Fix bug in ModelUtils.getParentName resulting in wrong inner Models for oneOf-composed schemas (#21799)

* Test Cases for more than two oneOf-Options (both passing, but important to narrow down observed bug)

* fix language-specific tests broken by adding a third fruit to oneOf test

* create reproducer unit test for java client codegen

* fix typo in test yaml

* fix ModelUtils.getParentName returning name of first element in composed schema instead of null when there are multiple elements and it is not clear which one should be parent

* rename test yaml and added tests for clarity

* update samples

* update samples again

modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java

@@ -1573,6 +1573,7 @@ public class ModelUtils {
         List<String> refedWithoutDiscriminator = new ArrayList<>();
 
         if (interfaces != null && !interfaces.isEmpty()) {
+            List<String> parentNameCandidates = new ArrayList<>(interfaces.size());
             for (Schema schema : interfaces) {
                 // get the actual schema
                 if (StringUtils.isNotEmpty(schema.get$ref())) {
@@ -1580,10 +1581,10 @@ public class ModelUtils {
                     Schema s = allSchemas.get(parentName);
                     if (s == null) {
                         LOGGER.error("Failed to obtain schema from {}", parentName);
-                        return "UNKNOWN_PARENT_NAME";
+                        parentNameCandidates.add("UNKNOWN_PARENT_NAME");
                     } else if (hasOrInheritsDiscriminator(s, allSchemas, new ArrayList<Schema>())) {
                         // discriminator.propertyName is used or x-parent is used
-                        return parentName;
+                        parentNameCandidates.add(parentName);
                     } else {
                         // not a parent since discriminator.propertyName or x-parent is not set
                         hasAmbiguousParents = true;
@@ -1600,6 +1601,12 @@ public class ModelUtils {
                     }
                 }
             }
+            if (parentNameCandidates.size() > 1) {
+                // unclear which one should be the parent
+                return null;
+            } else if (parentNameCandidates.size() == 1) {
+                return parentNameCandidates.get(0);
+            }
             if (refedWithoutDiscriminator.size() == 1 && nullSchemaChildrenCount == 1) {
                 // One schema is a $ref and the other is the 'null' type, so the parent is obvious.
                 // In this particular case there is no need to specify a discriminator.

modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java

@@ -766,9 +766,10 @@ public class DefaultCodegenTest {
         Set<String> oneOf = new TreeSet<>();
         oneOf.add("Apple");
         oneOf.add("Banana");
+        oneOf.add("Orange");
         assertEquals(fruit.oneOf, oneOf);
-        assertEquals(3, fruit.optionalVars.size());
+        assertEquals(4, fruit.optionalVars.size());
-        assertEquals(3, fruit.vars.size());
+        assertEquals(4, fruit.vars.size());
         // make sure that fruit has the property color
         boolean colorSeen = false;
         for (CodegenProperty cp : fruit.vars) {
@@ -788,6 +789,32 @@ public class DefaultCodegenTest {
         assertTrue(colorSeen);
     }
 
+    @Test
+    public void testComposedSchemaOneOfWithInnerModel() {
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/oneOf_innerModel.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+
+        final Schema schema = openAPI.getComponents().getSchemas().get("RandomAnimalsResponse_animals_inner");
+        codegen.setOpenAPI(openAPI);
+        CodegenModel randomAnimalsResponseInner = codegen.fromModel("RandomAnimalsResponse_animals_inner", schema);
+
+        Set<String> oneOf = new TreeSet<>();
+        oneOf.add("Mouse");
+        oneOf.add("Cat");
+        oneOf.add("Dog");
+        assertEquals(oneOf, randomAnimalsResponseInner.oneOf);
+        assertEquals(4, randomAnimalsResponseInner.vars.size());
+        // make sure that RandomAnimalsResponseInner has the property species
+        boolean speciesSeen = false;
+        for (CodegenProperty cp : randomAnimalsResponseInner.vars) {
+            if ("species".equals(cp.name)) {
+                speciesSeen = true;
+                break;
+            }
+        }
+        assertTrue(speciesSeen);
+    }
+
     @Test
     public void testEscapeText() {
         final DefaultCodegen codegen = new DefaultCodegen();

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/JavaClientCodegenTest.java

@@ -40,12 +40,14 @@ import org.openapitools.codegen.config.CodegenConfigurator;
 import org.openapitools.codegen.java.assertions.JavaFileAssert;
 import org.openapitools.codegen.languages.AbstractJavaCodegen;
 import org.openapitools.codegen.languages.JavaClientCodegen;
+import org.openapitools.codegen.languages.RubyClientCodegen;
 import org.openapitools.codegen.languages.features.BeanValidationFeatures;
 import org.openapitools.codegen.languages.features.CXFServerFeatures;
 import org.openapitools.codegen.meta.features.SecurityFeature;
 import org.openapitools.codegen.model.OperationMap;
 import org.openapitools.codegen.model.OperationsMap;
 import org.openapitools.codegen.testutils.ConfigAssert;
+import org.testng.Assert;
 import org.testng.annotations.DataProvider;
 import org.testng.annotations.Parameters;
 import org.testng.annotations.Test;
@@ -67,6 +69,8 @@ import java.util.stream.Collectors;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.entry;
 import static org.assertj.core.api.InstanceOfAssertFactories.FILE;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.openapitools.codegen.CodegenConstants.*;
 import static org.openapitools.codegen.TestUtils.*;
 import static org.openapitools.codegen.languages.JavaClientCodegen.*;
@@ -3837,4 +3841,49 @@ public class JavaClientCodegenTest {
     public static Object[] springClients() {
         return new Object[]{RESTCLIENT, WEBCLIENT};
     }
+
+    @Test(description = "test oneOf (OAS3)")
+    public void oneOfTest() {
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/oneOf.yaml");
+        final JavaClientCodegen codegen = new JavaClientCodegen();
+
+        final Schema schema = openAPI.getComponents().getSchemas().get("fruit");
+        codegen.setOpenAPI(openAPI);
+        CodegenModel fruit = codegen.fromModel("Fruit", schema);
+
+        Set<String> oneOf = new TreeSet<String>();
+        oneOf.add("Apple");
+        oneOf.add("Banana");
+        oneOf.add("Orange");
+        Assert.assertEquals(fruit.oneOf, oneOf);
+
+        assertEquals(4, fruit.optionalVars.size());
+        assertEquals(4, fruit.vars.size());
+    }
+
+    @Test
+    public void oneOfWithInnerModelTest() {
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/oneOf_innerModel.yaml");
+        final JavaClientCodegen codegen = new JavaClientCodegen();
+
+        final Schema schema = openAPI.getComponents().getSchemas().get("RandomAnimalsResponse_animals_inner");
+        codegen.setOpenAPI(openAPI);
+        CodegenModel randomAnimalsResponseInner = codegen.fromModel("RandomAnimalsResponse_animals_inner", schema);
+
+        Set<String> oneOf = new TreeSet<>();
+        oneOf.add("Mouse");
+        oneOf.add("Cat");
+        oneOf.add("Dog");
+        assertEquals(oneOf, randomAnimalsResponseInner.oneOf);
+        assertEquals(4, randomAnimalsResponseInner.vars.size());
+        // make sure that RandomAnimalsResponseInner has the property species
+        boolean speciesSeen = false;
+        for (CodegenProperty cp : randomAnimalsResponseInner.vars) {
+            if ("species".equals(cp.name)) {
+                speciesSeen = true;
+                break;
+            }
+        }
+        assertTrue(speciesSeen);
+    }
 }

modules/openapi-generator/src/test/java/org/openapitools/codegen/ruby/RubyClientCodegenTest.java

@@ -368,6 +368,7 @@ public class RubyClientCodegenTest {
         Set<String> oneOf = new TreeSet<String>();
         oneOf.add("Apple");
         oneOf.add("Banana");
+        oneOf.add("Orange");
         Assert.assertEquals(fruit.oneOf, oneOf);
     }
 

modules/openapi-generator/src/test/java/org/openapitools/codegen/utils/ModelUtilsTest.java

@@ -675,4 +675,12 @@ public class ModelUtilsTest {
         testSchema.setAdditionalProperties(new Schema().type("string"));
         assertFalse(ModelUtils.isModelWithPropertiesOnly(testSchema));
     }
+
+    @Test
+    public void getParentNameMultipleInterfacesTest() {
+        OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/oneOf_innerModel.yaml");
+        Map<String, Schema> allSchemas = openAPI.getComponents().getSchemas();
+        Schema composedSchema = allSchemas.get("RandomAnimalsResponse_animals_inner");
+        assertNull(ModelUtils.getParentName(composedSchema, allSchemas));
+    }
 }

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

@@ -22,6 +22,7 @@ components:
          oneOf:
             - $ref: '#/components/schemas/apple'
             - $ref: '#/components/schemas/banana'
+            - $ref: '#/components/schemas/orange'
          # additionalProperties:
          #    type: string
          # uncomment this when https://github.com/swagger-api/swagger-parser/issues/1252 is resolved
@@ -37,3 +38,9 @@ components:
          properties:
             count:
                type: number
+      orange:
+         title: orange
+         type: object
+         properties:
+            sweet:
+               type: boolean

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

@@ -0,0 +1,70 @@
+---
+openapi: 3.0.3
+info:
+  title: randimals
+  version: "1.0"
+paths:
+  /random-animals:
+    get:
+      tags:
+        - Random Animals Resource
+      responses:
+        "200":
+          description: OK
+          content:
+            '*/*':
+              schema:
+                $ref: '#/components/schemas/RandomAnimalsResponse'
+components:
+  schemas:
+    RandomAnimalsResponse:
+      type: object
+      properties:
+        animals:
+          type: array
+          items:
+            oneOf:
+              - $ref: '#/components/schemas/Dog'
+              - $ref: '#/components/schemas/Cat'
+              - $ref: '#/components/schemas/Mouse'
+      required:
+        - animals
+    Dog:
+      allOf:
+        - $ref: '#/components/schemas/Animal'
+        - type: object
+          properties:
+            dogId:
+              type: string
+      required:
+        - dogId
+    Animal:
+      discriminator:
+        propertyName: species
+        mapping:
+          Dog: '#/components/schemas/Dog'
+          Cat: '#/components/schemas/Cat'
+          Mouse: '#/components/schemas/Mouse'
+      properties:
+        species:
+          type: string
+      required:
+        - species
+    Cat:
+      allOf:
+        - $ref: '#/components/schemas/Animal'
+        - type: object
+          properties:
+            catId:
+              type: string
+      required:
+        - catId
+    Mouse:
+      allOf:
+        - $ref: '#/components/schemas/Animal'
+        - type: object
+          properties:
+            mouseId:
+              type: string
+      required:
+        - mouseId

modules/openapi-generator/src/test/resources/3_0/protobuf-schema/fruitOneOf.proto

@@ -14,14 +14,13 @@ package openapitools;
 
 import public "models/apple.proto";
 import public "models/banana.proto";
+import public "models/orange.proto";
 
 message Fruit {
 
     oneof fruit {
         Apple apple = 93029210;
-
         Banana banana = 322613405;
-
+        Orange orange = 471980499;
     }
-
 }

samples/client/petstore/csharp/generichost/net4.7/OneOf/.openapi-generator/FILES

@@ -7,6 +7,7 @@ docs/apis/DefaultApi.md
 docs/models/Apple.md
 docs/models/Banana.md
 docs/models/Fruit.md
+docs/models/Orange.md
 docs/scripts/git_push.ps1
 docs/scripts/git_push.sh
 src/Org.OpenAPITools.Test/Api/DependencyInjectionTests.cs
@@ -36,5 +37,6 @@ src/Org.OpenAPITools/Extensions/IServiceCollectionExtensions.cs
 src/Org.OpenAPITools/Model/Apple.cs
 src/Org.OpenAPITools/Model/Banana.cs
 src/Org.OpenAPITools/Model/Fruit.cs
+src/Org.OpenAPITools/Model/Orange.cs
 src/Org.OpenAPITools/Org.OpenAPITools.csproj
 src/Org.OpenAPITools/README.md

samples/client/petstore/csharp/generichost/net4.7/OneOf/api/openapi.yaml

@@ -22,6 +22,7 @@ components:
       oneOf:
       - $ref: "#/components/schemas/apple"
       - $ref: "#/components/schemas/banana"
+      - $ref: "#/components/schemas/orange"
       properties:
         color:
           type: string
@@ -38,4 +39,10 @@ components:
           type: number
       title: banana
       type: object
+    orange:
+      properties:
+        sweet:
+          type: boolean
+      title: orange
+      type: object
 

samples/client/petstore/csharp/generichost/net4.7/OneOf/docs/models/Orange.md

@@ -0,0 +1,10 @@
+# Org.OpenAPITools.Model.Orange
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Sweet** | **bool** |  | [optional] 
+
+[[Back to Model list]](../../README.md#documentation-for-models) [[Back to API list]](../../README.md#documentation-for-api-endpoints) [[Back to README]](../../README.md)
+

samples/client/petstore/csharp/generichost/net4.7/OneOf/src/Org.OpenAPITools.Test/Model/OrangeTests.cs

@@ -0,0 +1,65 @@
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing Orange
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class OrangeTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for Orange
+        //private Orange instance;
+
+        public OrangeTests()
+        {
+            // TODO uncomment below to create an instance of Orange
+            //instance = new Orange();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of Orange
+        /// </summary>
+        [Fact]
+        public void OrangeInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" Orange
+            //Assert.IsType<Orange>(instance);
+        }
+
+        /// <summary>
+        /// Test the property 'Sweet'
+        /// </summary>
+        [Fact]
+        public void SweetTest()
+        {
+            // TODO unit test for the property 'Sweet'
+        }
+    }
+}

samples/client/petstore/csharp/generichost/net4.7/OneOf/src/Org.OpenAPITools/Client/HostConfiguration.cs

@@ -42,6 +42,7 @@ namespace Org.OpenAPITools.Client
             _jsonOptions.Converters.Add(new AppleJsonConverter());
             _jsonOptions.Converters.Add(new BananaJsonConverter());
             _jsonOptions.Converters.Add(new FruitJsonConverter());
+            _jsonOptions.Converters.Add(new OrangeJsonConverter());
             JsonSerializerOptionsProvider jsonSerializerOptionsProvider = new JsonSerializerOptionsProvider(_jsonOptions);
             _services.AddSingleton(jsonSerializerOptionsProvider);
             _services.AddSingleton<IApiFactory, ApiFactory>();

samples/client/petstore/csharp/generichost/net4.7/OneOf/src/Org.OpenAPITools/Model/Fruit.cs

@@ -53,6 +53,18 @@ namespace Org.OpenAPITools.Model
             OnCreated();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Fruit" /> class.
+        /// </summary>
+        /// <param name="orange"></param>
+        /// <param name="color">color</param>
+        public Fruit(Orange orange, Option<string> color = default)
+        {
+            Orange = orange;
+            ColorOption = color;
+            OnCreated();
+        }
+
         partial void OnCreated();
 
         /// <summary>
@@ -65,6 +77,11 @@ namespace Org.OpenAPITools.Model
         /// </summary>
         public Banana Banana { get; set; }
 
+        /// <summary>
+        /// Gets or Sets Orange
+        /// </summary>
+        public Orange Orange { get; set; }
+
         /// <summary>
         /// Used to track the state of Color
         /// </summary>
@@ -135,6 +152,7 @@ namespace Org.OpenAPITools.Model
 
             Apple apple = default;
             Banana banana = default;
+            Orange orange = default;
 
             Utf8JsonReader utf8JsonReaderOneOf = utf8JsonReader;
             while (utf8JsonReaderOneOf.Read())
@@ -152,6 +170,9 @@ namespace Org.OpenAPITools.Model
 
                     Utf8JsonReader utf8JsonReaderBanana = utf8JsonReader;
                     ClientUtils.TryDeserialize<Banana>(ref utf8JsonReaderBanana, jsonSerializerOptions, out banana);
+
+                    Utf8JsonReader utf8JsonReaderOrange = utf8JsonReader;
+                    ClientUtils.TryDeserialize<Orange>(ref utf8JsonReaderOrange, jsonSerializerOptions, out orange);
                 }
             }
 
@@ -188,6 +209,9 @@ namespace Org.OpenAPITools.Model
             if (banana != null)
                 return new Fruit(banana, color);
 
+            if (orange != null)
+                return new Fruit(orange, color);
+
             throw new JsonException();
         }
 

samples/client/petstore/csharp/generichost/net4.7/OneOf/src/Org.OpenAPITools/Model/Orange.cs

@@ -0,0 +1,171 @@
+// <auto-generated>
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using Org.OpenAPITools.Client;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// Orange
+    /// </summary>
+    public partial class Orange : IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Orange" /> class.
+        /// </summary>
+        /// <param name="sweet">sweet</param>
+        [JsonConstructor]
+        public Orange(Option<bool?> sweet = default)
+        {
+            SweetOption = sweet;
+            OnCreated();
+        }
+
+        partial void OnCreated();
+
+        /// <summary>
+        /// Used to track the state of Sweet
+        /// </summary>
+        [JsonIgnore]
+        [global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
+        public Option<bool?> SweetOption { get; private set; }
+
+        /// <summary>
+        /// Gets or Sets Sweet
+        /// </summary>
+        [JsonPropertyName("sweet")]
+        public bool? Sweet { get { return this.SweetOption; } set { this.SweetOption = new Option<bool?>(value); } }
+
+        /// <summary>
+        /// Gets or Sets additional properties
+        /// </summary>
+        [JsonExtensionData]
+        public Dictionary<string, JsonElement> AdditionalProperties { get; } = new Dictionary<string, JsonElement>();
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder();
+            sb.Append("class Orange {\n");
+            sb.Append("  Sweet: ").Append(Sweet).Append("\n");
+            sb.Append("  AdditionalProperties: ").Append(AdditionalProperties).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// A Json converter for type <see cref="Orange" />
+    /// </summary>
+    public class OrangeJsonConverter : JsonConverter<Orange>
+    {
+        /// <summary>
+        /// Deserializes json to <see cref="Orange" />
+        /// </summary>
+        /// <param name="utf8JsonReader"></param>
+        /// <param name="typeToConvert"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <returns></returns>
+        /// <exception cref="JsonException"></exception>
+        public override Orange Read(ref Utf8JsonReader utf8JsonReader, Type typeToConvert, JsonSerializerOptions jsonSerializerOptions)
+        {
+            int currentDepth = utf8JsonReader.CurrentDepth;
+
+            if (utf8JsonReader.TokenType != JsonTokenType.StartObject && utf8JsonReader.TokenType != JsonTokenType.StartArray)
+                throw new JsonException();
+
+            JsonTokenType startingTokenType = utf8JsonReader.TokenType;
+
+            Option<bool?> sweet = default;
+
+            while (utf8JsonReader.Read())
+            {
+                if (startingTokenType == JsonTokenType.StartObject && utf8JsonReader.TokenType == JsonTokenType.EndObject && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (startingTokenType == JsonTokenType.StartArray && utf8JsonReader.TokenType == JsonTokenType.EndArray && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (utf8JsonReader.TokenType == JsonTokenType.PropertyName && currentDepth == utf8JsonReader.CurrentDepth - 1)
+                {
+                    string localVarJsonPropertyName = utf8JsonReader.GetString();
+                    utf8JsonReader.Read();
+
+                    switch (localVarJsonPropertyName)
+                    {
+                        case "sweet":
+                            sweet = new Option<bool?>(utf8JsonReader.TokenType == JsonTokenType.Null ? (bool?)null : utf8JsonReader.GetBoolean());
+                            break;
+                        default:
+                            break;
+                    }
+                }
+            }
+
+            if (sweet.IsSet && sweet.Value == null)
+                throw new ArgumentNullException(nameof(sweet), "Property is not nullable for class Orange.");
+
+            return new Orange(sweet);
+        }
+
+        /// <summary>
+        /// Serializes a <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public override void Write(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            writer.WriteStartObject();
+
+            WriteProperties(writer, orange, jsonSerializerOptions);
+            writer.WriteEndObject();
+        }
+
+        /// <summary>
+        /// Serializes the properties of <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public void WriteProperties(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            if (orange.SweetOption.IsSet)
+                writer.WriteBoolean("sweet", orange.SweetOption.Value.Value);
+        }
+    }
+}

samples/client/petstore/csharp/generichost/net4.8/OneOf/.openapi-generator/FILES

@@ -7,6 +7,7 @@ docs/apis/DefaultApi.md
 docs/models/Apple.md
 docs/models/Banana.md
 docs/models/Fruit.md
+docs/models/Orange.md
 docs/scripts/git_push.ps1
 docs/scripts/git_push.sh
 src/Org.OpenAPITools.Test/Api/DependencyInjectionTests.cs
@@ -36,5 +37,6 @@ src/Org.OpenAPITools/Extensions/IServiceCollectionExtensions.cs
 src/Org.OpenAPITools/Model/Apple.cs
 src/Org.OpenAPITools/Model/Banana.cs
 src/Org.OpenAPITools/Model/Fruit.cs
+src/Org.OpenAPITools/Model/Orange.cs
 src/Org.OpenAPITools/Org.OpenAPITools.csproj
 src/Org.OpenAPITools/README.md

samples/client/petstore/csharp/generichost/net4.8/OneOf/api/openapi.yaml

@@ -22,6 +22,7 @@ components:
       oneOf:
       - $ref: "#/components/schemas/apple"
       - $ref: "#/components/schemas/banana"
+      - $ref: "#/components/schemas/orange"
       properties:
         color:
           type: string
@@ -38,4 +39,10 @@ components:
           type: number
       title: banana
       type: object
+    orange:
+      properties:
+        sweet:
+          type: boolean
+      title: orange
+      type: object
 

samples/client/petstore/csharp/generichost/net4.8/OneOf/docs/models/Orange.md

@@ -0,0 +1,10 @@
+# Org.OpenAPITools.Model.Orange
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Sweet** | **bool** |  | [optional] 
+
+[[Back to Model list]](../../README.md#documentation-for-models) [[Back to API list]](../../README.md#documentation-for-api-endpoints) [[Back to README]](../../README.md)
+

samples/client/petstore/csharp/generichost/net4.8/OneOf/src/Org.OpenAPITools.Test/Model/OrangeTests.cs

@@ -0,0 +1,65 @@
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing Orange
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class OrangeTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for Orange
+        //private Orange instance;
+
+        public OrangeTests()
+        {
+            // TODO uncomment below to create an instance of Orange
+            //instance = new Orange();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of Orange
+        /// </summary>
+        [Fact]
+        public void OrangeInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" Orange
+            //Assert.IsType<Orange>(instance);
+        }
+
+        /// <summary>
+        /// Test the property 'Sweet'
+        /// </summary>
+        [Fact]
+        public void SweetTest()
+        {
+            // TODO unit test for the property 'Sweet'
+        }
+    }
+}

samples/client/petstore/csharp/generichost/net4.8/OneOf/src/Org.OpenAPITools/Client/HostConfiguration.cs

@@ -42,6 +42,7 @@ namespace Org.OpenAPITools.Client
             _jsonOptions.Converters.Add(new AppleJsonConverter());
             _jsonOptions.Converters.Add(new BananaJsonConverter());
             _jsonOptions.Converters.Add(new FruitJsonConverter());
+            _jsonOptions.Converters.Add(new OrangeJsonConverter());
             JsonSerializerOptionsProvider jsonSerializerOptionsProvider = new JsonSerializerOptionsProvider(_jsonOptions);
             _services.AddSingleton(jsonSerializerOptionsProvider);
             _services.AddSingleton<IApiFactory, ApiFactory>();

samples/client/petstore/csharp/generichost/net4.8/OneOf/src/Org.OpenAPITools/Model/Fruit.cs

@@ -53,6 +53,18 @@ namespace Org.OpenAPITools.Model
             OnCreated();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Fruit" /> class.
+        /// </summary>
+        /// <param name="orange"></param>
+        /// <param name="color">color</param>
+        public Fruit(Orange orange, Option<string> color = default)
+        {
+            Orange = orange;
+            ColorOption = color;
+            OnCreated();
+        }
+
         partial void OnCreated();
 
         /// <summary>
@@ -65,6 +77,11 @@ namespace Org.OpenAPITools.Model
         /// </summary>
         public Banana Banana { get; set; }
 
+        /// <summary>
+        /// Gets or Sets Orange
+        /// </summary>
+        public Orange Orange { get; set; }
+
         /// <summary>
         /// Used to track the state of Color
         /// </summary>
@@ -135,6 +152,7 @@ namespace Org.OpenAPITools.Model
 
             Apple apple = default;
             Banana banana = default;
+            Orange orange = default;
 
             Utf8JsonReader utf8JsonReaderOneOf = utf8JsonReader;
             while (utf8JsonReaderOneOf.Read())
@@ -152,6 +170,9 @@ namespace Org.OpenAPITools.Model
 
                     Utf8JsonReader utf8JsonReaderBanana = utf8JsonReader;
                     ClientUtils.TryDeserialize<Banana>(ref utf8JsonReaderBanana, jsonSerializerOptions, out banana);
+
+                    Utf8JsonReader utf8JsonReaderOrange = utf8JsonReader;
+                    ClientUtils.TryDeserialize<Orange>(ref utf8JsonReaderOrange, jsonSerializerOptions, out orange);
                 }
             }
 
@@ -188,6 +209,9 @@ namespace Org.OpenAPITools.Model
             if (banana != null)
                 return new Fruit(banana, color);
 
+            if (orange != null)
+                return new Fruit(orange, color);
+
             throw new JsonException();
         }
 

samples/client/petstore/csharp/generichost/net4.8/OneOf/src/Org.OpenAPITools/Model/Orange.cs

@@ -0,0 +1,171 @@
+// <auto-generated>
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using Org.OpenAPITools.Client;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// Orange
+    /// </summary>
+    public partial class Orange : IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Orange" /> class.
+        /// </summary>
+        /// <param name="sweet">sweet</param>
+        [JsonConstructor]
+        public Orange(Option<bool?> sweet = default)
+        {
+            SweetOption = sweet;
+            OnCreated();
+        }
+
+        partial void OnCreated();
+
+        /// <summary>
+        /// Used to track the state of Sweet
+        /// </summary>
+        [JsonIgnore]
+        [global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
+        public Option<bool?> SweetOption { get; private set; }
+
+        /// <summary>
+        /// Gets or Sets Sweet
+        /// </summary>
+        [JsonPropertyName("sweet")]
+        public bool? Sweet { get { return this.SweetOption; } set { this.SweetOption = new Option<bool?>(value); } }
+
+        /// <summary>
+        /// Gets or Sets additional properties
+        /// </summary>
+        [JsonExtensionData]
+        public Dictionary<string, JsonElement> AdditionalProperties { get; } = new Dictionary<string, JsonElement>();
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder();
+            sb.Append("class Orange {\n");
+            sb.Append("  Sweet: ").Append(Sweet).Append("\n");
+            sb.Append("  AdditionalProperties: ").Append(AdditionalProperties).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// A Json converter for type <see cref="Orange" />
+    /// </summary>
+    public class OrangeJsonConverter : JsonConverter<Orange>
+    {
+        /// <summary>
+        /// Deserializes json to <see cref="Orange" />
+        /// </summary>
+        /// <param name="utf8JsonReader"></param>
+        /// <param name="typeToConvert"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <returns></returns>
+        /// <exception cref="JsonException"></exception>
+        public override Orange Read(ref Utf8JsonReader utf8JsonReader, Type typeToConvert, JsonSerializerOptions jsonSerializerOptions)
+        {
+            int currentDepth = utf8JsonReader.CurrentDepth;
+
+            if (utf8JsonReader.TokenType != JsonTokenType.StartObject && utf8JsonReader.TokenType != JsonTokenType.StartArray)
+                throw new JsonException();
+
+            JsonTokenType startingTokenType = utf8JsonReader.TokenType;
+
+            Option<bool?> sweet = default;
+
+            while (utf8JsonReader.Read())
+            {
+                if (startingTokenType == JsonTokenType.StartObject && utf8JsonReader.TokenType == JsonTokenType.EndObject && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (startingTokenType == JsonTokenType.StartArray && utf8JsonReader.TokenType == JsonTokenType.EndArray && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (utf8JsonReader.TokenType == JsonTokenType.PropertyName && currentDepth == utf8JsonReader.CurrentDepth - 1)
+                {
+                    string localVarJsonPropertyName = utf8JsonReader.GetString();
+                    utf8JsonReader.Read();
+
+                    switch (localVarJsonPropertyName)
+                    {
+                        case "sweet":
+                            sweet = new Option<bool?>(utf8JsonReader.TokenType == JsonTokenType.Null ? (bool?)null : utf8JsonReader.GetBoolean());
+                            break;
+                        default:
+                            break;
+                    }
+                }
+            }
+
+            if (sweet.IsSet && sweet.Value == null)
+                throw new ArgumentNullException(nameof(sweet), "Property is not nullable for class Orange.");
+
+            return new Orange(sweet);
+        }
+
+        /// <summary>
+        /// Serializes a <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public override void Write(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            writer.WriteStartObject();
+
+            WriteProperties(writer, orange, jsonSerializerOptions);
+            writer.WriteEndObject();
+        }
+
+        /// <summary>
+        /// Serializes the properties of <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public void WriteProperties(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            if (orange.SweetOption.IsSet)
+                writer.WriteBoolean("sweet", orange.SweetOption.Value.Value);
+        }
+    }
+}

samples/client/petstore/csharp/generichost/net8/OneOf/.openapi-generator/FILES

@@ -7,6 +7,7 @@ docs/apis/DefaultApi.md
 docs/models/Apple.md
 docs/models/Banana.md
 docs/models/Fruit.md
+docs/models/Orange.md
 docs/scripts/git_push.ps1
 docs/scripts/git_push.sh
 src/Org.OpenAPITools.Test/Api/DependencyInjectionTests.cs
@@ -38,5 +39,6 @@ src/Org.OpenAPITools/Extensions/IServiceCollectionExtensions.cs
 src/Org.OpenAPITools/Model/Apple.cs
 src/Org.OpenAPITools/Model/Banana.cs
 src/Org.OpenAPITools/Model/Fruit.cs
+src/Org.OpenAPITools/Model/Orange.cs
 src/Org.OpenAPITools/Org.OpenAPITools.csproj
 src/Org.OpenAPITools/README.md

samples/client/petstore/csharp/generichost/net8/OneOf/api/openapi.yaml

@@ -22,6 +22,7 @@ components:
       oneOf:
       - $ref: "#/components/schemas/apple"
       - $ref: "#/components/schemas/banana"
+      - $ref: "#/components/schemas/orange"
       properties:
         color:
           type: string
@@ -38,4 +39,10 @@ components:
           type: number
       title: banana
       type: object
+    orange:
+      properties:
+        sweet:
+          type: boolean
+      title: orange
+      type: object
 

samples/client/petstore/csharp/generichost/net8/OneOf/docs/models/Orange.md

@@ -0,0 +1,10 @@
+# Org.OpenAPITools.Model.Orange
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Sweet** | **bool** |  | [optional] 
+
+[[Back to Model list]](../../README.md#documentation-for-models) [[Back to API list]](../../README.md#documentation-for-api-endpoints) [[Back to README]](../../README.md)
+

samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools.Test/Model/OrangeTests.cs

@@ -0,0 +1,65 @@
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing Orange
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class OrangeTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for Orange
+        //private Orange instance;
+
+        public OrangeTests()
+        {
+            // TODO uncomment below to create an instance of Orange
+            //instance = new Orange();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of Orange
+        /// </summary>
+        [Fact]
+        public void OrangeInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" Orange
+            //Assert.IsType<Orange>(instance);
+        }
+
+        /// <summary>
+        /// Test the property 'Sweet'
+        /// </summary>
+        [Fact]
+        public void SweetTest()
+        {
+            // TODO unit test for the property 'Sweet'
+        }
+    }
+}

samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/HostConfiguration.cs

@@ -46,6 +46,7 @@ namespace Org.OpenAPITools.Client
             _jsonOptions.Converters.Add(new AppleJsonConverter());
             _jsonOptions.Converters.Add(new BananaJsonConverter());
             _jsonOptions.Converters.Add(new FruitJsonConverter());
+            _jsonOptions.Converters.Add(new OrangeJsonConverter());
             JsonSerializerOptionsProvider jsonSerializerOptionsProvider = new(_jsonOptions);
             _services.AddSingleton(jsonSerializerOptionsProvider);
             _services.AddSingleton<IApiFactory, ApiFactory>();

samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Model/Fruit.cs

@@ -55,6 +55,18 @@ namespace Org.OpenAPITools.Model
             OnCreated();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Fruit" /> class.
+        /// </summary>
+        /// <param name="orange"></param>
+        /// <param name="color">color</param>
+        public Fruit(Orange orange, Option<string?> color = default)
+        {
+            Orange = orange;
+            ColorOption = color;
+            OnCreated();
+        }
+
         partial void OnCreated();
 
         /// <summary>
@@ -67,6 +79,11 @@ namespace Org.OpenAPITools.Model
         /// </summary>
         public Banana? Banana { get; set; }
 
+        /// <summary>
+        /// Gets or Sets Orange
+        /// </summary>
+        public Orange? Orange { get; set; }
+
         /// <summary>
         /// Used to track the state of Color
         /// </summary>
@@ -137,6 +154,7 @@ namespace Org.OpenAPITools.Model
 
             Apple? apple = default;
             Banana? banana = default;
+            Orange? orange = default;
 
             Utf8JsonReader utf8JsonReaderOneOf = utf8JsonReader;
             while (utf8JsonReaderOneOf.Read())
@@ -154,6 +172,9 @@ namespace Org.OpenAPITools.Model
 
                     Utf8JsonReader utf8JsonReaderBanana = utf8JsonReader;
                     ClientUtils.TryDeserialize<Banana?>(ref utf8JsonReaderBanana, jsonSerializerOptions, out banana);
+
+                    Utf8JsonReader utf8JsonReaderOrange = utf8JsonReader;
+                    ClientUtils.TryDeserialize<Orange?>(ref utf8JsonReaderOrange, jsonSerializerOptions, out orange);
                 }
             }
 
@@ -190,6 +211,9 @@ namespace Org.OpenAPITools.Model
             if (banana != null)
                 return new Fruit(banana, color);
 
+            if (orange != null)
+                return new Fruit(orange, color);
+
             throw new JsonException();
         }
 

samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Model/Orange.cs

@@ -0,0 +1,173 @@
+// <auto-generated>
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+#nullable enable
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using Org.OpenAPITools.Client;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// Orange
+    /// </summary>
+    public partial class Orange : IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Orange" /> class.
+        /// </summary>
+        /// <param name="sweet">sweet</param>
+        [JsonConstructor]
+        public Orange(Option<bool?> sweet = default)
+        {
+            SweetOption = sweet;
+            OnCreated();
+        }
+
+        partial void OnCreated();
+
+        /// <summary>
+        /// Used to track the state of Sweet
+        /// </summary>
+        [JsonIgnore]
+        [global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
+        public Option<bool?> SweetOption { get; private set; }
+
+        /// <summary>
+        /// Gets or Sets Sweet
+        /// </summary>
+        [JsonPropertyName("sweet")]
+        public bool? Sweet { get { return this.SweetOption; } set { this.SweetOption = new(value); } }
+
+        /// <summary>
+        /// Gets or Sets additional properties
+        /// </summary>
+        [JsonExtensionData]
+        public Dictionary<string, JsonElement> AdditionalProperties { get; } = new Dictionary<string, JsonElement>();
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder();
+            sb.Append("class Orange {\n");
+            sb.Append("  Sweet: ").Append(Sweet).Append("\n");
+            sb.Append("  AdditionalProperties: ").Append(AdditionalProperties).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// A Json converter for type <see cref="Orange" />
+    /// </summary>
+    public class OrangeJsonConverter : JsonConverter<Orange>
+    {
+        /// <summary>
+        /// Deserializes json to <see cref="Orange" />
+        /// </summary>
+        /// <param name="utf8JsonReader"></param>
+        /// <param name="typeToConvert"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <returns></returns>
+        /// <exception cref="JsonException"></exception>
+        public override Orange Read(ref Utf8JsonReader utf8JsonReader, Type typeToConvert, JsonSerializerOptions jsonSerializerOptions)
+        {
+            int currentDepth = utf8JsonReader.CurrentDepth;
+
+            if (utf8JsonReader.TokenType != JsonTokenType.StartObject && utf8JsonReader.TokenType != JsonTokenType.StartArray)
+                throw new JsonException();
+
+            JsonTokenType startingTokenType = utf8JsonReader.TokenType;
+
+            Option<bool?> sweet = default;
+
+            while (utf8JsonReader.Read())
+            {
+                if (startingTokenType == JsonTokenType.StartObject && utf8JsonReader.TokenType == JsonTokenType.EndObject && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (startingTokenType == JsonTokenType.StartArray && utf8JsonReader.TokenType == JsonTokenType.EndArray && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (utf8JsonReader.TokenType == JsonTokenType.PropertyName && currentDepth == utf8JsonReader.CurrentDepth - 1)
+                {
+                    string? localVarJsonPropertyName = utf8JsonReader.GetString();
+                    utf8JsonReader.Read();
+
+                    switch (localVarJsonPropertyName)
+                    {
+                        case "sweet":
+                            sweet = new Option<bool?>(utf8JsonReader.TokenType == JsonTokenType.Null ? (bool?)null : utf8JsonReader.GetBoolean());
+                            break;
+                        default:
+                            break;
+                    }
+                }
+            }
+
+            if (sweet.IsSet && sweet.Value == null)
+                throw new ArgumentNullException(nameof(sweet), "Property is not nullable for class Orange.");
+
+            return new Orange(sweet);
+        }
+
+        /// <summary>
+        /// Serializes a <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public override void Write(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            writer.WriteStartObject();
+
+            WriteProperties(writer, orange, jsonSerializerOptions);
+            writer.WriteEndObject();
+        }
+
+        /// <summary>
+        /// Serializes the properties of <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public void WriteProperties(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            if (orange.SweetOption.IsSet)
+                writer.WriteBoolean("sweet", orange.SweetOption.Value!.Value);
+        }
+    }
+}

samples/client/petstore/csharp/generichost/net9/OneOf/.openapi-generator/FILES

@@ -7,6 +7,7 @@ docs/apis/DefaultApi.md
 docs/models/Apple.md
 docs/models/Banana.md
 docs/models/Fruit.md
+docs/models/Orange.md
 docs/scripts/git_push.ps1
 docs/scripts/git_push.sh
 src/Org.OpenAPITools.Test/Api/DependencyInjectionTests.cs
@@ -38,5 +39,6 @@ src/Org.OpenAPITools/Extensions/IServiceCollectionExtensions.cs
 src/Org.OpenAPITools/Model/Apple.cs
 src/Org.OpenAPITools/Model/Banana.cs
 src/Org.OpenAPITools/Model/Fruit.cs
+src/Org.OpenAPITools/Model/Orange.cs
 src/Org.OpenAPITools/Org.OpenAPITools.csproj
 src/Org.OpenAPITools/README.md

samples/client/petstore/csharp/generichost/net9/OneOf/api/openapi.yaml

@@ -22,6 +22,7 @@ components:
       oneOf:
       - $ref: "#/components/schemas/apple"
       - $ref: "#/components/schemas/banana"
+      - $ref: "#/components/schemas/orange"
       properties:
         color:
           type: string
@@ -38,4 +39,10 @@ components:
           type: number
       title: banana
       type: object
+    orange:
+      properties:
+        sweet:
+          type: boolean
+      title: orange
+      type: object
 

samples/client/petstore/csharp/generichost/net9/OneOf/docs/models/Orange.md

@@ -0,0 +1,10 @@
+# Org.OpenAPITools.Model.Orange
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Sweet** | **bool** |  | [optional] 
+
+[[Back to Model list]](../../README.md#documentation-for-models) [[Back to API list]](../../README.md#documentation-for-api-endpoints) [[Back to README]](../../README.md)
+

samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools.Test/Model/OrangeTests.cs

@@ -0,0 +1,65 @@
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing Orange
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class OrangeTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for Orange
+        //private Orange instance;
+
+        public OrangeTests()
+        {
+            // TODO uncomment below to create an instance of Orange
+            //instance = new Orange();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of Orange
+        /// </summary>
+        [Fact]
+        public void OrangeInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" Orange
+            //Assert.IsType<Orange>(instance);
+        }
+
+        /// <summary>
+        /// Test the property 'Sweet'
+        /// </summary>
+        [Fact]
+        public void SweetTest()
+        {
+            // TODO unit test for the property 'Sweet'
+        }
+    }
+}

samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/HostConfiguration.cs

@@ -46,6 +46,7 @@ namespace Org.OpenAPITools.Client
             _jsonOptions.Converters.Add(new AppleJsonConverter());
             _jsonOptions.Converters.Add(new BananaJsonConverter());
             _jsonOptions.Converters.Add(new FruitJsonConverter());
+            _jsonOptions.Converters.Add(new OrangeJsonConverter());
             JsonSerializerOptionsProvider jsonSerializerOptionsProvider = new(_jsonOptions);
             _services.AddSingleton(jsonSerializerOptionsProvider);
             _services.AddSingleton<IApiFactory, ApiFactory>();

samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Model/Fruit.cs

@@ -55,6 +55,18 @@ namespace Org.OpenAPITools.Model
             OnCreated();
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Fruit" /> class.
+        /// </summary>
+        /// <param name="orange"></param>
+        /// <param name="color">color</param>
+        public Fruit(Orange orange, Option<string?> color = default)
+        {
+            Orange = orange;
+            ColorOption = color;
+            OnCreated();
+        }
+
         partial void OnCreated();
 
         /// <summary>
@@ -67,6 +79,11 @@ namespace Org.OpenAPITools.Model
         /// </summary>
         public Banana? Banana { get; set; }
 
+        /// <summary>
+        /// Gets or Sets Orange
+        /// </summary>
+        public Orange? Orange { get; set; }
+
         /// <summary>
         /// Used to track the state of Color
         /// </summary>
@@ -137,6 +154,7 @@ namespace Org.OpenAPITools.Model
 
             Apple? apple = default;
             Banana? banana = default;
+            Orange? orange = default;
 
             Utf8JsonReader utf8JsonReaderOneOf = utf8JsonReader;
             while (utf8JsonReaderOneOf.Read())
@@ -154,6 +172,9 @@ namespace Org.OpenAPITools.Model
 
                     Utf8JsonReader utf8JsonReaderBanana = utf8JsonReader;
                     ClientUtils.TryDeserialize<Banana?>(ref utf8JsonReaderBanana, jsonSerializerOptions, out banana);
+
+                    Utf8JsonReader utf8JsonReaderOrange = utf8JsonReader;
+                    ClientUtils.TryDeserialize<Orange?>(ref utf8JsonReaderOrange, jsonSerializerOptions, out orange);
                 }
             }
 
@@ -190,6 +211,9 @@ namespace Org.OpenAPITools.Model
             if (banana != null)
                 return new Fruit(banana, color);
 
+            if (orange != null)
+                return new Fruit(orange, color);
+
             throw new JsonException();
         }
 

samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Model/Orange.cs

@@ -0,0 +1,173 @@
+// <auto-generated>
+/*
+ * fruity
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * The version of the OpenAPI document: 0.0.1
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+#nullable enable
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using Org.OpenAPITools.Client;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// Orange
+    /// </summary>
+    public partial class Orange : IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Orange" /> class.
+        /// </summary>
+        /// <param name="sweet">sweet</param>
+        [JsonConstructor]
+        public Orange(Option<bool?> sweet = default)
+        {
+            SweetOption = sweet;
+            OnCreated();
+        }
+
+        partial void OnCreated();
+
+        /// <summary>
+        /// Used to track the state of Sweet
+        /// </summary>
+        [JsonIgnore]
+        [global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
+        public Option<bool?> SweetOption { get; private set; }
+
+        /// <summary>
+        /// Gets or Sets Sweet
+        /// </summary>
+        [JsonPropertyName("sweet")]
+        public bool? Sweet { get { return this.SweetOption; } set { this.SweetOption = new(value); } }
+
+        /// <summary>
+        /// Gets or Sets additional properties
+        /// </summary>
+        [JsonExtensionData]
+        public Dictionary<string, JsonElement> AdditionalProperties { get; } = new Dictionary<string, JsonElement>();
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder();
+            sb.Append("class Orange {\n");
+            sb.Append("  Sweet: ").Append(Sweet).Append("\n");
+            sb.Append("  AdditionalProperties: ").Append(AdditionalProperties).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// A Json converter for type <see cref="Orange" />
+    /// </summary>
+    public class OrangeJsonConverter : JsonConverter<Orange>
+    {
+        /// <summary>
+        /// Deserializes json to <see cref="Orange" />
+        /// </summary>
+        /// <param name="utf8JsonReader"></param>
+        /// <param name="typeToConvert"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <returns></returns>
+        /// <exception cref="JsonException"></exception>
+        public override Orange Read(ref Utf8JsonReader utf8JsonReader, Type typeToConvert, JsonSerializerOptions jsonSerializerOptions)
+        {
+            int currentDepth = utf8JsonReader.CurrentDepth;
+
+            if (utf8JsonReader.TokenType != JsonTokenType.StartObject && utf8JsonReader.TokenType != JsonTokenType.StartArray)
+                throw new JsonException();
+
+            JsonTokenType startingTokenType = utf8JsonReader.TokenType;
+
+            Option<bool?> sweet = default;
+
+            while (utf8JsonReader.Read())
+            {
+                if (startingTokenType == JsonTokenType.StartObject && utf8JsonReader.TokenType == JsonTokenType.EndObject && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (startingTokenType == JsonTokenType.StartArray && utf8JsonReader.TokenType == JsonTokenType.EndArray && currentDepth == utf8JsonReader.CurrentDepth)
+                    break;
+
+                if (utf8JsonReader.TokenType == JsonTokenType.PropertyName && currentDepth == utf8JsonReader.CurrentDepth - 1)
+                {
+                    string? localVarJsonPropertyName = utf8JsonReader.GetString();
+                    utf8JsonReader.Read();
+
+                    switch (localVarJsonPropertyName)
+                    {
+                        case "sweet":
+                            sweet = new Option<bool?>(utf8JsonReader.TokenType == JsonTokenType.Null ? (bool?)null : utf8JsonReader.GetBoolean());
+                            break;
+                        default:
+                            break;
+                    }
+                }
+            }
+
+            if (sweet.IsSet && sweet.Value == null)
+                throw new ArgumentNullException(nameof(sweet), "Property is not nullable for class Orange.");
+
+            return new Orange(sweet);
+        }
+
+        /// <summary>
+        /// Serializes a <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public override void Write(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            writer.WriteStartObject();
+
+            WriteProperties(writer, orange, jsonSerializerOptions);
+            writer.WriteEndObject();
+        }
+
+        /// <summary>
+        /// Serializes the properties of <see cref="Orange" />
+        /// </summary>
+        /// <param name="writer"></param>
+        /// <param name="orange"></param>
+        /// <param name="jsonSerializerOptions"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        public void WriteProperties(Utf8JsonWriter writer, Orange orange, JsonSerializerOptions jsonSerializerOptions)
+        {
+            if (orange.SweetOption.IsSet)
+                writer.WriteBoolean("sweet", orange.SweetOption.Value!.Value);
+        }
+    }
+}

samples/client/petstore/csharp/httpclient/net9/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/httpclient/net9/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/httpclient/net9/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net8/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net8/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net8/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/NullableShape.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/Shape.md

@@ -5,6 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/ShapeOrNull.md

@@ -6,6 +6,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
+**TriangleType** | **string** |  | 
 **QuadrilateralType** | **string** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/java/okhttp-gson/docs/NullableShape.md

@@ -9,6 +9,7 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 | Name | Type | Description | Notes |
 |------------ | ------------- | ------------- | -------------|
 |**shapeType** | **String** |  |  |
+|**triangleType** | **String** |  |  |
 |**quadrilateralType** | **String** |  |  |
 
 

samples/client/petstore/java/okhttp-gson/docs/Shape.md

@@ -8,6 +8,7 @@
 | Name | Type | Description | Notes |
 |------------ | ------------- | ------------- | -------------|
 |**shapeType** | **String** |  |  |
+|**triangleType** | **String** |  |  |
 |**quadrilateralType** | **String** |  |  |
 
 

samples/client/petstore/java/okhttp-gson/docs/ShapeOrNull.md

@@ -9,6 +9,7 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 | Name | Type | Description | Notes |
 |------------ | ------------- | ------------- | -------------|
 |**shapeType** | **String** |  |  |
+|**triangleType** | **String** |  |  |
 |**quadrilateralType** | **String** |  |  |
 
 

samples/client/petstore/perl/lib/WWW/OpenAPIClient/Object/Adult.pm

@@ -34,7 +34,7 @@ use WWW::OpenAPIClient::Object::Child;
 use WWW::OpenAPIClient::Object::Human;
 use WWW::OpenAPIClient::Object::Person;
 
-use base ("Class::Accessor", "Class::Data::Inheritable", "WWW::OpenAPIClient::Object::Person", "WWW::OpenAPIClient::Object::Human");
+use base ("Class::Accessor", "Class::Data::Inheritable");
 
 #
 #A representation of an adult
@@ -87,12 +87,6 @@ sub init
         my $args_key = $self->attribute_map->{$attribute};
         $self->$attribute( $args{ $args_key } );
     }
-
-    # initialize parent object Person
-    $self->WWW::OpenAPIClient::Object::Person::init(%args);
-
-    # initialize parent object Human
-    $self->WWW::OpenAPIClient::Object::Human::init(%args);
 }
 
 # return perl hash
@@ -100,12 +94,6 @@ sub to_hash {
     my $self = shift;
     my $_hash = decode_json(JSON->new->convert_blessed->encode($self));
 
-    # call Person to_hash and then combine hash
-    $_hash = { %$_hash, %$self->WWW::OpenAPIClient::Object::Person::to_hash };
-
-    # call Human to_hash and then combine hash
-    $_hash = { %$_hash, %$self->WWW::OpenAPIClient::Object::Human::to_hash };
-
     return $_hash;
 }
 
@@ -136,12 +124,6 @@ sub TO_JSON {
         }
     }
 
-    # combine parent (Person) TO_JSON
-    $_data = { %$_data, %$self->WWW::OpenAPIClient::Object::Person::TO_JSON };
-
-    # combine parent (Human) TO_JSON
-    $_data = { %$_data, %$self->WWW::OpenAPIClient::Object::Human::TO_JSON };
-
     return $_data;
 }
 
@@ -209,12 +191,6 @@ sub from_hash {
         }
     }
 
-    # call parent (Person) from_hash
-    $self->WWW::OpenAPIClient::Object::Person::from_hash($hash);
-
-    # call parent (Human) from_hash
-    $self->WWW::OpenAPIClient::Object::Human::from_hash($hash);
-
     return $self;
 }
 

samples/client/petstore/swift5/oneOf/.openapi-generator/FILES

@@ -15,6 +15,7 @@ PetstoreClient/Classes/OpenAPIs/Models.swift
 PetstoreClient/Classes/OpenAPIs/Models/Apple.swift
 PetstoreClient/Classes/OpenAPIs/Models/Banana.swift
 PetstoreClient/Classes/OpenAPIs/Models/Fruit.swift
+PetstoreClient/Classes/OpenAPIs/Models/Orange.swift
 PetstoreClient/Classes/OpenAPIs/OpenISO8601DateFormatter.swift
 PetstoreClient/Classes/OpenAPIs/SynchronizedDictionary.swift
 PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -24,5 +25,6 @@ docs/Apple.md
 docs/Banana.md
 docs/DefaultAPI.md
 docs/Fruit.md
+docs/Orange.md
 git_push.sh
 project.yml

samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/Models/Fruit.swift

@@ -13,6 +13,7 @@ import AnyCodable
 public enum Fruit: Codable, JSONEncodable, Hashable {
     case typeApple(Apple)
     case typeBanana(Banana)
+    case typeOrange(Orange)
 
     public func encode(to encoder: Encoder) throws {
         var container = encoder.singleValueContainer()
@@ -21,6 +22,8 @@ public enum Fruit: Codable, JSONEncodable, Hashable {
             try container.encode(value)
         case .typeBanana(let value):
             try container.encode(value)
+        case .typeOrange(let value):
+            try container.encode(value)
         }
     }
 
@@ -30,6 +33,8 @@ public enum Fruit: Codable, JSONEncodable, Hashable {
             self = .typeApple(value)
         } else if let value = try? container.decode(Banana.self) {
             self = .typeBanana(value)
+        } else if let value = try? container.decode(Orange.self) {
+            self = .typeOrange(value)
         } else {
             throw DecodingError.typeMismatch(Self.Type.self, .init(codingPath: decoder.codingPath, debugDescription: "Unable to decode instance of Fruit"))
         }

samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/Models/Orange.swift

@@ -0,0 +1,32 @@
+//
+// Orange.swift
+//
+// Generated by openapi-generator
+// https://openapi-generator.tech
+//
+
+import Foundation
+#if canImport(AnyCodable)
+import AnyCodable
+#endif
+
+public struct Orange: Codable, JSONEncodable, Hashable {
+
+    public var sweet: Bool?
+
+    public init(sweet: Bool? = nil) {
+        self.sweet = sweet
+    }
+
+    public enum CodingKeys: String, CodingKey, CaseIterable {
+        case sweet
+    }
+
+    // Encodable protocol methods
+
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encodeIfPresent(sweet, forKey: .sweet)
+    }
+}
+

samples/client/petstore/swift5/oneOf/README.md

@@ -34,6 +34,7 @@ Class | Method | HTTP request | Description
  - [Apple](docs/Apple.md)
  - [Banana](docs/Banana.md)
  - [Fruit](docs/Fruit.md)
+ - [Orange](docs/Orange.md)
 
 
 <a id="documentation-for-authorization"></a>

samples/client/petstore/swift5/oneOf/docs/Fruit.md

@@ -6,6 +6,7 @@ Name | Type | Description | Notes
 **color** | **String** |  | [optional] 
 **kind** | **String** |  | [optional] 
 **count** | **Double** |  | [optional] 
+**sweet** | **Bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/swift5/oneOf/docs/Orange.md

@@ -0,0 +1,11 @@
+# Orange
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**sweet** | **Bool** |  | [optional] 
+**color** | **String** |  | [optional] 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/swift6/oneOf/.openapi-generator/FILES

@@ -19,10 +19,12 @@ PetstoreClient/Classes/OpenAPIs/Infrastructure/Validation.swift
 PetstoreClient/Classes/OpenAPIs/Models/Apple.swift
 PetstoreClient/Classes/OpenAPIs/Models/Banana.swift
 PetstoreClient/Classes/OpenAPIs/Models/Fruit.swift
+PetstoreClient/Classes/OpenAPIs/Models/Orange.swift
 README.md
 docs/Apple.md
 docs/Banana.md
 docs/DefaultAPI.md
 docs/Fruit.md
+docs/Orange.md
 git_push.sh
 project.yml

samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Models/Fruit.swift

@@ -10,6 +10,7 @@ import Foundation
 public enum Fruit: Sendable, Codable, ParameterConvertible, Hashable {
     case typeApple(Apple)
     case typeBanana(Banana)
+    case typeOrange(Orange)
 
     public func encode(to encoder: Encoder) throws {
         var container = encoder.singleValueContainer()
@@ -18,6 +19,8 @@ public enum Fruit: Sendable, Codable, ParameterConvertible, Hashable {
             try container.encode(value)
         case .typeBanana(let value):
             try container.encode(value)
+        case .typeOrange(let value):
+            try container.encode(value)
         }
     }
 
@@ -27,6 +30,8 @@ public enum Fruit: Sendable, Codable, ParameterConvertible, Hashable {
             self = .typeApple(value)
         } else if let value = try? container.decode(Banana.self) {
             self = .typeBanana(value)
+        } else if let value = try? container.decode(Orange.self) {
+            self = .typeOrange(value)
         } else {
             throw DecodingError.typeMismatch(Self.Type.self, .init(codingPath: decoder.codingPath, debugDescription: "Unable to decode instance of Fruit"))
         }

samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Models/Orange.swift

@@ -0,0 +1,29 @@
+//
+// Orange.swift
+//
+// Generated by openapi-generator
+// https://openapi-generator.tech
+//
+
+import Foundation
+
+public struct Orange: Sendable, Codable, ParameterConvertible, Hashable {
+
+    public var sweet: Bool?
+
+    public init(sweet: Bool? = nil) {
+        self.sweet = sweet
+    }
+
+    public enum CodingKeys: String, CodingKey, CaseIterable {
+        case sweet
+    }
+
+    // Encodable protocol methods
+
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encodeIfPresent(sweet, forKey: .sweet)
+    }
+}
+

samples/client/petstore/swift6/oneOf/README.md

@@ -34,6 +34,7 @@ Class | Method | HTTP request | Description
  - [Apple](docs/Apple.md)
  - [Banana](docs/Banana.md)
  - [Fruit](docs/Fruit.md)
+ - [Orange](docs/Orange.md)
 
 
 <a id="documentation-for-authorization"></a>

samples/client/petstore/swift6/oneOf/docs/Fruit.md

@@ -6,6 +6,7 @@ Name | Type | Description | Notes
 **color** | **String** |  | [optional] 
 **kind** | **String** |  | [optional] 
 **count** | **Double** |  | [optional] 
+**sweet** | **Bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/swift6/oneOf/docs/Orange.md

@@ -0,0 +1,11 @@
+# Orange
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**sweet** | **Bool** |  | [optional] 
+**color** | **String** |  | [optional] 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/client/petstore/typescript-axios/builds/test-petstore/docs/NullableShape.md

@@ -7,6 +7,7 @@ The value may be a shape or the \'null\' value. The \'nullable\' attribute was i
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **shapeType** | **string** |  | [default to undefined]
+**triangleType** | **string** |  | [default to undefined]
 **quadrilateralType** | **string** |  | [default to undefined]
 
 ## Example
@@ -16,6 +17,7 @@ import { NullableShape } from './api';
 
 const instance: NullableShape = {
     shapeType,
+    triangleType,
     quadrilateralType,
 };
 ```

samples/client/petstore/typescript-axios/builds/test-petstore/docs/Shape.md

@@ -6,6 +6,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **shapeType** | **string** |  | [default to undefined]
+**triangleType** | **string** |  | [default to undefined]
 **quadrilateralType** | **string** |  | [default to undefined]
 
 ## Example
@@ -15,6 +16,7 @@ import { Shape } from './api';
 
 const instance: Shape = {
     shapeType,
+    triangleType,
     quadrilateralType,
 };
 ```

samples/client/petstore/typescript-axios/builds/test-petstore/docs/ShapeOrNull.md

@@ -7,6 +7,7 @@ The value may be a shape or the \'null\' value. This is introduced in OAS schema
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **shapeType** | **string** |  | [default to undefined]
+**triangleType** | **string** |  | [default to undefined]
 **quadrilateralType** | **string** |  | [default to undefined]
 
 ## Example
@@ -16,6 +17,7 @@ import { ShapeOrNull } from './api';
 
 const instance: ShapeOrNull = {
     shapeType,
+    triangleType,
     quadrilateralType,
 };
 ```

samples/openapi3/client/petstore/dart-dio/oneof/.openapi-generator/FILES

@@ -5,6 +5,7 @@ doc/Apple.md
 doc/Banana.md
 doc/DefaultApi.md
 doc/Fruit.md
+doc/Orange.md
 lib/openapi.dart
 lib/src/api.dart
 lib/src/api/default_api.dart
@@ -19,5 +20,6 @@ lib/src/model/apple.dart
 lib/src/model/banana.dart
 lib/src/model/date.dart
 lib/src/model/fruit.dart
+lib/src/model/orange.dart
 lib/src/serializers.dart
 pubspec.yaml

samples/openapi3/client/petstore/dart-dio/oneof/README.md

@@ -72,6 +72,7 @@ Class | Method | HTTP request | Description
  - [Apple](doc/Apple.md)
  - [Banana](doc/Banana.md)
  - [Fruit](doc/Fruit.md)
+ - [Orange](doc/Orange.md)
 
 
 ## Documentation For Authorization

samples/openapi3/client/petstore/dart-dio/oneof/doc/Fruit.md

@@ -11,6 +11,7 @@ Name | Type | Description | Notes
 **color** | **String** |  | [optional] 
 **kind** | **String** |  | [optional] 
 **count** | **num** |  | [optional] 
+**sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/openapi3/client/petstore/dart-dio/oneof/doc/Orange.md

@@ -0,0 +1,15 @@
+# openapi.model.Orange
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**sweet** | **bool** |  | [optional] 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/openapi3/client/petstore/dart-dio/oneof/lib/openapi.dart

@@ -15,4 +15,5 @@ export 'package:openapi/src/api/default_api.dart';
 export 'package:openapi/src/model/apple.dart';
 export 'package:openapi/src/model/banana.dart';
 export 'package:openapi/src/model/fruit.dart';
+export 'package:openapi/src/model/orange.dart';
 

samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart

@@ -5,6 +5,7 @@
 // ignore_for_file: unused_element
 import 'package:openapi/src/model/apple.dart';
 import 'package:openapi/src/model/banana.dart';
+import 'package:openapi/src/model/orange.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
 import 'package:one_of/one_of.dart';
@@ -17,12 +18,13 @@ part 'fruit.g.dart';
 /// * [color] 
 /// * [kind] 
 /// * [count] 
+/// * [sweet] 
 @BuiltValue()
 abstract class Fruit implements Built<Fruit, FruitBuilder> {
   @BuiltValueField(wireName: r'color')
   String? get color;
 
-  /// One Of [Apple], [Banana]
+  /// One Of [Apple], [Banana], [Orange]
   OneOf get oneOf;
 
   Fruit._();
@@ -104,7 +106,7 @@ class _$FruitSerializer implements PrimitiveSerializer<Fruit> {
   }) {
     final result = FruitBuilder();
     Object? oneOfDataSrc;
-    final targetType = const FullType(OneOf, [FullType(Apple), FullType(Banana), ]);
+    final targetType = const FullType(OneOf, [FullType(Apple), FullType(Banana), FullType(Orange), ]);
     final serializedList = (serialized as Iterable<Object?>).toList();
     final unhandled = <Object?>[];
     _deserializeProperties(

samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/orange.dart

@@ -0,0 +1,108 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+// ignore_for_file: unused_element
+import 'package:built_value/built_value.dart';
+import 'package:built_value/serializer.dart';
+
+part 'orange.g.dart';
+
+/// Orange
+///
+/// Properties:
+/// * [sweet] 
+@BuiltValue()
+abstract class Orange implements Built<Orange, OrangeBuilder> {
+  @BuiltValueField(wireName: r'sweet')
+  bool? get sweet;
+
+  Orange._();
+
+  factory Orange([void updates(OrangeBuilder b)]) = _$Orange;
+
+  @BuiltValueHook(initializeBuilder: true)
+  static void _defaults(OrangeBuilder b) => b;
+
+  @BuiltValueSerializer(custom: true)
+  static Serializer<Orange> get serializer => _$OrangeSerializer();
+}
+
+class _$OrangeSerializer implements PrimitiveSerializer<Orange> {
+  @override
+  final Iterable<Type> types = const [Orange, _$Orange];
+
+  @override
+  final String wireName = r'Orange';
+
+  Iterable<Object?> _serializeProperties(
+    Serializers serializers,
+    Orange object, {
+    FullType specifiedType = FullType.unspecified,
+  }) sync* {
+    if (object.sweet != null) {
+      yield r'sweet';
+      yield serializers.serialize(
+        object.sweet,
+        specifiedType: const FullType(bool),
+      );
+    }
+  }
+
+  @override
+  Object serialize(
+    Serializers serializers,
+    Orange object, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    return _serializeProperties(serializers, object, specifiedType: specifiedType).toList();
+  }
+
+  void _deserializeProperties(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+    required List<Object?> serializedList,
+    required OrangeBuilder result,
+    required List<Object?> unhandled,
+  }) {
+    for (var i = 0; i < serializedList.length; i += 2) {
+      final key = serializedList[i] as String;
+      final value = serializedList[i + 1];
+      switch (key) {
+        case r'sweet':
+          final valueDes = serializers.deserialize(
+            value,
+            specifiedType: const FullType(bool),
+          ) as bool;
+          result.sweet = valueDes;
+          break;
+        default:
+          unhandled.add(key);
+          unhandled.add(value);
+          break;
+      }
+    }
+  }
+
+  @override
+  Orange deserialize(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    final result = OrangeBuilder();
+    final serializedList = (serialized as Iterable<Object?>).toList();
+    final unhandled = <Object?>[];
+    _deserializeProperties(
+      serializers,
+      serialized,
+      specifiedType: specifiedType,
+      serializedList: serializedList,
+      unhandled: unhandled,
+      result: result,
+    );
+    return result.build();
+  }
+}
+

samples/openapi3/client/petstore/dart-dio/oneof/lib/src/serializers.dart

@@ -17,6 +17,7 @@ import 'package:openapi/src/model/date.dart';
 import 'package:openapi/src/model/apple.dart';
 import 'package:openapi/src/model/banana.dart';
 import 'package:openapi/src/model/fruit.dart';
+import 'package:openapi/src/model/orange.dart';
 
 part 'serializers.g.dart';
 
@@ -24,6 +25,7 @@ part 'serializers.g.dart';
   Apple,
   Banana,
   Fruit,
+  Orange,
 ])
 Serializers serializers = (_$serializers.toBuilder()
       ..add(const OneOfSerializer())

samples/openapi3/client/petstore/dart-dio/oneof/test/orange_test.dart

@@ -0,0 +1,16 @@
+import 'package:test/test.dart';
+import 'package:openapi/openapi.dart';
+
+// tests for Orange
+void main() {
+  final instance = OrangeBuilder();
+  // TODO add properties to the builder and call build()
+
+  group(Orange, () {
+    // bool sweet
+    test('to test the property `sweet`', () async {
+      // TODO
+    });
+
+  });
+}