Callback for upload/download progress
+     * @return Call to execute
+     * @throws ApiException If fail to serialize the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testEchoBodyStringEnumCall(String body, final ApiCallback _callback) throws ApiException {
+        String basePath = null;
+        // Operation Servers
+        String[] localBasePaths = new String[] {  };
+
+        // Determine Base Path to Use
+        if (localCustomBaseUrl != null){
+            basePath = localCustomBaseUrl;
+        } else if ( localBasePaths.length > 0 ) {
+            basePath = localBasePaths[localHostIndex];
+        } else {
+            basePath = null;
+        }
+
+        Object localVarPostBody = body;
+
+        // create path and map variables
+        String localVarPath = "/echo/body/string_enum";
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        Map<String, String> localVarCookieParams = new HashMap<String, String>();
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        final String[] localVarAccepts = {
+            "application/json"
+        };
+        final String localVarAccept = localVarApiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) {
+            localVarHeaderParams.put("Accept", localVarAccept);
+        }
+
+        final String[] localVarContentTypes = {
+            "application/json"
+        };
+        final String localVarContentType = localVarApiClient.selectHeaderContentType(localVarContentTypes);
+        if (localVarContentType != null) {
+            localVarHeaderParams.put("Content-Type", localVarContentType);
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return localVarApiClient.buildCall(basePath, localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAuthNames, _callback);
+    }
+
+    @SuppressWarnings("rawtypes")
+    private okhttp3.Call testEchoBodyStringEnumValidateBeforeCall(String body, final ApiCallback _callback) throws ApiException {
+        return testEchoBodyStringEnumCall(body, _callback);
+
+    }
+
+    /**
+     * Test string enum response body
+     * Test string enum response body
+     * @param body String enum (optional)
+     * @return StringEnumRef
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public StringEnumRef testEchoBodyStringEnum(String body) throws ApiException {
+        ApiResponse<StringEnumRef> localVarResp = testEchoBodyStringEnumWithHttpInfo(body);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test string enum response body
+     * Test string enum response body
+     * @param body String enum (optional)
+     * @return ApiResponse&lt;StringEnumRef&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public ApiResponse<StringEnumRef> testEchoBodyStringEnumWithHttpInfo(String body) throws ApiException {
+        okhttp3.Call localVarCall = testEchoBodyStringEnumValidateBeforeCall(body, null);
+        Type localVarReturnType = new TypeToken<StringEnumRef>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test string enum response body (asynchronously)
+     * Test string enum response body
+     * @param body String enum (optional)
+     * @param _callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testEchoBodyStringEnumAsync(String body, final ApiCallback<StringEnumRef> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testEchoBodyStringEnumValidateBeforeCall(body, _callback);
+        Type localVarReturnType = new TypeToken<StringEnumRef>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
     /**
      * Build call for testEchoBodyTagResponseString
      * @param tag Tag object (optional)
diff --git a/samples/client/echo_api/java/resteasy/README.md b/samples/client/echo_api/java/resteasy/README.md
index 4699843041d..59edc9b41c3 100644
--- a/samples/client/echo_api/java/resteasy/README.md
+++ b/samples/client/echo_api/java/resteasy/README.md
@@ -127,6 +127,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**testEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**testEchoBodyStringEnum**](docs/BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**testEchoBodyTagResponseString**](docs/BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**testFormOneof**](docs/FormApi.md#testFormOneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/java/resteasy/api/openapi.yaml b/samples/client/echo_api/java/resteasy/api/openapi.yaml
index 770ca687d7f..fc7f3a92236 100644
--- a/samples/client/echo_api/java/resteasy/api/openapi.yaml
+++ b/samples/client/echo_api/java/resteasy/api/openapi.yaml
@@ -547,6 +547,28 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/java/resteasy/docs/BodyApi.md b/samples/client/echo_api/java/resteasy/docs/BodyApi.md
index 3cf2014e31f..06c7864137b 100644
--- a/samples/client/echo_api/java/resteasy/docs/BodyApi.md
+++ b/samples/client/echo_api/java/resteasy/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testEchoBodyFreeFormObjectResponseString**](BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**testEchoBodyStringEnum**](BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**testEchoBodyTagResponseString**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -540,6 +541,72 @@ No authorization required
 | **200** | Successful operation |  -  |
 
 
+## testEchoBodyStringEnum
+
+> StringEnumRef testEchoBodyStringEnum(body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        String body = "body_example"; // String | String enum
+        try {
+            StringEnumRef result = apiInstance.testEchoBodyStringEnum(body);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyStringEnum");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **body** | **String**| String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyTagResponseString
 
 > String testEchoBodyTagResponseString(tag)
diff --git a/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/BodyApi.java b/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/BodyApi.java
index fde7ad5e99c..8a17fe96677 100644
--- a/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/BodyApi.java
+++ b/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/BodyApi.java
@@ -9,6 +9,7 @@ import javax.ws.rs.core.GenericType;
 
 import java.io.File;
 import org.openapitools.client.model.Pet;
+import org.openapitools.client.model.StringEnumRef;
 import org.openapitools.client.model.Tag;
 
 import java.util.ArrayList;
@@ -348,6 +349,44 @@ public class BodyApi {
     GenericType<String> localVarReturnType = new GenericType<String>() {};
     return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
       }
+  /**
+   * Test string enum response body
+   * Test string enum response body
+   * @param body String enum (optional)
+   * @return a {@code StringEnumRef}
+   * @throws ApiException if fails to make API call
+   */
+  public StringEnumRef testEchoBodyStringEnum(String body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // create path and map variables
+    String localVarPath = "/echo/body/string_enum".replaceAll("\\{format\\}","json");
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<StringEnumRef> localVarReturnType = new GenericType<StringEnumRef>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
   /**
    * Test empty json (request body)
    * Test empty json (request body)
diff --git a/samples/client/echo_api/java/resttemplate/README.md b/samples/client/echo_api/java/resttemplate/README.md
index 09190155c42..df4b2e8d562 100644
--- a/samples/client/echo_api/java/resttemplate/README.md
+++ b/samples/client/echo_api/java/resttemplate/README.md
@@ -127,6 +127,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**testEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**testEchoBodyStringEnum**](docs/BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**testEchoBodyTagResponseString**](docs/BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**testFormOneof**](docs/FormApi.md#testFormOneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/java/resttemplate/api/openapi.yaml b/samples/client/echo_api/java/resttemplate/api/openapi.yaml
index 770ca687d7f..fc7f3a92236 100644
--- a/samples/client/echo_api/java/resttemplate/api/openapi.yaml
+++ b/samples/client/echo_api/java/resttemplate/api/openapi.yaml
@@ -547,6 +547,28 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
diff --git a/samples/client/echo_api/java/resttemplate/docs/BodyApi.md b/samples/client/echo_api/java/resttemplate/docs/BodyApi.md
index 3cf2014e31f..06c7864137b 100644
--- a/samples/client/echo_api/java/resttemplate/docs/BodyApi.md
+++ b/samples/client/echo_api/java/resttemplate/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testEchoBodyFreeFormObjectResponseString**](BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**testEchoBodyStringEnum**](BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**testEchoBodyTagResponseString**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -540,6 +541,72 @@ No authorization required
 | **200** | Successful operation |  -  |
 
 
+## testEchoBodyStringEnum
+
+> StringEnumRef testEchoBodyStringEnum(body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        String body = "body_example"; // String | String enum
+        try {
+            StringEnumRef result = apiInstance.testEchoBodyStringEnum(body);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyStringEnum");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **body** | **String**| String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyTagResponseString
 
 > String testEchoBodyTagResponseString(tag)
diff --git a/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/BodyApi.java b/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/BodyApi.java
index 572f8586b5c..d55defa1e43 100644
--- a/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/BodyApi.java
+++ b/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/BodyApi.java
@@ -4,6 +4,7 @@ import org.openapitools.client.ApiClient;
 
 import java.io.File;
 import org.openapitools.client.model.Pet;
+import org.openapitools.client.model.StringEnumRef;
 import org.openapitools.client.model.Tag;
 
 import java.util.Collections;
@@ -398,6 +399,49 @@ public class BodyApi {
         ParameterizedTypeReference<String> localReturnType = new ParameterizedTypeReference<String>() {};
         return apiClient.invokeAPI("/echo/body/Pet/response_string", HttpMethod.POST, Collections.<String, Object>emptyMap(), localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localReturnType);
     }
+    /**
+     * Test string enum response body
+     * Test string enum response body
+     * <p><b>200</b> - Successful operation
+     * @param body String enum (optional)
+     * @return StringEnumRef
+     * @throws RestClientException if an error occurs while attempting to invoke the API
+     */
+    public StringEnumRef testEchoBodyStringEnum(String body) throws RestClientException {
+        return testEchoBodyStringEnumWithHttpInfo(body).getBody();
+    }
+
+    /**
+     * Test string enum response body
+     * Test string enum response body
+     * <p><b>200</b> - Successful operation
+     * @param body String enum (optional)
+     * @return ResponseEntity&lt;StringEnumRef&gt;
+     * @throws RestClientException if an error occurs while attempting to invoke the API
+     */
+    public ResponseEntity<StringEnumRef> testEchoBodyStringEnumWithHttpInfo(String body) throws RestClientException {
+        Object localVarPostBody = body;
+        
+
+        final MultiValueMap<String, String> localVarQueryParams = new LinkedMultiValueMap<String, String>();
+        final HttpHeaders localVarHeaderParams = new HttpHeaders();
+        final MultiValueMap<String, String> localVarCookieParams = new LinkedMultiValueMap<String, String>();
+        final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
+
+        final String[] localVarAccepts = { 
+            "application/json"
+         };
+        final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        final String[] localVarContentTypes = { 
+            "application/json"
+         };
+        final MediaType localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+        String[] localVarAuthNames = new String[] {  };
+
+        ParameterizedTypeReference<StringEnumRef> localReturnType = new ParameterizedTypeReference<StringEnumRef>() {};
+        return apiClient.invokeAPI("/echo/body/string_enum", HttpMethod.POST, Collections.<String, Object>emptyMap(), localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localReturnType);
+    }
     /**
      * Test empty json (request body)
      * Test empty json (request body)
diff --git a/samples/client/echo_api/php-nextgen/README.md b/samples/client/echo_api/php-nextgen/README.md
index 1477dddf6f6..c9411c5f752 100644
--- a/samples/client/echo_api/php-nextgen/README.md
+++ b/samples/client/echo_api/php-nextgen/README.md
@@ -86,6 +86,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**testEchoBodyFreeFormObjectResponseString**](docs/Api/BodyApi.md#testechobodyfreeformobjectresponsestring) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**testEchoBodyPet**](docs/Api/BodyApi.md#testechobodypet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/Api/BodyApi.md#testechobodypetresponsestring) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**testEchoBodyStringEnum**](docs/Api/BodyApi.md#testechobodystringenum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**testEchoBodyTagResponseString**](docs/Api/BodyApi.md#testechobodytagresponsestring) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**testFormIntegerBooleanString**](docs/Api/FormApi.md#testformintegerbooleanstring) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**testFormOneof**](docs/Api/FormApi.md#testformoneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/php-nextgen/docs/Api/BodyApi.md b/samples/client/echo_api/php-nextgen/docs/Api/BodyApi.md
index cb2845fd730..f9b966860b7 100644
--- a/samples/client/echo_api/php-nextgen/docs/Api/BodyApi.md
+++ b/samples/client/echo_api/php-nextgen/docs/Api/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to http://localhost:3000, except if the operation defines
 | [**testEchoBodyFreeFormObjectResponseString()**](BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**testEchoBodyPet()**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString()**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**testEchoBodyStringEnum()**](BodyApi.md#testEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**testEchoBodyTagResponseString()**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -460,6 +461,62 @@ No authorization required
 [[Back to Model list]](../../README.md#models)
 [[Back to README]](../../README.md)
 
+## `testEchoBodyStringEnum()`
+
+```php
+testEchoBodyStringEnum($body): \OpenAPI\Client\Model\StringEnumRef
+```
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+```php
+<?php
+require_once(__DIR__ . '/vendor/autoload.php');
+
+
+
+$apiInstance = new OpenAPI\Client\Api\BodyApi(
+    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
+    // This is optional, `GuzzleHttp\Client` will be used as default.
+    new GuzzleHttp\Client()
+);
+$body = 'body_example'; // string | String enum
+
+try {
+    $result = $apiInstance->testEchoBodyStringEnum($body);
+    print_r($result);
+} catch (Exception $e) {
+    echo 'Exception when calling BodyApi->testEchoBodyStringEnum: ', $e->getMessage(), PHP_EOL;
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+| ------------- | ------------- | ------------- | ------------- |
+| **body** | **string**| String enum | [optional] |
+
+### Return type
+
+[**\OpenAPI\Client\Model\StringEnumRef**](../Model/StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: `application/json`
+- **Accept**: `application/json`
+
+[[Back to top]](#) [[Back to API list]](../../README.md#endpoints)
+[[Back to Model list]](../../README.md#models)
+[[Back to README]](../../README.md)
+
 ## `testEchoBodyTagResponseString()`
 
 ```php
diff --git a/samples/client/echo_api/php-nextgen/src/Api/BodyApi.php b/samples/client/echo_api/php-nextgen/src/Api/BodyApi.php
index e7ec741d331..b8a886ce3ab 100644
--- a/samples/client/echo_api/php-nextgen/src/Api/BodyApi.php
+++ b/samples/client/echo_api/php-nextgen/src/Api/BodyApi.php
@@ -96,6 +96,9 @@ class BodyApi
         'testEchoBodyPetResponseString' => [
             'application/json',
         ],
+        'testEchoBodyStringEnum' => [
+            'application/json',
+        ],
         'testEchoBodyTagResponseString' => [
             'application/json',
         ],
@@ -2665,6 +2668,321 @@ class BodyApi
         );
     }
 
+    /**
+     * Operation testEchoBodyStringEnum
+     *
+     * Test string enum response body
+     *
+     * @param  string|null $body String enum (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testEchoBodyStringEnum'] to see the possible values for this operation
+     *
+     * @throws ApiException on non-2xx response or if the response body is not in the expected format
+     * @throws InvalidArgumentException
+     * @return \OpenAPI\Client\Model\StringEnumRef
+     */
+    public function testEchoBodyStringEnum(
+        ?string $body = null,
+        string $contentType = self::contentTypes['testEchoBodyStringEnum'][0]
+    ): \OpenAPI\Client\Model\StringEnumRef
+    {
+        list($response) = $this->testEchoBodyStringEnumWithHttpInfo($body, $contentType);
+        return $response;
+    }
+
+    /**
+     * Operation testEchoBodyStringEnumWithHttpInfo
+     *
+     * Test string enum response body
+     *
+     * @param  string|null $body String enum (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testEchoBodyStringEnum'] to see the possible values for this operation
+     *
+     * @throws ApiException on non-2xx response or if the response body is not in the expected format
+     * @throws InvalidArgumentException
+     * @return array of \OpenAPI\Client\Model\StringEnumRef, HTTP status code, HTTP response headers (array of strings)
+     */
+    public function testEchoBodyStringEnumWithHttpInfo(
+        ?string $body = null,
+        string $contentType = self::contentTypes['testEchoBodyStringEnum'][0]
+    ): array
+    {
+        $request = $this->testEchoBodyStringEnumRequest($body, $contentType);
+
+        try {
+            $options = $this->createHttpClientOption();
+            try {
+                $response = $this->client->send($request, $options);
+            } catch (RequestException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
+                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
+                );
+            } catch (ConnectException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    null,
+                    null
+                );
+            }
+
+            $statusCode = $response->getStatusCode();
+
+            if ($statusCode < 200 || $statusCode > 299) {
+                throw new ApiException(
+                    sprintf(
+                        '[%d] Error connecting to the API (%s)',
+                        $statusCode,
+                        (string) $request->getUri()
+                    ),
+                    $statusCode,
+                    $response->getHeaders(),
+                    (string) $response->getBody()
+                );
+            }
+
+            switch($statusCode) {
+                case 200:
+                    if ('\OpenAPI\Client\Model\StringEnumRef' === '\SplFileObject') {
+                        $content = $response->getBody(); //stream goes to serializer
+                    } else {
+                        $content = (string) $response->getBody();
+                        if ('\OpenAPI\Client\Model\StringEnumRef' !== 'string') {
+                            try {
+                                $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
+                            } catch (\JsonException $exception) {
+                                throw new ApiException(
+                                    sprintf(
+                                        'Error JSON decoding server response (%s)',
+                                        $request->getUri()
+                                    ),
+                                    $statusCode,
+                                    $response->getHeaders(),
+                                    $content
+                                );
+                            }
+                        }
+                    }
+
+                    return [
+                        ObjectSerializer::deserialize($content, '\OpenAPI\Client\Model\StringEnumRef', []),
+                        $response->getStatusCode(),
+                        $response->getHeaders()
+                    ];
+            }
+
+            $returnType = '\OpenAPI\Client\Model\StringEnumRef';
+            if ($returnType === '\SplFileObject') {
+                $content = $response->getBody(); //stream goes to serializer
+            } else {
+                $content = (string) $response->getBody();
+                if ($returnType !== 'string') {
+                    try {
+                        $content = json_decode($content, false, 512, JSON_THROW_ON_ERROR);
+                    } catch (\JsonException $exception) {
+                        throw new ApiException(
+                            sprintf(
+                                'Error JSON decoding server response (%s)',
+                                $request->getUri()
+                            ),
+                            $statusCode,
+                            $response->getHeaders(),
+                            $content
+                        );
+                    }
+                }
+            }
+
+            return [
+                ObjectSerializer::deserialize($content, $returnType, []),
+                $response->getStatusCode(),
+                $response->getHeaders()
+            ];
+
+        } catch (ApiException $e) {
+            switch ($e->getCode()) {
+                case 200:
+                    $data = ObjectSerializer::deserialize(
+                        $e->getResponseBody(),
+                        '\OpenAPI\Client\Model\StringEnumRef',
+                        $e->getResponseHeaders()
+                    );
+                    $e->setResponseObject($data);
+                    break;
+            }
+            throw $e;
+        }
+    }
+
+    /**
+     * Operation testEchoBodyStringEnumAsync
+     *
+     * Test string enum response body
+     *
+     * @param  string|null $body String enum (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testEchoBodyStringEnum'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return PromiseInterface
+     */
+    public function testEchoBodyStringEnumAsync(
+        ?string $body = null,
+        string $contentType = self::contentTypes['testEchoBodyStringEnum'][0]
+    ): PromiseInterface
+    {
+        return $this->testEchoBodyStringEnumAsyncWithHttpInfo($body, $contentType)
+            ->then(
+                function ($response) {
+                    return $response[0];
+                }
+            );
+    }
+
+    /**
+     * Operation testEchoBodyStringEnumAsyncWithHttpInfo
+     *
+     * Test string enum response body
+     *
+     * @param  string|null $body String enum (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testEchoBodyStringEnum'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return PromiseInterface
+     */
+    public function testEchoBodyStringEnumAsyncWithHttpInfo(
+        $body = null,
+        string $contentType = self::contentTypes['testEchoBodyStringEnum'][0]
+    ): PromiseInterface
+    {
+        $returnType = '\OpenAPI\Client\Model\StringEnumRef';
+        $request = $this->testEchoBodyStringEnumRequest($body, $contentType);
+
+        return $this->client
+            ->sendAsync($request, $this->createHttpClientOption())
+            ->then(
+                function ($response) use ($returnType) {
+                    if ($returnType === '\SplFileObject') {
+                        $content = $response->getBody(); //stream goes to serializer
+                    } else {
+                        $content = (string) $response->getBody();
+                        if ($returnType !== 'string') {
+                            $content = json_decode($content);
+                        }
+                    }
+
+                    return [
+                        ObjectSerializer::deserialize($content, $returnType, []),
+                        $response->getStatusCode(),
+                        $response->getHeaders()
+                    ];
+                },
+                function ($exception) {
+                    $response = $exception->getResponse();
+                    $statusCode = $response->getStatusCode();
+                    throw new ApiException(
+                        sprintf(
+                            '[%d] Error connecting to the API (%s)',
+                            $statusCode,
+                            $exception->getRequest()->getUri()
+                        ),
+                        $statusCode,
+                        $response->getHeaders(),
+                        (string) $response->getBody()
+                    );
+                }
+            );
+    }
+
+    /**
+     * Create request for operation 'testEchoBodyStringEnum'
+     *
+     * @param  string|null $body String enum (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testEchoBodyStringEnum'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return \GuzzleHttp\Psr7\Request
+     */
+    public function testEchoBodyStringEnumRequest(
+        $body = null,
+        string $contentType = self::contentTypes['testEchoBodyStringEnum'][0]
+    ): Request
+    {
+
+
+
+        $resourcePath = '/echo/body/string_enum';
+        $formParams = [];
+        $queryParams = [];
+        $headerParams = [];
+        $httpBody = '';
+        $multipart = false;
+
+
+
+
+
+        $headers = $this->headerSelector->selectHeaders(
+            ['application/json', ],
+            $contentType,
+            $multipart
+        );
+
+        // for model (json/xml)
+        if (isset($body)) {
+            if (stripos($headers['Content-Type'], 'application/json') !== false) {
+                # if Content-Type contains "application/json", json_encode the body
+                $httpBody = \GuzzleHttp\Utils::jsonEncode(ObjectSerializer::sanitizeForSerialization($body));
+            } else {
+                $httpBody = $body;
+            }
+        } elseif (count($formParams) > 0) {
+            if ($multipart) {
+                $multipartContents = [];
+                foreach ($formParams as $formParamName => $formParamValue) {
+                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
+                    foreach ($formParamValueItems as $formParamValueItem) {
+                        $multipartContents[] = [
+                            'name' => $formParamName,
+                            'contents' => $formParamValueItem
+                        ];
+                    }
+                }
+                // for HTTP post (form)
+                $httpBody = new MultipartStream($multipartContents);
+
+            } elseif (stripos($headers['Content-Type'], 'application/json') !== false) {
+                # if Content-Type contains "application/json", json_encode the form parameters
+                $httpBody = \GuzzleHttp\Utils::jsonEncode($formParams);
+            } else {
+                // for HTTP post (form)
+                $httpBody = ObjectSerializer::buildQuery($formParams);
+            }
+        }
+
+
+        $defaultHeaders = [];
+        if ($this->config->getUserAgent()) {
+            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
+        }
+
+        $headers = array_merge(
+            $defaultHeaders,
+            $headerParams,
+            $headers
+        );
+
+        $operationHost = $this->config->getHost();
+        $query = ObjectSerializer::buildQuery($queryParams);
+        return new Request(
+            'POST',
+            $operationHost . $resourcePath . ($query ? "?{$query}" : ''),
+            $headers,
+            $httpBody
+        );
+    }
+
     /**
      * Operation testEchoBodyTagResponseString
      *
diff --git a/samples/client/echo_api/powershell/README.md b/samples/client/echo_api/powershell/README.md
index fd5edce4e27..7e4b3616a80 100644
--- a/samples/client/echo_api/powershell/README.md
+++ b/samples/client/echo_api/powershell/README.md
@@ -62,6 +62,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**Test-EchoBodyPetResponseString**](docs/BodyApi.md#Test-EchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
 *BodyApi* | [**Test-EchoBodyTagResponseString**](docs/BodyApi.md#Test-EchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *BodyApi* | [**Test-EchoBodyAllOfPet**](docs/BodyApi.md#Test-EchoBodyAllOfPet) | **POST** /echo/body/allOf/Pet | Test body parameter(s)
+*BodyApi* | [**Test-EchoBodyStringEnum**](docs/BodyApi.md#Test-EchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 *FormApi* | [**Test-FormIntegerBooleanString**](docs/FormApi.md#Test-FormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**Test-FormOneof**](docs/FormApi.md#Test-FormOneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
 *HeaderApi* | [**Test-HeaderIntegerBooleanStringEnums**](docs/HeaderApi.md#Test-HeaderIntegerBooleanStringEnums) | **GET** /header/integer/boolean/string/enums | Test header parameter(s)
diff --git a/samples/client/echo_api/powershell/docs/BodyApi.md b/samples/client/echo_api/powershell/docs/BodyApi.md
index 9302de3186f..902fc4f3588 100644
--- a/samples/client/echo_api/powershell/docs/BodyApi.md
+++ b/samples/client/echo_api/powershell/docs/BodyApi.md
@@ -13,6 +13,7 @@ Method | HTTP request | Description
 [**Test-EchoBodyPetResponseString**](BodyApi.md#Test-EchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
 [**Test-EchoBodyTagResponseString**](BodyApi.md#Test-EchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 [**Test-EchoBodyAllOfPet**](BodyApi.md#Test-EchoBodyAllOfPet) | **POST** /echo/body/allOf/Pet | Test body parameter(s)
+[**Test-EchoBodyStringEnum**](BodyApi.md#Test-EchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 
 
 <a id="Test-BinaryGif"></a>
@@ -403,3 +404,46 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+<a id="Test-EchoBodyStringEnum"></a>
+# **Test-EchoBodyStringEnum**
+> StringEnumRef Test-EchoBodyStringEnum<br>
+> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[-Body] <System.Nullable[String]><br>
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+```powershell
+$Body = 0 # String | String enum (optional)
+
+# Test string enum response body
+try {
+    $Result = Test-EchoBodyStringEnum -Body $Body
+} catch {
+    Write-Host ("Exception occurred when calling Test-EchoBodyStringEnum: {0}" -f ($_.ErrorDetails | ConvertFrom-Json))
+    Write-Host ("Response headers: {0}" -f ($_.Exception.Response.Headers | ConvertTo-Json))
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **Body** | **String**| String enum | [optional] 
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md) (PSCustomObject)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/BodyApi.ps1 b/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/BodyApi.ps1
index dbd9ab87992..a786a64a60e 100644
--- a/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/BodyApi.ps1
+++ b/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/BodyApi.ps1
@@ -666,3 +666,77 @@ function Test-EchoBodyAllOfPet {
     }
 }
 
+<#
+.SYNOPSIS
+
+Test string enum response body
+
+.DESCRIPTION
+
+No description available.
+
+.PARAMETER Body
+String enum
+
+.PARAMETER WithHttpInfo
+
+A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
+
+.OUTPUTS
+
+StringEnumRef
+#>
+function Test-EchoBodyStringEnum {
+    [CmdletBinding()]
+    Param (
+        [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
+        [System.Nullable[String]]
+        ${Body},
+        [Switch]
+        $WithHttpInfo
+    )
+
+    Process {
+        'Calling method: Test-EchoBodyStringEnum' | Write-Debug
+        $PSBoundParameters | Out-DebugParameter | Write-Debug
+
+        $LocalVarAccepts = @()
+        $LocalVarContentTypes = @()
+        $LocalVarQueryParameters = @{}
+        $LocalVarHeaderParameters = @{}
+        $LocalVarFormParameters = @{}
+        $LocalVarPathParameters = @{}
+        $LocalVarCookieParameters = @{}
+        $LocalVarBodyParameter = $null
+
+        $Configuration = Get-Configuration
+        # HTTP header 'Accept' (if needed)
+        $LocalVarAccepts = @('application/json')
+
+        # HTTP header 'Content-Type'
+        $LocalVarContentTypes = @('application/json')
+
+        $LocalVarUri = '/echo/body/string_enum'
+
+        $LocalVarBodyParameter = $Body | ConvertTo-Json -Depth 100
+
+        $LocalVarResult = Invoke-ApiClient -Method 'POST' `
+                                -Uri $LocalVarUri `
+                                -Accepts $LocalVarAccepts `
+                                -ContentTypes $LocalVarContentTypes `
+                                -Body $LocalVarBodyParameter `
+                                -HeaderParameters $LocalVarHeaderParameters `
+                                -QueryParameters $LocalVarQueryParameters `
+                                -FormParameters $LocalVarFormParameters `
+                                -CookieParameters $LocalVarCookieParameters `
+                                -ReturnType "StringEnumRef" `
+                                -IsBodyNullable $false
+
+        if ($WithHttpInfo.IsPresent) {
+            return $LocalVarResult
+        } else {
+            return $LocalVarResult["Response"]
+        }
+    }
+}
+
diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md
index 6140414aa42..823e6c517cd 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md
@@ -103,6 +103,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**test_echo_body_free_form_object_response_string**](docs/BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**test_echo_body_pet**](docs/BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**test_echo_body_pet_response_string**](docs/BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**test_echo_body_string_enum**](docs/BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**test_echo_body_tag_response_string**](docs/BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**test_form_integer_boolean_string**](docs/FormApi.md#test_form_integer_boolean_string) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**test_form_oneof**](docs/FormApi.md#test_form_oneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/BodyApi.md b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/BodyApi.md
index acfbe28268d..d4cc6d4dab6 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/BodyApi.md
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/BodyApi.md
@@ -12,6 +12,7 @@ Method | HTTP request | Description
 [**test_echo_body_free_form_object_response_string**](BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 [**test_echo_body_pet**](BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 [**test_echo_body_pet_response_string**](BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+[**test_echo_body_string_enum**](BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 [**test_echo_body_tag_response_string**](BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 
 
@@ -550,6 +551,74 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **test_echo_body_string_enum**
+> StringEnumRef test_echo_body_string_enum(body=body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+
+```python
+import openapi_client
+from openapi_client.models.string_enum_ref import StringEnumRef
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.BodyApi(api_client)
+    body = 'body_example' # str | String enum (optional)
+
+    try:
+        # Test string enum response body
+        api_response = api_instance.test_echo_body_string_enum(body=body)
+        print("The response of BodyApi->test_echo_body_string_enum:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling BodyApi->test_echo_body_string_enum: %s\n" % e)
+```
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | **str**| String enum | [optional] 
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+### HTTP response details
+
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
 # **test_echo_body_tag_response_string**
 > str test_echo_body_tag_response_string(tag=tag)
 
diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/body_api.py b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/body_api.py
index d9c2d64bea2..dfb53f26d44 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/body_api.py
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/body_api.py
@@ -21,6 +21,7 @@ from pydantic import Field, StrictBytes, StrictStr
 from typing import Any, Dict, List, Optional, Union
 from typing_extensions import Annotated
 from openapi_client.models.pet import Pet
+from openapi_client.models.string_enum_ref import StringEnumRef
 from openapi_client.models.tag import Tag
 
 from openapi_client.api_client import ApiClient, RequestSerialized
@@ -2179,6 +2180,276 @@ class BodyApi:
 
 
 
+    @validate_call
+    def test_echo_body_string_enum(
+        self,
+        body: Annotated[Optional[StringEnumRef], Field(description="String enum")] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> StringEnumRef:
+        """Test string enum response body
+
+        Test string enum response body
+
+        :param body: String enum
+        :type body: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_echo_body_string_enum_serialize(
+            body=body,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "StringEnumRef",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        ).data
+
+
+    @validate_call
+    def test_echo_body_string_enum_with_http_info(
+        self,
+        body: Annotated[Optional[StringEnumRef], Field(description="String enum")] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> ApiResponse[StringEnumRef]:
+        """Test string enum response body
+
+        Test string enum response body
+
+        :param body: String enum
+        :type body: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_echo_body_string_enum_serialize(
+            body=body,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "StringEnumRef",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        )
+
+
+    @validate_call
+    def test_echo_body_string_enum_without_preload_content(
+        self,
+        body: Annotated[Optional[StringEnumRef], Field(description="String enum")] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> RESTResponseType:
+        """Test string enum response body
+
+        Test string enum response body
+
+        :param body: String enum
+        :type body: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_echo_body_string_enum_serialize(
+            body=body,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "StringEnumRef",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        return response_data.response
+
+
+    def _test_echo_body_string_enum_serialize(
+        self,
+        body,
+        _request_auth,
+        _content_type,
+        _headers,
+        _host_index,
+    ) -> RequestSerialized:
+
+        _host = None
+
+        _collection_formats: Dict[str, str] = {
+        }
+
+        _path_params: Dict[str, str] = {}
+        _query_params: List[Tuple[str, str]] = []
+        _header_params: Dict[str, Optional[str]] = _headers or {}
+        _form_params: List[Tuple[str, str]] = []
+        _files: Dict[str, str] = {}
+        _body_params: Optional[bytes] = None
+
+        # process the path parameters
+        # process the query parameters
+        # process the header parameters
+        # process the form parameters
+        # process the body parameter
+        if body is not None:
+            _body_params = body
+
+
+        # set the HTTP header `Accept`
+        _header_params['Accept'] = self.api_client.select_header_accept(
+            [
+                'application/json'
+            ]
+        )
+
+        # set the HTTP header `Content-Type`
+        if _content_type:
+            _header_params['Content-Type'] = _content_type
+        else:
+            _default_content_type = (
+                self.api_client.select_header_content_type(
+                    [
+                        'application/json'
+                    ]
+                )
+            )
+            if _default_content_type is not None:
+                _header_params['Content-Type'] = _default_content_type
+
+        # authentication setting
+        _auth_settings: List[str] = [
+        ]
+
+        return self.api_client.param_serialize(
+            method='POST',
+            resource_path='/echo/body/string_enum',
+            path_params=_path_params,
+            query_params=_query_params,
+            header_params=_header_params,
+            body=_body_params,
+            post_params=_form_params,
+            files=_files,
+            auth_settings=_auth_settings,
+            collection_formats=_collection_formats,
+            _host=_host,
+            _request_auth=_request_auth
+        )
+
+
+
+
     @validate_call
     def test_echo_body_tag_response_string(
         self,
diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py
index 8987e22ac91..35b93bc02f3 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py
@@ -15,6 +15,7 @@
 
 import datetime
 from dateutil.parser import parse
+from enum import Enum
 import json
 import mimetypes
 import os
@@ -430,6 +431,8 @@ class ApiClient:
             return self.__deserialize_date(data)
         elif klass == datetime.datetime:
             return self.__deserialize_datetime(data)
+        elif issubclass(klass, Enum):
+            return self.__deserialize_enum(data, klass)
         else:
             return self.__deserialize_model(data, klass)
 
@@ -727,6 +730,24 @@ class ApiClient:
                 )
             )
 
+    def __deserialize_enum(self, data, klass):
+        """Deserializes primitive type to enum.
+
+        :param data: primitive type.
+        :param klass: class literal.
+        :return: enum value.
+        """
+        try:
+            return klass(data)
+        except ValueError:
+            raise rest.ApiException(
+                status=0,
+                reason=(
+                    "Failed to parse `{0}` as `{1}`"
+                    .format(data, klass)
+                )
+            )
+
     def __deserialize_model(self, data, klass):
         """Deserializes list or dict to model.
 
diff --git a/samples/client/echo_api/python-pydantic-v1/README.md b/samples/client/echo_api/python-pydantic-v1/README.md
index a9d7af2677c..00744453d77 100644
--- a/samples/client/echo_api/python-pydantic-v1/README.md
+++ b/samples/client/echo_api/python-pydantic-v1/README.md
@@ -104,6 +104,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**test_echo_body_free_form_object_response_string**](docs/BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**test_echo_body_pet**](docs/BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**test_echo_body_pet_response_string**](docs/BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**test_echo_body_string_enum**](docs/BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**test_echo_body_tag_response_string**](docs/BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**test_form_integer_boolean_string**](docs/FormApi.md#test_form_integer_boolean_string) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**test_form_oneof**](docs/FormApi.md#test_form_oneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/python-pydantic-v1/docs/BodyApi.md b/samples/client/echo_api/python-pydantic-v1/docs/BodyApi.md
index 228fcafd1d2..0f22b6b2a6d 100644
--- a/samples/client/echo_api/python-pydantic-v1/docs/BodyApi.md
+++ b/samples/client/echo_api/python-pydantic-v1/docs/BodyApi.md
@@ -12,6 +12,7 @@ Method | HTTP request | Description
 [**test_echo_body_free_form_object_response_string**](BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 [**test_echo_body_pet**](BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 [**test_echo_body_pet_response_string**](BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+[**test_echo_body_string_enum**](BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 [**test_echo_body_tag_response_string**](BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 
 
@@ -542,6 +543,73 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **test_echo_body_string_enum**
+> StringEnumRef test_echo_body_string_enum(body=body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+```python
+import time
+import os
+import openapi_client
+from openapi_client.models.string_enum_ref import StringEnumRef
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.BodyApi(api_client)
+    body = 'body_example' # str | String enum (optional)
+
+    try:
+        # Test string enum response body
+        api_response = api_instance.test_echo_body_string_enum(body=body)
+        print("The response of BodyApi->test_echo_body_string_enum:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling BodyApi->test_echo_body_string_enum: %s\n" % e)
+```
+
+
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | **str**| String enum | [optional] 
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
 # **test_echo_body_tag_response_string**
 > str test_echo_body_tag_response_string(tag=tag)
 
diff --git a/samples/client/echo_api/python-pydantic-v1/openapi_client/api/body_api.py b/samples/client/echo_api/python-pydantic-v1/openapi_client/api/body_api.py
index 62db8707477..73a283c02b1 100644
--- a/samples/client/echo_api/python-pydantic-v1/openapi_client/api/body_api.py
+++ b/samples/client/echo_api/python-pydantic-v1/openapi_client/api/body_api.py
@@ -25,6 +25,7 @@ from pydantic import Field, StrictBytes, StrictStr, conlist
 from typing import Any, Dict, Optional, Union
 
 from openapi_client.models.pet import Pet
+from openapi_client.models.string_enum_ref import StringEnumRef
 from openapi_client.models.tag import Tag
 
 from openapi_client.api_client import ApiClient
@@ -1214,6 +1215,153 @@ class BodyApi:
             collection_formats=_collection_formats,
             _request_auth=_params.get('_request_auth'))
 
+    @validate_arguments
+    def test_echo_body_string_enum(self, body : Annotated[Optional[StringEnumRef], Field(description="String enum")] = None, **kwargs) -> StringEnumRef:  # noqa: E501
+        """Test string enum response body  # noqa: E501
+
+        Test string enum response body  # noqa: E501
+        This method makes a synchronous HTTP request by default. To make an
+        asynchronous HTTP request, please pass async_req=True
+
+        >>> thread = api.test_echo_body_string_enum(body, async_req=True)
+        >>> result = thread.get()
+
+        :param body: String enum
+        :type body: str
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _request_timeout: timeout setting for this request.
+               If one number provided, it will be total request
+               timeout. It can also be a pair (tuple) of
+               (connection, read) timeouts.
+        :return: Returns the result object.
+                 If the method is called asynchronously,
+                 returns the request thread.
+        :rtype: StringEnumRef
+        """
+        kwargs['_return_http_data_only'] = True
+        if '_preload_content' in kwargs:
+            message = "Error! Please call the test_echo_body_string_enum_with_http_info method with `_preload_content` instead and obtain raw data from ApiResponse.raw_data"  # noqa: E501
+            raise ValueError(message)
+        return self.test_echo_body_string_enum_with_http_info(body, **kwargs)  # noqa: E501
+
+    @validate_arguments
+    def test_echo_body_string_enum_with_http_info(self, body : Annotated[Optional[StringEnumRef], Field(description="String enum")] = None, **kwargs) -> ApiResponse:  # noqa: E501
+        """Test string enum response body  # noqa: E501
+
+        Test string enum response body  # noqa: E501
+        This method makes a synchronous HTTP request by default. To make an
+        asynchronous HTTP request, please pass async_req=True
+
+        >>> thread = api.test_echo_body_string_enum_with_http_info(body, async_req=True)
+        >>> result = thread.get()
+
+        :param body: String enum
+        :type body: str
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _preload_content: if False, the ApiResponse.data will
+                                 be set to none and raw_data will store the
+                                 HTTP response body without reading/decoding.
+                                 Default is True.
+        :type _preload_content: bool, optional
+        :param _return_http_data_only: response data instead of ApiResponse
+                                       object with status code, headers, etc
+        :type _return_http_data_only: bool, optional
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
+        :type _content_type: string, optional: force content-type for the request
+        :return: Returns the result object.
+                 If the method is called asynchronously,
+                 returns the request thread.
+        :rtype: tuple(StringEnumRef, status_code(int), headers(HTTPHeaderDict))
+        """
+
+        _params = locals()
+
+        _all_params = [
+            'body'
+        ]
+        _all_params.extend(
+            [
+                'async_req',
+                '_return_http_data_only',
+                '_preload_content',
+                '_request_timeout',
+                '_request_auth',
+                '_content_type',
+                '_headers'
+            ]
+        )
+
+        # validate the arguments
+        for _key, _val in _params['kwargs'].items():
+            if _key not in _all_params:
+                raise ApiTypeError(
+                    "Got an unexpected keyword argument '%s'"
+                    " to method test_echo_body_string_enum" % _key
+                )
+            _params[_key] = _val
+        del _params['kwargs']
+
+        _collection_formats = {}
+
+        # process the path parameters
+        _path_params = {}
+
+        # process the query parameters
+        _query_params = []
+        # process the header parameters
+        _header_params = dict(_params.get('_headers', {}))
+        # process the form parameters
+        _form_params = []
+        _files = {}
+        # process the body parameter
+        _body_params = None
+        if _params['body'] is not None:
+            _body_params = _params['body']
+
+        # set the HTTP header `Accept`
+        _header_params['Accept'] = self.api_client.select_header_accept(
+            ['application/json'])  # noqa: E501
+
+        # set the HTTP header `Content-Type`
+        _content_types_list = _params.get('_content_type',
+            self.api_client.select_header_content_type(
+                ['application/json']))
+        if _content_types_list:
+                _header_params['Content-Type'] = _content_types_list
+
+        # authentication setting
+        _auth_settings = []  # noqa: E501
+
+        _response_types_map = {
+            '200': "StringEnumRef",
+        }
+
+        return self.api_client.call_api(
+            '/echo/body/string_enum', 'POST',
+            _path_params,
+            _query_params,
+            _header_params,
+            body=_body_params,
+            post_params=_form_params,
+            files=_files,
+            response_types_map=_response_types_map,
+            auth_settings=_auth_settings,
+            async_req=_params.get('async_req'),
+            _return_http_data_only=_params.get('_return_http_data_only'),  # noqa: E501
+            _preload_content=_params.get('_preload_content', True),
+            _request_timeout=_params.get('_request_timeout'),
+            collection_formats=_collection_formats,
+            _request_auth=_params.get('_request_auth'))
+
     @validate_arguments
     def test_echo_body_tag_response_string(self, tag : Annotated[Optional[Tag], Field(description="Tag object")] = None, **kwargs) -> str:  # noqa: E501
         """Test empty json (request body)  # noqa: E501
diff --git a/samples/client/echo_api/python/README.md b/samples/client/echo_api/python/README.md
index 6140414aa42..823e6c517cd 100644
--- a/samples/client/echo_api/python/README.md
+++ b/samples/client/echo_api/python/README.md
@@ -103,6 +103,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**test_echo_body_free_form_object_response_string**](docs/BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**test_echo_body_pet**](docs/BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**test_echo_body_pet_response_string**](docs/BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**test_echo_body_string_enum**](docs/BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**test_echo_body_tag_response_string**](docs/BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**test_form_integer_boolean_string**](docs/FormApi.md#test_form_integer_boolean_string) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**test_form_oneof**](docs/FormApi.md#test_form_oneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/python/docs/BodyApi.md b/samples/client/echo_api/python/docs/BodyApi.md
index acfbe28268d..d4cc6d4dab6 100644
--- a/samples/client/echo_api/python/docs/BodyApi.md
+++ b/samples/client/echo_api/python/docs/BodyApi.md
@@ -12,6 +12,7 @@ Method | HTTP request | Description
 [**test_echo_body_free_form_object_response_string**](BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 [**test_echo_body_pet**](BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 [**test_echo_body_pet_response_string**](BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+[**test_echo_body_string_enum**](BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 [**test_echo_body_tag_response_string**](BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 
 
@@ -550,6 +551,74 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **test_echo_body_string_enum**
+> StringEnumRef test_echo_body_string_enum(body=body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+
+
+```python
+import openapi_client
+from openapi_client.models.string_enum_ref import StringEnumRef
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.BodyApi(api_client)
+    body = 'body_example' # str | String enum (optional)
+
+    try:
+        # Test string enum response body
+        api_response = api_instance.test_echo_body_string_enum(body=body)
+        print("The response of BodyApi->test_echo_body_string_enum:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling BodyApi->test_echo_body_string_enum: %s\n" % e)
+```
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | **str**| String enum | [optional] 
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+### HTTP response details
+
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
 # **test_echo_body_tag_response_string**
 > str test_echo_body_tag_response_string(tag=tag)
 
diff --git a/samples/client/echo_api/python/openapi_client/api/body_api.py b/samples/client/echo_api/python/openapi_client/api/body_api.py
index d9c2d64bea2..dfb53f26d44 100644
--- a/samples/client/echo_api/python/openapi_client/api/body_api.py
+++ b/samples/client/echo_api/python/openapi_client/api/body_api.py
@@ -21,6 +21,7 @@ from pydantic import Field, StrictBytes, StrictStr
 from typing import Any, Dict, List, Optional, Union
 from typing_extensions import Annotated
 from openapi_client.models.pet import Pet
+from openapi_client.models.string_enum_ref import StringEnumRef
 from openapi_client.models.tag import Tag
 
 from openapi_client.api_client import ApiClient, RequestSerialized
@@ -2179,6 +2180,276 @@ class BodyApi:
 
 
 
+    @validate_call
+    def test_echo_body_string_enum(
+        self,
+        body: Annotated[Optional[StringEnumRef], Field(description="String enum")] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> StringEnumRef:
+        """Test string enum response body
+
+        Test string enum response body
+
+        :param body: String enum
+        :type body: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_echo_body_string_enum_serialize(
+            body=body,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "StringEnumRef",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        ).data
+
+
+    @validate_call
+    def test_echo_body_string_enum_with_http_info(
+        self,
+        body: Annotated[Optional[StringEnumRef], Field(description="String enum")] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> ApiResponse[StringEnumRef]:
+        """Test string enum response body
+
+        Test string enum response body
+
+        :param body: String enum
+        :type body: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_echo_body_string_enum_serialize(
+            body=body,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "StringEnumRef",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        )
+
+
+    @validate_call
+    def test_echo_body_string_enum_without_preload_content(
+        self,
+        body: Annotated[Optional[StringEnumRef], Field(description="String enum")] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> RESTResponseType:
+        """Test string enum response body
+
+        Test string enum response body
+
+        :param body: String enum
+        :type body: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_echo_body_string_enum_serialize(
+            body=body,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "StringEnumRef",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        return response_data.response
+
+
+    def _test_echo_body_string_enum_serialize(
+        self,
+        body,
+        _request_auth,
+        _content_type,
+        _headers,
+        _host_index,
+    ) -> RequestSerialized:
+
+        _host = None
+
+        _collection_formats: Dict[str, str] = {
+        }
+
+        _path_params: Dict[str, str] = {}
+        _query_params: List[Tuple[str, str]] = []
+        _header_params: Dict[str, Optional[str]] = _headers or {}
+        _form_params: List[Tuple[str, str]] = []
+        _files: Dict[str, str] = {}
+        _body_params: Optional[bytes] = None
+
+        # process the path parameters
+        # process the query parameters
+        # process the header parameters
+        # process the form parameters
+        # process the body parameter
+        if body is not None:
+            _body_params = body
+
+
+        # set the HTTP header `Accept`
+        _header_params['Accept'] = self.api_client.select_header_accept(
+            [
+                'application/json'
+            ]
+        )
+
+        # set the HTTP header `Content-Type`
+        if _content_type:
+            _header_params['Content-Type'] = _content_type
+        else:
+            _default_content_type = (
+                self.api_client.select_header_content_type(
+                    [
+                        'application/json'
+                    ]
+                )
+            )
+            if _default_content_type is not None:
+                _header_params['Content-Type'] = _default_content_type
+
+        # authentication setting
+        _auth_settings: List[str] = [
+        ]
+
+        return self.api_client.param_serialize(
+            method='POST',
+            resource_path='/echo/body/string_enum',
+            path_params=_path_params,
+            query_params=_query_params,
+            header_params=_header_params,
+            body=_body_params,
+            post_params=_form_params,
+            files=_files,
+            auth_settings=_auth_settings,
+            collection_formats=_collection_formats,
+            _host=_host,
+            _request_auth=_request_auth
+        )
+
+
+
+
     @validate_call
     def test_echo_body_tag_response_string(
         self,
diff --git a/samples/client/echo_api/python/openapi_client/api_client.py b/samples/client/echo_api/python/openapi_client/api_client.py
index 8987e22ac91..35b93bc02f3 100644
--- a/samples/client/echo_api/python/openapi_client/api_client.py
+++ b/samples/client/echo_api/python/openapi_client/api_client.py
@@ -15,6 +15,7 @@
 
 import datetime
 from dateutil.parser import parse
+from enum import Enum
 import json
 import mimetypes
 import os
@@ -430,6 +431,8 @@ class ApiClient:
             return self.__deserialize_date(data)
         elif klass == datetime.datetime:
             return self.__deserialize_datetime(data)
+        elif issubclass(klass, Enum):
+            return self.__deserialize_enum(data, klass)
         else:
             return self.__deserialize_model(data, klass)
 
@@ -727,6 +730,24 @@ class ApiClient:
                 )
             )
 
+    def __deserialize_enum(self, data, klass):
+        """Deserializes primitive type to enum.
+
+        :param data: primitive type.
+        :param klass: class literal.
+        :return: enum value.
+        """
+        try:
+            return klass(data)
+        except ValueError:
+            raise rest.ApiException(
+                status=0,
+                reason=(
+                    "Failed to parse `{0}` as `{1}`"
+                    .format(data, klass)
+                )
+            )
+
     def __deserialize_model(self, data, klass):
         """Deserializes list or dict to model.
 
diff --git a/samples/client/echo_api/python/tests/test_manual.py b/samples/client/echo_api/python/tests/test_manual.py
index 5d3b0d9385a..b627e673536 100644
--- a/samples/client/echo_api/python/tests/test_manual.py
+++ b/samples/client/echo_api/python/tests/test_manual.py
@@ -18,6 +18,7 @@ import base64
 import os
 
 import openapi_client
+from openapi_client import StringEnumRef
 from openapi_client.api.query_api import QueryApi # noqa: E501
 from openapi_client.rest import ApiException
 
@@ -118,6 +119,13 @@ class TestManual(unittest.TestCase):
         e = EchoServerResponseParser(api_response)
         self.assertEqual(e.path, "/query/datetime/date/string?datetime_query=2013-10-20T19%3A20%3A30.000000-0500&date_query=2013-10-20&string_query=string_query_example")
 
+    def testStringEnum(self):
+        api_instance = openapi_client.BodyApi()
+
+        # Test string enum response
+        api_response = api_instance.test_echo_body_string_enum(StringEnumRef.SUCCESS)
+        self.assertEqual(api_response, StringEnumRef.SUCCESS)
+
     def testBinaryGif(self):
         api_instance = openapi_client.BodyApi()
 
diff --git a/samples/client/echo_api/r/R/body_api.R b/samples/client/echo_api/r/R/body_api.R
index 9f3c751b251..5e23d058143 100644
--- a/samples/client/echo_api/r/R/body_api.R
+++ b/samples/client/echo_api/r/R/body_api.R
@@ -143,6 +143,23 @@
 #' }
 #' }
 #'
+#' \strong{ TestEchoBodyStringEnum } \emph{ Test string enum response body }
+#' Test string enum response body
+#'
+#' \itemize{
+#' \item \emph{ @param } body character
+#' \item \emph{ @returnType } \link{StringEnumRef} \cr
+#'
+#'
+#' \item status code : 200 | Successful operation
+#'
+#' \item return type : StringEnumRef
+#' \item response headers :
+#'
+#' \tabular{ll}{
+#' }
+#' }
+#'
 #' \strong{ TestEchoBodyTagResponseString } \emph{ Test empty json (request body) }
 #' Test empty json (request body)
 #'
@@ -275,6 +292,20 @@
 #' dput(result)
 #'
 #'
+#' ####################  TestEchoBodyStringEnum  ####################
+#'
+#' library(openapi)
+#' var_body <- "body_example" # character | String enum (Optional)
+#'
+#' #Test string enum response body
+#' api_instance <- BodyApi$new()
+#'
+#' # to save the result into a file, simply add the optional `data_file` parameter, e.g.
+#' # result <- api_instance$TestEchoBodyStringEnum(body = var_bodydata_file = "result.txt")
+#' result <- api_instance$TestEchoBodyStringEnum(body = var_body)
+#' dput(result)
+#'
+#'
 #' ####################  TestEchoBodyTagResponseString  ####################
 #'
 #' library(openapi)
@@ -1056,6 +1087,101 @@ BodyApi <- R6::R6Class(
         local_var_resp
       }
     },
+    #' Test string enum response body
+    #'
+    #' @description
+    #' Test string enum response body
+    #'
+    #' @param body (optional) String enum
+    #' @param data_file (optional) name of the data file to save the result
+    #' @param ... Other optional arguments
+    #' @return StringEnumRef
+    #' @export
+    TestEchoBodyStringEnum = function(body = NULL, data_file = NULL, ...) {
+      local_var_response <- self$TestEchoBodyStringEnumWithHttpInfo(body, data_file = data_file, ...)
+      if (local_var_response$status_code >= 200 && local_var_response$status_code <= 299) {
+        local_var_response$content
+      } else if (local_var_response$status_code >= 300 && local_var_response$status_code <= 399) {
+        local_var_response
+      } else if (local_var_response$status_code >= 400 && local_var_response$status_code <= 499) {
+        local_var_response
+      } else if (local_var_response$status_code >= 500 && local_var_response$status_code <= 599) {
+        local_var_response
+      }
+    },
+    #' Test string enum response body
+    #'
+    #' @description
+    #' Test string enum response body
+    #'
+    #' @param body (optional) String enum
+    #' @param data_file (optional) name of the data file to save the result
+    #' @param ... Other optional arguments
+    #' @return API response (StringEnumRef) with additional information such as HTTP status code, headers
+    #' @export
+    TestEchoBodyStringEnumWithHttpInfo = function(body = NULL, data_file = NULL, ...) {
+      args <- list(...)
+      query_params <- list()
+      header_params <- c()
+      form_params <- list()
+      file_params <- list()
+      local_var_body <- NULL
+      oauth_scopes <- NULL
+      is_oauth <- FALSE
+
+
+      if (!is.null(`body`)) {
+        local_var_body <- `body`$toJSONString()
+      } else {
+        body <- NULL
+      }
+
+      local_var_url_path <- "/echo/body/string_enum"
+
+      # The Accept request HTTP header
+      local_var_accepts <- list("application/json")
+
+      # The Content-Type representation header
+      local_var_content_types <- list("application/json")
+
+      local_var_resp <- self$api_client$CallApi(url = paste0(self$api_client$base_path, local_var_url_path),
+                                 method = "POST",
+                                 query_params = query_params,
+                                 header_params = header_params,
+                                 form_params = form_params,
+                                 file_params = file_params,
+                                 accepts = local_var_accepts,
+                                 content_types = local_var_content_types,
+                                 body = local_var_body,
+                                 is_oauth = is_oauth,
+                                 oauth_scopes = oauth_scopes,
+                                 ...)
+
+      if (local_var_resp$status_code >= 200 && local_var_resp$status_code <= 299) {
+        # save response in a file
+        if (!is.null(data_file)) {
+          write(local_var_resp$response, data_file)
+        }
+
+        deserialized_resp_obj <- tryCatch(
+          self$api_client$deserialize(local_var_resp$response_as_text(), "StringEnumRef", loadNamespace("openapi")),
+          error = function(e) {
+            stop("Failed to deserialize response")
+          }
+        )
+        local_var_resp$content <- deserialized_resp_obj
+        local_var_resp
+      } else if (local_var_resp$status_code >= 300 && local_var_resp$status_code <= 399) {
+        ApiResponse$new(paste("Server returned ", local_var_resp$status_code, " response status code."), local_var_resp)
+      } else if (local_var_resp$status_code >= 400 && local_var_resp$status_code <= 499) {
+        ApiResponse$new("API client error", local_var_resp)
+      } else if (local_var_resp$status_code >= 500 && local_var_resp$status_code <= 599) {
+        if (is.null(local_var_resp$response) || local_var_resp$response == "") {
+          local_var_resp$response <- "API server error"
+        }
+        local_var_resp
+      }
+    },
     #' Test empty json (request body)
     #'
     #' @description
diff --git a/samples/client/echo_api/r/README.md b/samples/client/echo_api/r/README.md
index 509644c61bc..ec31da7fffc 100644
--- a/samples/client/echo_api/r/README.md
+++ b/samples/client/echo_api/r/README.md
@@ -82,6 +82,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**TestEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#TestEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**TestEchoBodyPet**](docs/BodyApi.md#TestEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**TestEchoBodyPetResponseString**](docs/BodyApi.md#TestEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**TestEchoBodyStringEnum**](docs/BodyApi.md#TestEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**TestEchoBodyTagResponseString**](docs/BodyApi.md#TestEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**TestFormIntegerBooleanString**](docs/FormApi.md#TestFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**TestFormOneof**](docs/FormApi.md#TestFormOneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/r/docs/BodyApi.md b/samples/client/echo_api/r/docs/BodyApi.md
index 9d631b65ce8..9ff03a4ff91 100644
--- a/samples/client/echo_api/r/docs/BodyApi.md
+++ b/samples/client/echo_api/r/docs/BodyApi.md
@@ -12,6 +12,7 @@ Method | HTTP request | Description
 [**TestEchoBodyFreeFormObjectResponseString**](BodyApi.md#TestEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 [**TestEchoBodyPet**](BodyApi.md#TestEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 [**TestEchoBodyPetResponseString**](BodyApi.md#TestEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+[**TestEchoBodyStringEnum**](BodyApi.md#TestEchoBodyStringEnum) | **POST** /echo/body/string_enum | Test string enum response body
 [**TestEchoBodyTagResponseString**](BodyApi.md#TestEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 
 
@@ -386,6 +387,53 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+# **TestEchoBodyStringEnum**
+> StringEnumRef TestEchoBodyStringEnum(body = var.body)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+```R
+library(openapi)
+
+# Test string enum response body
+#
+# prepare function argument(s)
+var_body <- "body_example" # character | String enum (Optional)
+
+api_instance <- BodyApi$new()
+# to save the result into a file, simply add the optional `data_file` parameter, e.g.
+# result <- api_instance$TestEchoBodyStringEnum(body = var_bodydata_file = "result.txt")
+result <- api_instance$TestEchoBodyStringEnum(body = var_body)
+dput(result)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | **character**| String enum | [optional] 
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
 # **TestEchoBodyTagResponseString**
 > character TestEchoBodyTagResponseString(tag = var.tag)
 
diff --git a/samples/client/echo_api/ruby-faraday/README.md b/samples/client/echo_api/ruby-faraday/README.md
index 184300558b5..df081d6cfa4 100644
--- a/samples/client/echo_api/ruby-faraday/README.md
+++ b/samples/client/echo_api/ruby-faraday/README.md
@@ -93,6 +93,7 @@ Class | Method | HTTP request | Description
 *OpenapiClient::BodyApi* | [**test_echo_body_free_form_object_response_string**](docs/BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *OpenapiClient::BodyApi* | [**test_echo_body_pet**](docs/BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 *OpenapiClient::BodyApi* | [**test_echo_body_pet_response_string**](docs/BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+*OpenapiClient::BodyApi* | [**test_echo_body_string_enum**](docs/BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 *OpenapiClient::BodyApi* | [**test_echo_body_tag_response_string**](docs/BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *OpenapiClient::FormApi* | [**test_form_integer_boolean_string**](docs/FormApi.md#test_form_integer_boolean_string) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *OpenapiClient::FormApi* | [**test_form_oneof**](docs/FormApi.md#test_form_oneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/ruby-faraday/docs/BodyApi.md b/samples/client/echo_api/ruby-faraday/docs/BodyApi.md
index f5d6d57479e..b4a119e97c2 100644
--- a/samples/client/echo_api/ruby-faraday/docs/BodyApi.md
+++ b/samples/client/echo_api/ruby-faraday/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**test_echo_body_free_form_object_response_string**](BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**test_echo_body_pet**](BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**test_echo_body_pet_response_string**](BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**test_echo_body_string_enum**](BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**test_echo_body_tag_response_string**](BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -536,6 +537,72 @@ No authorization required
 - **Accept**: text/plain
 
 
+## test_echo_body_string_enum
+
+> <StringEnumRef> test_echo_body_string_enum(opts)
+
+Test string enum response body
+
+Test string enum response body
+
+### Examples
+
+```ruby
+require 'time'
+require 'openapi_client'
+
+api_instance = OpenapiClient::BodyApi.new
+opts = {
+  body: 'body_example' # String | String enum
+}
+
+begin
+  # Test string enum response body
+  result = api_instance.test_echo_body_string_enum(opts)
+  p result
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling BodyApi->test_echo_body_string_enum: #{e}"
+end
+```
+
+#### Using the test_echo_body_string_enum_with_http_info variant
+
+This returns an Array which contains the response data, status code and headers.
+
+> <Array(<StringEnumRef>, Integer, Hash)> test_echo_body_string_enum_with_http_info(opts)
+
+```ruby
+begin
+  # Test string enum response body
+  data, status_code, headers = api_instance.test_echo_body_string_enum_with_http_info(opts)
+  p status_code # => 2xx
+  p headers # => { ... }
+  p data # => <StringEnumRef>
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling BodyApi->test_echo_body_string_enum_with_http_info: #{e}"
+end
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+| ---- | ---- | ----------- | ----- |
+| **body** | **String** | String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+
 ## test_echo_body_tag_response_string
 
 > String test_echo_body_tag_response_string(opts)
diff --git a/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/body_api.rb b/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/body_api.rb
index 16dc16b730b..dfccf039ebd 100644
--- a/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/body_api.rb
+++ b/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/body_api.rb
@@ -530,6 +530,70 @@ module OpenapiClient
       return data, status_code, headers
     end
 
+    # Test string enum response body
+    # Test string enum response body
+    # @param [Hash] opts the optional parameters
+    # @option opts [String] :body String enum
+    # @return [StringEnumRef]
+    def test_echo_body_string_enum(opts = {})
+      data, _status_code, _headers = test_echo_body_string_enum_with_http_info(opts)
+      data
+    end
+
+    # Test string enum response body
+    # Test string enum response body
+    # @param [Hash] opts the optional parameters
+    # @option opts [String] :body String enum
+    # @return [Array<(StringEnumRef, Integer, Hash)>] StringEnumRef data, response status code and response headers
+    def test_echo_body_string_enum_with_http_info(opts = {})
+      if @api_client.config.debugging
+        @api_client.config.logger.debug 'Calling API: BodyApi.test_echo_body_string_enum ...'
+      end
+      # resource path
+      local_var_path = '/echo/body/string_enum'
+
+      # query parameters
+      query_params = opts[:query_params] || {}
+
+      # header parameters
+      header_params = opts[:header_params] || {}
+      # HTTP header 'Accept' (if needed)
+      header_params['Accept'] = @api_client.select_header_accept(['application/json'])
+      # HTTP header 'Content-Type'
+      content_type = @api_client.select_header_content_type(['application/json'])
+      if !content_type.nil?
+          header_params['Content-Type'] = content_type
+      end
+
+      # form parameters
+      form_params = opts[:form_params] || {}
+
+      # http body (model)
+      post_body = opts[:debug_body] || @api_client.object_to_http_body(opts[:'body'])
+
+      # return_type
+      return_type = opts[:debug_return_type] || 'StringEnumRef'
+
+      # auth_names
+      auth_names = opts[:debug_auth_names] || []
+
+      new_options = opts.merge(
+        :operation => :"BodyApi.test_echo_body_string_enum",
+        :header_params => header_params,
+        :query_params => query_params,
+        :form_params => form_params,
+        :body => post_body,
+        :auth_names => auth_names,
+        :return_type => return_type
+      )
+
+      data, status_code, headers = @api_client.call_api(:POST, local_var_path, new_options)
+      if @api_client.config.debugging
+        @api_client.config.logger.debug "API called: BodyApi#test_echo_body_string_enum\nData: #{data.inspect}\nStatus code: #{status_code}\nHeaders: #{headers}"
+      end
+      return data, status_code, headers
+    end
+
     # Test empty json (request body)
     # Test empty json (request body)
     # @param [Hash] opts the optional parameters
diff --git a/samples/client/echo_api/ruby-httpx/README.md b/samples/client/echo_api/ruby-httpx/README.md
index ea9a964bec0..6fd0297b794 100644
--- a/samples/client/echo_api/ruby-httpx/README.md
+++ b/samples/client/echo_api/ruby-httpx/README.md
@@ -93,6 +93,7 @@ Class | Method | HTTP request | Description
 *OpenapiClient::BodyApi* | [**test_echo_body_free_form_object_response_string**](docs/BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *OpenapiClient::BodyApi* | [**test_echo_body_pet**](docs/BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 *OpenapiClient::BodyApi* | [**test_echo_body_pet_response_string**](docs/BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+*OpenapiClient::BodyApi* | [**test_echo_body_string_enum**](docs/BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 *OpenapiClient::BodyApi* | [**test_echo_body_tag_response_string**](docs/BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *OpenapiClient::FormApi* | [**test_form_integer_boolean_string**](docs/FormApi.md#test_form_integer_boolean_string) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *OpenapiClient::FormApi* | [**test_form_oneof**](docs/FormApi.md#test_form_oneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/ruby-httpx/docs/BodyApi.md b/samples/client/echo_api/ruby-httpx/docs/BodyApi.md
index f5d6d57479e..b4a119e97c2 100644
--- a/samples/client/echo_api/ruby-httpx/docs/BodyApi.md
+++ b/samples/client/echo_api/ruby-httpx/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**test_echo_body_free_form_object_response_string**](BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**test_echo_body_pet**](BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**test_echo_body_pet_response_string**](BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**test_echo_body_string_enum**](BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**test_echo_body_tag_response_string**](BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -536,6 +537,72 @@ No authorization required
 - **Accept**: text/plain
 
 
+## test_echo_body_string_enum
+
+> <StringEnumRef> test_echo_body_string_enum(opts)
+
+Test string enum response body
+
+Test string enum response body
+
+### Examples
+
+```ruby
+require 'time'
+require 'openapi_client'
+
+api_instance = OpenapiClient::BodyApi.new
+opts = {
+  body: 'body_example' # String | String enum
+}
+
+begin
+  # Test string enum response body
+  result = api_instance.test_echo_body_string_enum(opts)
+  p result
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling BodyApi->test_echo_body_string_enum: #{e}"
+end
+```
+
+#### Using the test_echo_body_string_enum_with_http_info variant
+
+This returns an Array which contains the response data, status code and headers.
+
+> <Array(<StringEnumRef>, Integer, Hash)> test_echo_body_string_enum_with_http_info(opts)
+
+```ruby
+begin
+  # Test string enum response body
+  data, status_code, headers = api_instance.test_echo_body_string_enum_with_http_info(opts)
+  p status_code # => 2xx
+  p headers # => { ... }
+  p data # => <StringEnumRef>
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling BodyApi->test_echo_body_string_enum_with_http_info: #{e}"
+end
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+| ---- | ---- | ----------- | ----- |
+| **body** | **String** | String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+
 ## test_echo_body_tag_response_string
 
 > String test_echo_body_tag_response_string(opts)
diff --git a/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/body_api.rb b/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/body_api.rb
index 16dc16b730b..dfccf039ebd 100644
--- a/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/body_api.rb
+++ b/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/body_api.rb
@@ -530,6 +530,70 @@ module OpenapiClient
       return data, status_code, headers
     end
 
+    # Test string enum response body
+    # Test string enum response body
+    # @param [Hash] opts the optional parameters
+    # @option opts [String] :body String enum
+    # @return [StringEnumRef]
+    def test_echo_body_string_enum(opts = {})
+      data, _status_code, _headers = test_echo_body_string_enum_with_http_info(opts)
+      data
+    end
+
+    # Test string enum response body
+    # Test string enum response body
+    # @param [Hash] opts the optional parameters
+    # @option opts [String] :body String enum
+    # @return [Array<(StringEnumRef, Integer, Hash)>] StringEnumRef data, response status code and response headers
+    def test_echo_body_string_enum_with_http_info(opts = {})
+      if @api_client.config.debugging
+        @api_client.config.logger.debug 'Calling API: BodyApi.test_echo_body_string_enum ...'
+      end
+      # resource path
+      local_var_path = '/echo/body/string_enum'
+
+      # query parameters
+      query_params = opts[:query_params] || {}
+
+      # header parameters
+      header_params = opts[:header_params] || {}
+      # HTTP header 'Accept' (if needed)
+      header_params['Accept'] = @api_client.select_header_accept(['application/json'])
+      # HTTP header 'Content-Type'
+      content_type = @api_client.select_header_content_type(['application/json'])
+      if !content_type.nil?
+          header_params['Content-Type'] = content_type
+      end
+
+      # form parameters
+      form_params = opts[:form_params] || {}
+
+      # http body (model)
+      post_body = opts[:debug_body] || @api_client.object_to_http_body(opts[:'body'])
+
+      # return_type
+      return_type = opts[:debug_return_type] || 'StringEnumRef'
+
+      # auth_names
+      auth_names = opts[:debug_auth_names] || []
+
+      new_options = opts.merge(
+        :operation => :"BodyApi.test_echo_body_string_enum",
+        :header_params => header_params,
+        :query_params => query_params,
+        :form_params => form_params,
+        :body => post_body,
+        :auth_names => auth_names,
+        :return_type => return_type
+      )
+
+      data, status_code, headers = @api_client.call_api(:POST, local_var_path, new_options)
+      if @api_client.config.debugging
+        @api_client.config.logger.debug "API called: BodyApi#test_echo_body_string_enum\nData: #{data.inspect}\nStatus code: #{status_code}\nHeaders: #{headers}"
+      end
+      return data, status_code, headers
+    end
+
     # Test empty json (request body)
     # Test empty json (request body)
     # @param [Hash] opts the optional parameters
diff --git a/samples/client/echo_api/ruby-typhoeus/README.md b/samples/client/echo_api/ruby-typhoeus/README.md
index 6c194cbdc43..c3a68c4c798 100644
--- a/samples/client/echo_api/ruby-typhoeus/README.md
+++ b/samples/client/echo_api/ruby-typhoeus/README.md
@@ -91,6 +91,7 @@ Class | Method | HTTP request | Description
 *OpenapiClient::BodyApi* | [**test_echo_body_free_form_object_response_string**](docs/BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *OpenapiClient::BodyApi* | [**test_echo_body_pet**](docs/BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s)
 *OpenapiClient::BodyApi* | [**test_echo_body_pet_response_string**](docs/BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body
+*OpenapiClient::BodyApi* | [**test_echo_body_string_enum**](docs/BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body
 *OpenapiClient::BodyApi* | [**test_echo_body_tag_response_string**](docs/BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *OpenapiClient::FormApi* | [**test_form_integer_boolean_string**](docs/FormApi.md#test_form_integer_boolean_string) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *OpenapiClient::FormApi* | [**test_form_oneof**](docs/FormApi.md#test_form_oneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema
diff --git a/samples/client/echo_api/ruby-typhoeus/docs/BodyApi.md b/samples/client/echo_api/ruby-typhoeus/docs/BodyApi.md
index f5d6d57479e..b4a119e97c2 100644
--- a/samples/client/echo_api/ruby-typhoeus/docs/BodyApi.md
+++ b/samples/client/echo_api/ruby-typhoeus/docs/BodyApi.md
@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**test_echo_body_free_form_object_response_string**](BodyApi.md#test_echo_body_free_form_object_response_string) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**test_echo_body_pet**](BodyApi.md#test_echo_body_pet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**test_echo_body_pet_response_string**](BodyApi.md#test_echo_body_pet_response_string) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**test_echo_body_string_enum**](BodyApi.md#test_echo_body_string_enum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**test_echo_body_tag_response_string**](BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
@@ -536,6 +537,72 @@ No authorization required
 - **Accept**: text/plain
 
 
+## test_echo_body_string_enum
+
+> <StringEnumRef> test_echo_body_string_enum(opts)
+
+Test string enum response body
+
+Test string enum response body
+
+### Examples
+
+```ruby
+require 'time'
+require 'openapi_client'
+
+api_instance = OpenapiClient::BodyApi.new
+opts = {
+  body: 'body_example' # String | String enum
+}
+
+begin
+  # Test string enum response body
+  result = api_instance.test_echo_body_string_enum(opts)
+  p result
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling BodyApi->test_echo_body_string_enum: #{e}"
+end
+```
+
+#### Using the test_echo_body_string_enum_with_http_info variant
+
+This returns an Array which contains the response data, status code and headers.
+
+> <Array(<StringEnumRef>, Integer, Hash)> test_echo_body_string_enum_with_http_info(opts)
+
+```ruby
+begin
+  # Test string enum response body
+  data, status_code, headers = api_instance.test_echo_body_string_enum_with_http_info(opts)
+  p status_code # => 2xx
+  p headers # => { ... }
+  p data # => <StringEnumRef>
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling BodyApi->test_echo_body_string_enum_with_http_info: #{e}"
+end
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+| ---- | ---- | ----------- | ----- |
+| **body** | **String** | String enum | [optional] |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+
 ## test_echo_body_tag_response_string
 
 > String test_echo_body_tag_response_string(opts)
diff --git a/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/body_api.rb b/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/body_api.rb
index 16dc16b730b..dfccf039ebd 100644
--- a/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/body_api.rb
+++ b/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/body_api.rb
@@ -530,6 +530,70 @@ module OpenapiClient
       return data, status_code, headers
     end
 
+    # Test string enum response body
+    # Test string enum response body
+    # @param [Hash] opts the optional parameters
+    # @option opts [String] :body String enum
+    # @return [StringEnumRef]
+    def test_echo_body_string_enum(opts = {})
+      data, _status_code, _headers = test_echo_body_string_enum_with_http_info(opts)
+      data
+    end
+
+    # Test string enum response body
+    # Test string enum response body
+    # @param [Hash] opts the optional parameters
+    # @option opts [String] :body String enum
+    # @return [Array<(StringEnumRef, Integer, Hash)>] StringEnumRef data, response status code and response headers
+    def test_echo_body_string_enum_with_http_info(opts = {})
+      if @api_client.config.debugging
+        @api_client.config.logger.debug 'Calling API: BodyApi.test_echo_body_string_enum ...'
+      end
+      # resource path
+      local_var_path = '/echo/body/string_enum'
+
+      # query parameters
+      query_params = opts[:query_params] || {}
+
+      # header parameters
+      header_params = opts[:header_params] || {}
+      # HTTP header 'Accept' (if needed)
+      header_params['Accept'] = @api_client.select_header_accept(['application/json'])
+      # HTTP header 'Content-Type'
+      content_type = @api_client.select_header_content_type(['application/json'])
+      if !content_type.nil?
+          header_params['Content-Type'] = content_type
+      end
+
+      # form parameters
+      form_params = opts[:form_params] || {}
+
+      # http body (model)
+      post_body = opts[:debug_body] || @api_client.object_to_http_body(opts[:'body'])
+
+      # return_type
+      return_type = opts[:debug_return_type] || 'StringEnumRef'
+
+      # auth_names
+      auth_names = opts[:debug_auth_names] || []
+
+      new_options = opts.merge(
+        :operation => :"BodyApi.test_echo_body_string_enum",
+        :header_params => header_params,
+        :query_params => query_params,
+        :form_params => form_params,
+        :body => post_body,
+        :auth_names => auth_names,
+        :return_type => return_type
+      )
+
+      data, status_code, headers = @api_client.call_api(:POST, local_var_path, new_options)
+      if @api_client.config.debugging
+        @api_client.config.logger.debug "API called: BodyApi#test_echo_body_string_enum\nData: #{data.inspect}\nStatus code: #{status_code}\nHeaders: #{headers}"
+      end
+      return data, status_code, headers
+    end
+
     # Test empty json (request body)
     # Test empty json (request body)
     # @param [Hash] opts the optional parameters
diff --git a/samples/client/echo_api/typescript-axios/build/api.ts b/samples/client/echo_api/typescript-axios/build/api.ts
index 9c021d6d21d..c6874e7a43f 100644
--- a/samples/client/echo_api/typescript-axios/build/api.ts
+++ b/samples/client/echo_api/typescript-axios/build/api.ts
@@ -795,6 +795,40 @@ export const BodyApiAxiosParamCreator = function (configuration?: Configuration)
                 options: localVarRequestOptions,
             };
         },
+        /**
+         * Test string enum response body
+         * @summary Test string enum response body
+         * @param {string} [body] String enum
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        testEchoBodyStringEnum: async (body?: string, options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
+            const localVarPath = `/echo/body/string_enum`;
+            // use dummy base URL string because the URL constructor only accepts absolute URLs.
+            const localVarUrlObj = new URL(localVarPath, DUMMY_BASE_URL);
+            let baseOptions;
+            if (configuration) {
+                baseOptions = configuration.baseOptions;
+            }
+
+            const localVarRequestOptions = { method: 'POST', ...baseOptions, ...options};
+            const localVarHeaderParameter = {} as any;
+            const localVarQueryParameter = {} as any;
+
+
+    
+            localVarHeaderParameter['Content-Type'] = 'application/json';
+
+            setSearchParams(localVarUrlObj, localVarQueryParameter);
+            let headersFromBaseOptions = baseOptions && baseOptions.headers ? baseOptions.headers : {};
+            localVarRequestOptions.headers = {...localVarHeaderParameter, ...headersFromBaseOptions, ...options.headers};
+            localVarRequestOptions.data = serializeDataIfNeeded(body, localVarRequestOptions, configuration)
+
+            return {
+                url: toPathString(localVarUrlObj),
+                options: localVarRequestOptions,
+            };
+        },
         /**
          * Test empty json (request body)
          * @summary Test empty json (request body)
@@ -942,6 +976,19 @@ export const BodyApiFp = function(configuration?: Configuration) {
             const localVarOperationServerBasePath = operationServerMap['BodyApi.testEchoBodyPetResponseString']?.[localVarOperationServerIndex]?.url;
             return (axios, basePath) => createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration)(axios, localVarOperationServerBasePath || basePath);
         },
+        /**
+         * Test string enum response body
+         * @summary Test string enum response body
+         * @param {string} [body] String enum
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        async testEchoBodyStringEnum(body?: string, options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<StringEnumRef>> {
+            const localVarAxiosArgs = await localVarAxiosParamCreator.testEchoBodyStringEnum(body, options);
+            const localVarOperationServerIndex = configuration?.serverIndex ?? 0;
+            const localVarOperationServerBasePath = operationServerMap['BodyApi.testEchoBodyStringEnum']?.[localVarOperationServerIndex]?.url;
+            return (axios, basePath) => createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration)(axios, localVarOperationServerBasePath || basePath);
+        },
         /**
          * Test empty json (request body)
          * @summary Test empty json (request body)
@@ -1044,6 +1091,16 @@ export const BodyApiFactory = function (configuration?: Configuration, basePath?
         testEchoBodyPetResponseString(pet?: Pet, options?: any): AxiosPromise<string> {
             return localVarFp.testEchoBodyPetResponseString(pet, options).then((request) => request(axios, basePath));
         },
+        /**
+         * Test string enum response body
+         * @summary Test string enum response body
+         * @param {string} [body] String enum
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        testEchoBodyStringEnum(body?: string, options?: any): AxiosPromise<StringEnumRef> {
+            return localVarFp.testEchoBodyStringEnum(body, options).then((request) => request(axios, basePath));
+        },
         /**
          * Test empty json (request body)
          * @summary Test empty json (request body)
@@ -1159,6 +1216,18 @@ export class BodyApi extends BaseAPI {
         return BodyApiFp(this.configuration).testEchoBodyPetResponseString(pet, options).then((request) => request(this.axios, this.basePath));
     }
 
+    /**
+     * Test string enum response body
+     * @summary Test string enum response body
+     * @param {string} [body] String enum
+     * @param {*} [options] Override http request option.
+     * @throws {RequiredError}
+     * @memberof BodyApi
+     */
+    public testEchoBodyStringEnum(body?: string, options?: RawAxiosRequestConfig) {
+        return BodyApiFp(this.configuration).testEchoBodyStringEnum(body, options).then((request) => request(this.axios, this.basePath));
+    }
+
     /**
      * Test empty json (request body)
      * @summary Test empty json (request body)
diff --git a/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py b/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py
index 8111939439d..d25164f615d 100644
--- a/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py
+++ b/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py
@@ -14,6 +14,7 @@
 
 import datetime
 from dateutil.parser import parse
+from enum import Enum
 import json
 import mimetypes
 import os
@@ -432,6 +433,8 @@ class ApiClient:
             return self.__deserialize_date(data)
         elif klass == datetime.datetime:
             return self.__deserialize_datetime(data)
+        elif issubclass(klass, Enum):
+            return self.__deserialize_enum(data, klass)
         else:
             return self.__deserialize_model(data, klass)
 
@@ -736,6 +739,24 @@ class ApiClient:
                 )
             )
 
+    def __deserialize_enum(self, data, klass):
+        """Deserializes primitive type to enum.
+
+        :param data: primitive type.
+        :param klass: class literal.
+        :return: enum value.
+        """
+        try:
+            return klass(data)
+        except ValueError:
+            raise rest.ApiException(
+                status=0,
+                reason=(
+                    "Failed to parse `{0}` as `{1}`"
+                    .format(data, klass)
+                )
+            )
+
     def __deserialize_model(self, data, klass):
         """Deserializes list or dict to model.
 
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api_client.py b/samples/openapi3/client/petstore/python/petstore_api/api_client.py
index 3e20bad1ecc..74c58bcd35a 100755
--- a/samples/openapi3/client/petstore/python/petstore_api/api_client.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api_client.py
@@ -14,6 +14,7 @@
 
 import datetime
 from dateutil.parser import parse
+from enum import Enum
 import json
 import mimetypes
 import os
@@ -429,6 +430,8 @@ class ApiClient:
             return self.__deserialize_date(data)
         elif klass == datetime.datetime:
             return self.__deserialize_datetime(data)
+        elif issubclass(klass, Enum):
+            return self.__deserialize_enum(data, klass)
         else:
             return self.__deserialize_model(data, klass)
 
@@ -733,6 +736,24 @@ class ApiClient:
                 )
             )
 
+    def __deserialize_enum(self, data, klass):
+        """Deserializes primitive type to enum.
+
+        :param data: primitive type.
+        :param klass: class literal.
+        :return: enum value.
+        """
+        try:
+            return klass(data)
+        except ValueError:
+            raise rest.ApiException(
+                status=0,
+                reason=(
+                    "Failed to parse `{0}` as `{1}`"
+                    .format(data, klass)
+                )
+            )
+
     def __deserialize_model(self, data, klass):
         """Deserializes list or dict to model.