[python-nextgen] fix empty dict in body parameter (#15336)

* add more tests for python-nextgen

* update samples

* add fix for empty dict body

* update samples

modules/openapi-generator/src/main/resources/python-nextgen/api.mustache

@@ -236,7 +236,7 @@ class {{classname}}(object):
         # process the body parameter
         _body_params = None
 {{#bodyParam}}
-        if _params['{{paramName}}']:
+        if _params['{{paramName}}'] is not None:
             _body_params = _params['{{paramName}}']
 
 {{/bodyParam}}

modules/openapi-generator/src/test/resources/3_0/echo_api.yaml

@@ -351,6 +351,42 @@ paths:
             text/plain:
               schema:
                 type: string
+  /echo/body/Tag/response_string:
+    post:
+      tags:
+        - body
+      summary: Test empty json (request body)
+      description: Test empty json (request body)
+      operationId: test/echo/body/Tag/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Tag'
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            text/plain:
+              schema:
+                type: string
+  /echo/body/FreeFormObject/response_string:
+    post:
+      tags:
+        - body
+      summary: Test free form object
+      description: Test free form object
+      operationId: test/echo/body/FreeFormObject/response_string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+        description: Free form object
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            text/plain:
+              schema:
+                type: string
   /binary/gif:
     post:
       tags:
@@ -375,6 +411,12 @@ components:
           schema:
             $ref: '#/components/schemas/Pet'
       description: Pet object that needs to be added to the store
+    Tag:
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Tag'
+      description: Tag object
   schemas:
     Category:
       type: object

samples/client/echo_api/java/apache-httpclient/README.md

@@ -106,8 +106,10 @@ All URIs are relative to *http://localhost:3000*
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *BodyApi* | [**testBinaryGif**](docs/BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body
+*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* | [**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)
 *HeaderApi* | [**testHeaderIntegerBooleanString**](docs/HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s)
 *PathApi* | [**testsPathStringPathStringIntegerPathInteger**](docs/PathApi.md#testsPathStringPathStringIntegerPathInteger) | **GET** /path/string/{path_string}/integer/{path_integer} | Test path parameter(s)

samples/client/echo_api/java/apache-httpclient/api/openapi.yaml

@@ -349,6 +349,46 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/Tag/response_string:
+    post:
+      description: Test empty json (request body)
+      operationId: test/echo/body/Tag/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Tag'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty json (request body)
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
+  /echo/body/FreeFormObject/response_string:
+    post:
+      description: Test free form object
+      operationId: test/echo/body/FreeFormObject/response_string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+        description: Free form object
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test free form object
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -373,6 +413,12 @@ components:
           schema:
             $ref: '#/components/schemas/Pet'
       description: Pet object that needs to be added to the store
+    Tag:
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Tag'
+      description: Tag object
   schemas:
     Category:
       example:

samples/client/echo_api/java/apache-httpclient/docs/BodyApi.md

@@ -5,8 +5,10 @@ All URIs are relative to *http://localhost:3000*
 | Method | HTTP request | Description |
 |------------- | ------------- | -------------|
 | [**testBinaryGif**](BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body |
+| [**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 |
+| [**testEchoBodyTagResponseString**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
 
@@ -72,6 +74,72 @@ No authorization required
 | **200** | Successful operation |  -  |
 
 
+## testEchoBodyFreeFormObjectResponseString
+
+> String testEchoBodyFreeFormObjectResponseString(body)
+
+Test free form object
+
+Test free form object
+
+### 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);
+        Object body = null; // Object | Free form object
+        try {
+            String result = apiInstance.testEchoBodyFreeFormObjectResponseString(body);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyFreeFormObjectResponseString");
+            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** | **Object**| Free form object | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyPet
 
 > Pet testEchoBodyPet(pet)
@@ -203,3 +271,69 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testEchoBodyTagResponseString
+
+> String testEchoBodyTagResponseString(tag)
+
+Test empty json (request body)
+
+Test empty json (request 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);
+        Tag tag = new Tag(); // Tag | Tag object
+        try {
+            String result = apiInstance.testEchoBodyTagResponseString(tag);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyTagResponseString");
+            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 |
+|------------- | ------------- | ------------- | -------------|
+| **tag** | [**Tag**](Tag.md)| Tag object | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -22,6 +22,7 @@ import org.openapitools.client.Pair;
 
 import java.io.File;
 import org.openapitools.client.model.Pet;
+import org.openapitools.client.model.Tag;
 
 
 import java.util.ArrayList;
@@ -120,6 +121,75 @@ public class BodyApi {
     );
   }
 
+  /**
+   * Test free form object
+   * Test free form object
+   * @param body Free form object (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyFreeFormObjectResponseString(Object body) throws ApiException {
+    return this.testEchoBodyFreeFormObjectResponseString(body, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test free form object
+   * Test free form object
+   * @param body Free form object (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyFreeFormObjectResponseString(Object body, Map<String, String> additionalHeaders) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // create path and map variables
+    String localVarPath = "/echo/body/FreeFormObject/response_string";
+
+    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 = {
+      "text/plain"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<String> localVarReturnType = new TypeReference<String>() {};
+    return apiClient.invokeAPI(
+        localVarPath,
+        "POST",
+        localVarQueryParams,
+        localVarCollectionQueryParams,
+        localVarQueryStringJoiner.toString(),
+        localVarPostBody,
+        localVarHeaderParams,
+        localVarCookieParams,
+        localVarFormParams,
+        localVarAccept,
+        localVarContentType,
+        localVarAuthNames,
+        localVarReturnType
+    );
+  }
+
   /**
    * Test body parameter(s)
    * Test body parameter(s)
@@ -228,6 +298,75 @@ public class BodyApi {
 
     
     
+    final String[] localVarAccepts = {
+      "text/plain"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<String> localVarReturnType = new TypeReference<String>() {};
+    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)
+   * @param tag Tag object (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyTagResponseString(Tag tag) throws ApiException {
+    return this.testEchoBodyTagResponseString(tag, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test empty json (request body)
+   * Test empty json (request body)
+   * @param tag Tag object (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyTagResponseString(Tag tag, Map<String, String> additionalHeaders) throws ApiException {
+    Object localVarPostBody = tag;
+    
+    // create path and map variables
+    String localVarPath = "/echo/body/Tag/response_string";
+
+    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 = {
       "text/plain"
     };

samples/client/echo_api/java/feign-gson/api/openapi.yaml

@@ -349,6 +349,46 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/Tag/response_string:
+    post:
+      description: Test empty json (request body)
+      operationId: test/echo/body/Tag/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Tag'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty json (request body)
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
+  /echo/body/FreeFormObject/response_string:
+    post:
+      description: Test free form object
+      operationId: test/echo/body/FreeFormObject/response_string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+        description: Free form object
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test free form object
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -373,6 +413,12 @@ components:
           schema:
             $ref: '#/components/schemas/Pet'
       description: Pet object that needs to be added to the store
+    Tag:
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Tag'
+      description: Tag object
   schemas:
     Category:
       example:

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.Tag;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -42,6 +43,35 @@ public interface BodyApi extends ApiClient.Api {
 
 
 
+  /**
+   * Test free form object
+   * Test free form object
+   * @param body Free form object (optional)
+   * @return String
+   */
+  @RequestLine("POST /echo/body/FreeFormObject/response_string")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: text/plain",
+  })
+  String testEchoBodyFreeFormObjectResponseString(Object body);
+
+  /**
+   * Test free form object
+   * Similar to <code>testEchoBodyFreeFormObjectResponseString</code> but it also returns the http response headers .
+   * Test free form object
+   * @param body Free form object (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("POST /echo/body/FreeFormObject/response_string")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: text/plain",
+  })
+  ApiResponse<String> testEchoBodyFreeFormObjectResponseStringWithHttpInfo(Object body);
+
+
+
   /**
    * Test body parameter(s)
    * Test body parameter(s)
@@ -99,4 +129,33 @@ public interface BodyApi extends ApiClient.Api {
   ApiResponse<String> testEchoBodyPetResponseStringWithHttpInfo(Pet pet);
 
 
+
+  /**
+   * Test empty json (request body)
+   * Test empty json (request body)
+   * @param tag Tag object (optional)
+   * @return String
+   */
+  @RequestLine("POST /echo/body/Tag/response_string")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: text/plain",
+  })
+  String testEchoBodyTagResponseString(Tag tag);
+
+  /**
+   * Test empty json (request body)
+   * Similar to <code>testEchoBodyTagResponseString</code> but it also returns the http response headers .
+   * Test empty json (request body)
+   * @param tag Tag object (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("POST /echo/body/Tag/response_string")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: text/plain",
+  })
+  ApiResponse<String> testEchoBodyTagResponseStringWithHttpInfo(Tag tag);
+
+
 }

samples/client/echo_api/java/native/README.md

@@ -106,10 +106,14 @@ Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *BodyApi* | [**testBinaryGif**](docs/BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body
 *BodyApi* | [**testBinaryGifWithHttpInfo**](docs/BodyApi.md#testBinaryGifWithHttpInfo) | **POST** /binary/gif | Test binary (gif) response body
+*BodyApi* | [**testEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
+*BodyApi* | [**testEchoBodyFreeFormObjectResponseStringWithHttpInfo**](docs/BodyApi.md#testEchoBodyFreeFormObjectResponseStringWithHttpInfo) | **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* | [**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* | [**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)
 *FormApi* | [**testFormIntegerBooleanStringWithHttpInfo**](docs/FormApi.md#testFormIntegerBooleanStringWithHttpInfo) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *HeaderApi* | [**testHeaderIntegerBooleanString**](docs/HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s)

samples/client/echo_api/java/native/api/openapi.yaml

@@ -349,6 +349,46 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/Tag/response_string:
+    post:
+      description: Test empty json (request body)
+      operationId: test/echo/body/Tag/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Tag'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty json (request body)
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
+  /echo/body/FreeFormObject/response_string:
+    post:
+      description: Test free form object
+      operationId: test/echo/body/FreeFormObject/response_string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+        description: Free form object
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test free form object
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -373,6 +413,12 @@ components:
           schema:
             $ref: '#/components/schemas/Pet'
       description: Pet object that needs to be added to the store
+    Tag:
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Tag'
+      description: Tag object
   schemas:
     Category:
       example:

samples/client/echo_api/java/native/docs/BodyApi.md

@@ -6,10 +6,14 @@ All URIs are relative to *http://localhost:3000*
 |------------- | ------------- | -------------|
 | [**testBinaryGif**](BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body |
 | [**testBinaryGifWithHttpInfo**](BodyApi.md#testBinaryGifWithHttpInfo) | **POST** /binary/gif | Test binary (gif) response body |
+| [**testEchoBodyFreeFormObjectResponseString**](BodyApi.md#testEchoBodyFreeFormObjectResponseString) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
+| [**testEchoBodyFreeFormObjectResponseStringWithHttpInfo**](BodyApi.md#testEchoBodyFreeFormObjectResponseStringWithHttpInfo) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**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 |
+| [**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) |
 
 
 
@@ -139,6 +143,140 @@ No authorization required
 | **200** | Successful operation |  -  |
 
 
+## testEchoBodyFreeFormObjectResponseString
+
+> String testEchoBodyFreeFormObjectResponseString(body)
+
+Test free form object
+
+Test free form object
+
+### 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);
+        Object body = null; // Object | Free form object
+        try {
+            String result = apiInstance.testEchoBodyFreeFormObjectResponseString(body);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyFreeFormObjectResponseString");
+            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** | **Object**| Free form object | [optional] |
+
+### Return type
+
+**String**
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testEchoBodyFreeFormObjectResponseStringWithHttpInfo
+
+> ApiResponse<String> testEchoBodyFreeFormObjectResponseString testEchoBodyFreeFormObjectResponseStringWithHttpInfo(body)
+
+Test free form object
+
+Test free form object
+
+### 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);
+        Object body = null; // Object | Free form object
+        try {
+            ApiResponse<String> response = apiInstance.testEchoBodyFreeFormObjectResponseStringWithHttpInfo(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#testEchoBodyFreeFormObjectResponseString");
+            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** | **Object**| Free form object | [optional] |
+
+### Return type
+
+ApiResponse<**String**>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyPet
 
 > Pet testEchoBodyPet(pet)
@@ -406,3 +544,137 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testEchoBodyTagResponseString
+
+> String testEchoBodyTagResponseString(tag)
+
+Test empty json (request body)
+
+Test empty json (request 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);
+        Tag tag = new Tag(); // Tag | Tag object
+        try {
+            String result = apiInstance.testEchoBodyTagResponseString(tag);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyTagResponseString");
+            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 |
+|------------- | ------------- | ------------- | -------------|
+| **tag** | [**Tag**](Tag.md)| Tag object | [optional] |
+
+### Return type
+
+**String**
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testEchoBodyTagResponseStringWithHttpInfo
+
+> ApiResponse<String> testEchoBodyTagResponseString testEchoBodyTagResponseStringWithHttpInfo(tag)
+
+Test empty json (request body)
+
+Test empty json (request 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);
+        Tag tag = new Tag(); // Tag | Tag object
+        try {
+            ApiResponse<String> response = apiInstance.testEchoBodyTagResponseStringWithHttpInfo(tag);
+            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#testEchoBodyTagResponseString");
+            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 |
+|------------- | ------------- | ------------- | -------------|
+| **tag** | [**Tag**](Tag.md)| Tag object | [optional] |
+
+### Return type
+
+ApiResponse<**String**>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

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.Tag;
 
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -147,6 +148,87 @@ public class BodyApi {
     }
     return localVarRequestBuilder;
   }
+  /**
+   * Test free form object
+   * Test free form object
+   * @param body Free form object (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyFreeFormObjectResponseString(Object body) throws ApiException {
+    ApiResponse<String> localVarResponse = testEchoBodyFreeFormObjectResponseStringWithHttpInfo(body);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test free form object
+   * Test free form object
+   * @param body Free form object (optional)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testEchoBodyFreeFormObjectResponseStringWithHttpInfo(Object body) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testEchoBodyFreeFormObjectResponseStringRequestBuilder(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("testEchoBodyFreeFormObjectResponseString", localVarResponse);
+        }
+        // for plain text response
+        if (localVarResponse.headers().map().containsKey("Content-Type") &&
+                "text/plain".equalsIgnoreCase(localVarResponse.headers().map().get("Content-Type").get(0))) {
+          java.util.Scanner s = new java.util.Scanner(localVarResponse.body()).useDelimiter("\\A");
+          String responseBodyText = s.hasNext() ? s.next() : "";
+          return new ApiResponse<String>(
+                  localVarResponse.statusCode(),
+                  localVarResponse.headers().map(),
+                  responseBodyText
+          );
+        } else {
+            throw new RuntimeException("Error! The response Content-Type is supposed to be `text/plain` but it's not: " + localVarResponse);
+        }
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testEchoBodyFreeFormObjectResponseStringRequestBuilder(Object body) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/echo/body/FreeFormObject/response_string";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Content-Type", "application/json");
+    localVarRequestBuilder.header("Accept", "text/plain");
+
+    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 body parameter(s)
    * Test body parameter(s)
@@ -301,4 +383,85 @@ public class BodyApi {
     }
     return localVarRequestBuilder;
   }
+  /**
+   * Test empty json (request body)
+   * Test empty json (request body)
+   * @param tag Tag object (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyTagResponseString(Tag tag) throws ApiException {
+    ApiResponse<String> localVarResponse = testEchoBodyTagResponseStringWithHttpInfo(tag);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test empty json (request body)
+   * Test empty json (request body)
+   * @param tag Tag object (optional)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testEchoBodyTagResponseStringWithHttpInfo(Tag tag) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testEchoBodyTagResponseStringRequestBuilder(tag);
+    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("testEchoBodyTagResponseString", localVarResponse);
+        }
+        // for plain text response
+        if (localVarResponse.headers().map().containsKey("Content-Type") &&
+                "text/plain".equalsIgnoreCase(localVarResponse.headers().map().get("Content-Type").get(0))) {
+          java.util.Scanner s = new java.util.Scanner(localVarResponse.body()).useDelimiter("\\A");
+          String responseBodyText = s.hasNext() ? s.next() : "";
+          return new ApiResponse<String>(
+                  localVarResponse.statusCode(),
+                  localVarResponse.headers().map(),
+                  responseBodyText
+          );
+        } else {
+            throw new RuntimeException("Error! The response Content-Type is supposed to be `text/plain` but it's not: " + localVarResponse);
+        }
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testEchoBodyTagResponseStringRequestBuilder(Tag tag) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/echo/body/Tag/response_string";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Content-Type", "application/json");
+    localVarRequestBuilder.header("Accept", "text/plain");
+
+    try {
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(tag);
+      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;
+  }
 }

samples/client/echo_api/java/okhttp-gson/README.md

@@ -113,8 +113,10 @@ All URIs are relative to *http://localhost:3000*
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *BodyApi* | [**testBinaryGif**](docs/BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body
+*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* | [**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)
 *HeaderApi* | [**testHeaderIntegerBooleanString**](docs/HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s)
 *PathApi* | [**testsPathStringPathStringIntegerPathInteger**](docs/PathApi.md#testsPathStringPathStringIntegerPathInteger) | **GET** /path/string/{path_string}/integer/{path_integer} | Test path parameter(s)

samples/client/echo_api/java/okhttp-gson/api/openapi.yaml

@@ -349,6 +349,46 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /echo/body/Tag/response_string:
+    post:
+      description: Test empty json (request body)
+      operationId: test/echo/body/Tag/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Tag'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty json (request body)
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
+  /echo/body/FreeFormObject/response_string:
+    post:
+      description: Test free form object
+      operationId: test/echo/body/FreeFormObject/response_string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+        description: Free form object
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test free form object
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -373,6 +413,12 @@ components:
           schema:
             $ref: '#/components/schemas/Pet'
       description: Pet object that needs to be added to the store
+    Tag:
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Tag'
+      description: Tag object
   schemas:
     Category:
       example:

samples/client/echo_api/java/okhttp-gson/docs/BodyApi.md

@@ -5,8 +5,10 @@ All URIs are relative to *http://localhost:3000*
 | Method | HTTP request | Description |
 |------------- | ------------- | -------------|
 | [**testBinaryGif**](BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body |
+| [**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 |
+| [**testEchoBodyTagResponseString**](BodyApi.md#testEchoBodyTagResponseString) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 
 <a name="testBinaryGif"></a>
@@ -67,6 +69,68 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+<a name="testEchoBodyFreeFormObjectResponseString"></a>
+# **testEchoBodyFreeFormObjectResponseString**
+> String testEchoBodyFreeFormObjectResponseString(body)
+
+Test free form object
+
+Test free form object
+
+### 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);
+    Object body = null; // Object | Free form object
+    try {
+      String result = apiInstance.testEchoBodyFreeFormObjectResponseString(body);
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling BodyApi#testEchoBodyFreeFormObjectResponseString");
+      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** | **Object**| Free form object | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
 <a name="testEchoBodyPet"></a>
 # **testEchoBodyPet**
 > Pet testEchoBodyPet(pet)
@@ -191,3 +255,65 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+<a name="testEchoBodyTagResponseString"></a>
+# **testEchoBodyTagResponseString**
+> String testEchoBodyTagResponseString(tag)
+
+Test empty json (request body)
+
+Test empty json (request 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);
+    Tag tag = new Tag(); // Tag | Tag object
+    try {
+      String result = apiInstance.testEchoBodyTagResponseString(tag);
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling BodyApi#testEchoBodyTagResponseString");
+      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 |
+|------------- | ------------- | ------------- | -------------|
+| **tag** | [**Tag**](Tag.md)| Tag object | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

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.Tag;
 
 import java.lang.reflect.Type;
 import java.util.ArrayList;
@@ -187,6 +188,124 @@ public class BodyApi {
         localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
         return localVarCall;
     }
+    /**
+     * Build call for testEchoBodyFreeFormObjectResponseString
+     * @param body Free form object (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 testEchoBodyFreeFormObjectResponseStringCall(Object 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/FreeFormObject/response_string";
+
+        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 = {
+            "text/plain"
+        };
+        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 testEchoBodyFreeFormObjectResponseStringValidateBeforeCall(Object body, final ApiCallback _callback) throws ApiException {
+        return testEchoBodyFreeFormObjectResponseStringCall(body, _callback);
+
+    }
+
+    /**
+     * Test free form object
+     * Test free form object
+     * @param body Free form object (optional)
+     * @return String
+     * @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 String testEchoBodyFreeFormObjectResponseString(Object body) throws ApiException {
+        ApiResponse<String> localVarResp = testEchoBodyFreeFormObjectResponseStringWithHttpInfo(body);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test free form object
+     * Test free form object
+     * @param body Free form object (optional)
+     * @return ApiResponse&lt;String&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<String> testEchoBodyFreeFormObjectResponseStringWithHttpInfo(Object body) throws ApiException {
+        okhttp3.Call localVarCall = testEchoBodyFreeFormObjectResponseStringValidateBeforeCall(body, null);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test free form object (asynchronously)
+     * Test free form object
+     * @param body Free form object (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 testEchoBodyFreeFormObjectResponseStringAsync(Object body, final ApiCallback<String> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testEchoBodyFreeFormObjectResponseStringValidateBeforeCall(body, _callback);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
     /**
      * Build call for testEchoBodyPet
      * @param pet Pet object that needs to be added to the store (optional)
@@ -423,4 +542,122 @@ public class BodyApi {
         localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
         return localVarCall;
     }
+    /**
+     * Build call for testEchoBodyTagResponseString
+     * @param tag Tag object (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 testEchoBodyTagResponseStringCall(Tag tag, 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 = tag;
+
+        // create path and map variables
+        String localVarPath = "/echo/body/Tag/response_string";
+
+        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 = {
+            "text/plain"
+        };
+        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 testEchoBodyTagResponseStringValidateBeforeCall(Tag tag, final ApiCallback _callback) throws ApiException {
+        return testEchoBodyTagResponseStringCall(tag, _callback);
+
+    }
+
+    /**
+     * Test empty json (request body)
+     * Test empty json (request body)
+     * @param tag Tag object (optional)
+     * @return String
+     * @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 String testEchoBodyTagResponseString(Tag tag) throws ApiException {
+        ApiResponse<String> localVarResp = testEchoBodyTagResponseStringWithHttpInfo(tag);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test empty json (request body)
+     * Test empty json (request body)
+     * @param tag Tag object (optional)
+     * @return ApiResponse&lt;String&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<String> testEchoBodyTagResponseStringWithHttpInfo(Tag tag) throws ApiException {
+        okhttp3.Call localVarCall = testEchoBodyTagResponseStringValidateBeforeCall(tag, null);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test empty json (request body) (asynchronously)
+     * Test empty json (request body)
+     * @param tag Tag object (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 testEchoBodyTagResponseStringAsync(Tag tag, final ApiCallback<String> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testEchoBodyTagResponseStringValidateBeforeCall(tag, _callback);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
 }

samples/client/echo_api/python-nextgen/README.md

@@ -86,8 +86,10 @@ All URIs are relative to *http://localhost:3000*
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *BodyApi* | [**test_binary_gif**](docs/BodyApi.md#test_binary_gif) | **POST** /binary/gif | Test binary (gif) response body
+*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_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)
 *HeaderApi* | [**test_header_integer_boolean_string**](docs/HeaderApi.md#test_header_integer_boolean_string) | **GET** /header/integer/boolean/string | Test header parameter(s)
 *PathApi* | [**tests_path_string_path_string_integer_path_integer**](docs/PathApi.md#tests_path_string_path_string_integer_path_integer) | **GET** /path/string/{path_string}/integer/{path_integer} | Test path parameter(s)

samples/client/echo_api/python-nextgen/docs/BodyApi.md

@@ -5,8 +5,10 @@ All URIs are relative to *http://localhost:3000*
 Method | HTTP request | Description
 ------------- | ------------- | -------------
 [**test_binary_gif**](BodyApi.md#test_binary_gif) | **POST** /binary/gif | Test binary (gif) response body
+[**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_tag_response_string**](BodyApi.md#test_echo_body_tag_response_string) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 
 
 # **test_binary_gif**
@@ -70,6 +72,71 @@ 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_free_form_object_response_string**
+> str test_echo_body_free_form_object_response_string(body=body)
+
+Test free form object
+
+Test free form object
+
+### Example
+
+```python
+import time
+import os
+import openapi_client
+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 = None # object | Free form object (optional)
+
+    try:
+        # Test free form object
+        api_response = api_instance.test_echo_body_free_form_object_response_string(body=body)
+        print("The response of BodyApi->test_echo_body_free_form_object_response_string:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling BodyApi->test_echo_body_free_form_object_response_string: %s\n" % e)
+```
+
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | **object**| Free form object | [optional] 
+
+### Return type
+
+**str**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **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)
+
 # **test_echo_body_pet**
 > Pet test_echo_body_pet(pet=pet)
 
@@ -202,3 +269,69 @@ 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_tag_response_string**
+> str test_echo_body_tag_response_string(tag=tag)
+
+Test empty json (request body)
+
+Test empty json (request body)
+
+### Example
+
+```python
+import time
+import os
+import openapi_client
+from openapi_client.models.tag import Tag
+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)
+    tag = openapi_client.Tag() # Tag | Tag object (optional)
+
+    try:
+        # Test empty json (request body)
+        api_response = api_instance.test_echo_body_tag_response_string(tag=tag)
+        print("The response of BodyApi->test_echo_body_tag_response_string:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling BodyApi->test_echo_body_tag_response_string: %s\n" % e)
+```
+
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **tag** | [**Tag**](Tag.md)| Tag object | [optional] 
+
+### Return type
+
+**str**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **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)
+

samples/client/echo_api/python-nextgen/openapi_client/api/body_api.py

@@ -20,9 +20,10 @@ from typing_extensions import Annotated
 
 from pydantic import Field
 
-from typing import Optional
+from typing import Any, Dict, Optional
 
 from openapi_client.models.pet import Pet
+from openapi_client.models.tag import Tag
 
 from openapi_client.api_client import ApiClient
 from openapi_client.exceptions import (  # noqa: F401
@@ -175,6 +176,153 @@ class BodyApi(object):
             collection_formats=_collection_formats,
             _request_auth=_params.get('_request_auth'))
 
+    @validate_arguments
+    def test_echo_body_free_form_object_response_string(self, body : Annotated[Optional[Dict[str, Any]], Field(description="Free form object")] = None, **kwargs) -> str:  # noqa: E501
+        """Test free form object  # noqa: E501
+
+        Test free form object  # 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_free_form_object_response_string(body, async_req=True)
+        >>> result = thread.get()
+
+        :param body: Free form object
+        :type body: object
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _preload_content: if False, the urllib3.HTTPResponse object will
+                                 be returned without reading/decoding response
+                                 data. Default is True.
+        :type _preload_content: 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: str
+        """
+        kwargs['_return_http_data_only'] = True
+        return self.test_echo_body_free_form_object_response_string_with_http_info(body, **kwargs)  # noqa: E501
+
+    @validate_arguments
+    def test_echo_body_free_form_object_response_string_with_http_info(self, body : Annotated[Optional[Dict[str, Any]], Field(description="Free form object")] = None, **kwargs):  # noqa: E501
+        """Test free form object  # noqa: E501
+
+        Test free form object  # 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_free_form_object_response_string_with_http_info(body, async_req=True)
+        >>> result = thread.get()
+
+        :param body: Free form object
+        :type body: object
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _return_http_data_only: response data without head status code
+                                       and headers
+        :type _return_http_data_only: bool, optional
+        :param _preload_content: if False, the urllib3.HTTPResponse object will
+                                 be returned without reading/decoding response
+                                 data. Default is True.
+        :type _preload_content: 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(str, 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_free_form_object_response_string" % _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(
+            ['text/plain'])  # 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': "str",
+        }
+
+        return self.api_client.call_api(
+            '/echo/body/FreeFormObject/response_string', '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_pet(self, pet : Annotated[Optional[Pet], Field(description="Pet object that needs to be added to the store")] = None, **kwargs) -> Pet:  # noqa: E501
         """Test body parameter(s)  # noqa: E501
@@ -284,7 +432,7 @@ class BodyApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Accept`
@@ -431,7 +579,7 @@ class BodyApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Accept`
@@ -468,3 +616,150 @@ class BodyApi(object):
             _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
+
+        Test empty json (request 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_tag_response_string(tag, async_req=True)
+        >>> result = thread.get()
+
+        :param tag: Tag object
+        :type tag: Tag
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _preload_content: if False, the urllib3.HTTPResponse object will
+                                 be returned without reading/decoding response
+                                 data. Default is True.
+        :type _preload_content: 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: str
+        """
+        kwargs['_return_http_data_only'] = True
+        return self.test_echo_body_tag_response_string_with_http_info(tag, **kwargs)  # noqa: E501
+
+    @validate_arguments
+    def test_echo_body_tag_response_string_with_http_info(self, tag : Annotated[Optional[Tag], Field(description="Tag object")] = None, **kwargs):  # noqa: E501
+        """Test empty json (request body)  # noqa: E501
+
+        Test empty json (request 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_tag_response_string_with_http_info(tag, async_req=True)
+        >>> result = thread.get()
+
+        :param tag: Tag object
+        :type tag: Tag
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _return_http_data_only: response data without head status code
+                                       and headers
+        :type _return_http_data_only: bool, optional
+        :param _preload_content: if False, the urllib3.HTTPResponse object will
+                                 be returned without reading/decoding response
+                                 data. Default is True.
+        :type _preload_content: 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(str, status_code(int), headers(HTTPHeaderDict))
+        """
+
+        _params = locals()
+
+        _all_params = [
+            'tag'
+        ]
+        _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_tag_response_string" % _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['tag'] is not None:
+            _body_params = _params['tag']
+
+        # set the HTTP header `Accept`
+        _header_params['Accept'] = self.api_client.select_header_accept(
+            ['text/plain'])  # 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': "str",
+        }
+
+        return self.api_client.call_api(
+            '/echo/body/Tag/response_string', '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'))

samples/client/echo_api/python-nextgen/test/test_manual.py

@@ -84,6 +84,38 @@ class TestManual(unittest.TestCase):
         self.assertEqual(n.float, 456.2)
         self.assertEqual(n.double, 34.3)
 
+    def testBodyParameter(self):
+        n = openapi_client.Pet.from_dict({"name": "testing", "photoUrls": ["http://1", "http://2"]})
+        api_instance = openapi_client.BodyApi()
+        api_response = api_instance.test_echo_body_pet_response_string(n)
+        self.assertEqual(api_response, "{'name': 'testing', 'photoUrls': ['http://1', 'http://2']}")
+
+        t = openapi_client.Tag()
+        api_response = api_instance.test_echo_body_tag_response_string(t)
+        self.assertEqual(api_response, "{}") # assertion to ensure {} is sent in the body
+
+        api_response = api_instance.test_echo_body_tag_response_string(None)
+        self.assertEqual(api_response, "") # assertion to ensure emtpy string is sent in the body
+
+        api_response = api_instance.test_echo_body_free_form_object_response_string({})
+        self.assertEqual(api_response, "{}") # assertion to ensure {} is sent in the body
+
+    def echoServerResponseParaserTest(self):
+        s = """POST /echo/body/Pet/response_string HTTP/1.1
+Host: localhost:3000
+Accept-Encoding: identity
+Content-Length: 58
+Accept: text/plain
+Content-Type: application/json
+User-Agent: OpenAPI-Generator/1.0.0/python
+
+{"name": "testing", "photoUrls": ["http://1", "http://2"]}"""
+        e = EchoServerResponseParser(s)
+        self.assertEqual(e.body, '{"name": "testing", "photoUrls": ["http://1", "http://2"]}')
+        self.assertEqual(e.path, '/echo/body/Pet/response_string')
+        self.assertEqual(e.headers["Accept"], 'text/plain')
+        self.assertEqual(e.method, 'POST')
+
 class EchoServerResponseParser():
     def __init__(self, http_response):
         if http_response is None:
@@ -100,6 +132,7 @@ class EchoServerResponseParser():
                 self.protocol = items[2];
             elif lines[x] == "": # blank line
                 self.body = "\n".join(lines[x:])
+                break
             else:
                 key_value = lines[x].split(": ")
                 # store the header key-value pair in headers

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/api/another_fake_api.py

@@ -160,7 +160,7 @@ class AnotherFakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['client']:
+        if _params['client'] is not None:
             _body_params = _params['client']
 
         # set the HTTP header `Accept`

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/api/fake_api.py

@@ -169,7 +169,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Content-Type`
@@ -616,7 +616,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Content-Type`
@@ -767,7 +767,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Accept`
@@ -924,7 +924,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['outer_composite']:
+        if _params['outer_composite'] is not None:
             _body_params = _params['outer_composite']
 
         # set the HTTP header `Accept`
@@ -1081,7 +1081,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Accept`
@@ -1238,7 +1238,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Accept`
@@ -1395,7 +1395,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['outer_object_with_enum_property']:
+        if _params['outer_object_with_enum_property'] is not None:
             _body_params = _params['outer_object_with_enum_property']
 
         # set the HTTP header `Accept`
@@ -1552,7 +1552,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Content-Type`
@@ -1703,7 +1703,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['file_schema_test_class']:
+        if _params['file_schema_test_class'] is not None:
             _body_params = _params['file_schema_test_class']
 
         # set the HTTP header `Content-Type`
@@ -1860,7 +1860,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -2011,7 +2011,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['client']:
+        if _params['client'] is not None:
             _body_params = _params['client']
 
         # set the HTTP header `Accept`
@@ -2760,7 +2760,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['request_body']:
+        if _params['request_body'] is not None:
             _body_params = _params['request_body']
 
         # set the HTTP header `Content-Type`

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/api/fake_classname_tags123_api.py

@@ -160,7 +160,7 @@ class FakeClassnameTags123Api(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['client']:
+        if _params['client'] is not None:
             _body_params = _params['client']
 
         # set the HTTP header `Accept`

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/api/pet_api.py

@@ -163,7 +163,7 @@ class PetApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Content-Type`
@@ -922,7 +922,7 @@ class PetApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Content-Type`

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/api/store_api.py

@@ -600,7 +600,7 @@ class StoreApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['order']:
+        if _params['order'] is not None:
             _body_params = _params['order']
 
         # set the HTTP header `Accept`

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/api/user_api.py

@@ -174,7 +174,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -326,7 +326,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -477,7 +477,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -1227,7 +1227,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`

samples/openapi3/client/petstore/python-nextgen/petstore_api/api/another_fake_api.py

@@ -149,7 +149,7 @@ class AnotherFakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['client']:
+        if _params['client'] is not None:
             _body_params = _params['client']
 
         # set the HTTP header `Accept`

samples/openapi3/client/petstore/python-nextgen/petstore_api/api/fake_api.py

@@ -158,7 +158,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Content-Type`
@@ -575,7 +575,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Content-Type`
@@ -716,7 +716,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Accept`
@@ -863,7 +863,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['outer_composite']:
+        if _params['outer_composite'] is not None:
             _body_params = _params['outer_composite']
 
         # set the HTTP header `Accept`
@@ -1010,7 +1010,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Accept`
@@ -1157,7 +1157,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Accept`
@@ -1304,7 +1304,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['outer_object_with_enum_property']:
+        if _params['outer_object_with_enum_property'] is not None:
             _body_params = _params['outer_object_with_enum_property']
 
         # set the HTTP header `Accept`
@@ -1451,7 +1451,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['body']:
+        if _params['body'] is not None:
             _body_params = _params['body']
 
         # set the HTTP header `Content-Type`
@@ -1592,7 +1592,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['file_schema_test_class']:
+        if _params['file_schema_test_class'] is not None:
             _body_params = _params['file_schema_test_class']
 
         # set the HTTP header `Content-Type`
@@ -1739,7 +1739,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -1880,7 +1880,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['client']:
+        if _params['client'] is not None:
             _body_params = _params['client']
 
         # set the HTTP header `Accept`
@@ -2589,7 +2589,7 @@ class FakeApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['request_body']:
+        if _params['request_body'] is not None:
             _body_params = _params['request_body']
 
         # set the HTTP header `Content-Type`

samples/openapi3/client/petstore/python-nextgen/petstore_api/api/fake_classname_tags123_api.py

@@ -149,7 +149,7 @@ class FakeClassnameTags123Api(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['client']:
+        if _params['client'] is not None:
             _body_params = _params['client']
 
         # set the HTTP header `Accept`

samples/openapi3/client/petstore/python-nextgen/petstore_api/api/pet_api.py

@@ -152,7 +152,7 @@ class PetApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Content-Type`
@@ -861,7 +861,7 @@ class PetApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['pet']:
+        if _params['pet'] is not None:
             _body_params = _params['pet']
 
         # set the HTTP header `Content-Type`

samples/openapi3/client/petstore/python-nextgen/petstore_api/api/store_api.py

@@ -559,7 +559,7 @@ class StoreApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['order']:
+        if _params['order'] is not None:
             _body_params = _params['order']
 
         # set the HTTP header `Accept`

samples/openapi3/client/petstore/python-nextgen/petstore_api/api/user_api.py

@@ -163,7 +163,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -305,7 +305,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -446,7 +446,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`
@@ -1146,7 +1146,7 @@ class UserApi(object):
         _files = {}
         # process the body parameter
         _body_params = None
-        if _params['user']:
+        if _params['user'] is not None:
             _body_params = _params['user']
 
         # set the HTTP header `Content-Type`