[Go] Fix an issue causing int array reference translated to an invalid type []Integer (#19013)

* [Go] Fix an issue causing int array ref be converted into an invalid type, `[]Integer`

* Add test case: wrapped and referenced integer of an array to Go client samples

* add check for ref to property in go abstract

* Update modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractGoCodegen.java

Co-authored-by: Zhiwei <zhiwei.liang27@pm.me>

---------

Co-authored-by: Zhiwei Liang <zhi.wei.liang@outlook.com>
Co-authored-by: Zhiwei <zhiwei.liang27@pm.me>

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractGoCodegen.java

@@ -40,17 +40,27 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
     private final Logger LOGGER = LoggerFactory.getLogger(AbstractGoCodegen.class);
     private static final String NUMERIC_ENUM_PREFIX = "_";
 
-    @Setter protected boolean withGoCodegenComment = false;
+    @Setter
-    @Setter protected boolean withAWSV4Signature = false;
+    protected boolean withGoCodegenComment = false;
-    @Setter protected boolean withXml = false;
+    @Setter
-    @Setter protected boolean enumClassPrefix = false;
+    protected boolean withAWSV4Signature = false;
-    @Setter protected boolean structPrefix = false;
+    @Setter
-    @Setter protected boolean generateInterfaces = false;
+    protected boolean withXml = false;
-    @Setter protected boolean withGoMod = false;
+    @Setter
-    @Setter protected boolean generateMarshalJSON = true;
+    protected boolean enumClassPrefix = false;
-    @Setter protected boolean generateUnmarshalJSON = true;
+    @Setter
+    protected boolean structPrefix = false;
+    @Setter
+    protected boolean generateInterfaces = false;
+    @Setter
+    protected boolean withGoMod = false;
+    @Setter
+    protected boolean generateMarshalJSON = true;
+    @Setter
+    protected boolean generateUnmarshalJSON = true;
 
-    @Setter protected String packageName = "openapi";
+    @Setter
+    protected String packageName = "openapi";
     protected Set<String> numberTypes;
 
     public AbstractGoCodegen() {
@@ -424,6 +434,13 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
         String ref = p.get$ref();
         String type;
 
+        // schema is a ref to property's schema e.g. #/components/schemas/Pet/properties/id
+        if (ModelUtils.isRefToSchemaWithProperties(ref)) {
+            Schema propertySchema = ModelUtils.getSchemaFromRefToSchemaWithProperties(openAPI, ref);
+            openAPIType = super.getSchemaType(propertySchema);
+            ref = propertySchema.get$ref();
+        }
+
         if (ref != null && !ref.isEmpty()) {
             type = toModelName(openAPIType);
         } else if ("object".equals(openAPIType) && ModelUtils.isAnyType(p)) {
@@ -431,10 +448,12 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
             type = "interface{}";
         } else if (typeMapping.containsKey(openAPIType)) {
             type = typeMapping.get(openAPIType);
-            if (languageSpecificPrimitives.contains(type))
+            if (languageSpecificPrimitives.contains(type)) {
                 return (type);
-        } else
+            }
+        } else {
             type = openAPIType;
+        }
         return type;
     }
 
@@ -762,7 +781,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
 
                 if (cp.pattern != null) {
                     cp.vendorExtensions.put("x-go-custom-tag", "validate:\"regexp=" +
-                        cp.pattern.replace("\\","\\\\").replaceAll("^/|/$","") +
+                            cp.pattern.replace("\\", "\\\\").replaceAll("^/|/$", "") +
                             "\"");
                 }
             }
@@ -770,7 +789,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
                 imports.add(createMapping("import", "fmt"));
             }
 
-            if(model.oneOf != null && !model.oneOf.isEmpty() && !addedValidator && generateUnmarshalJSON) {
+            if (model.oneOf != null && !model.oneOf.isEmpty() && !addedValidator && generateUnmarshalJSON) {
                 imports.add(createMapping("import", "gopkg.in/validator.v2"));
                 addedValidator = true;
             }

modules/openapi-generator/src/test/resources/3_0/go/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml

@@ -1268,6 +1268,29 @@ paths:
       responses:
         200:
           description: OK
+  /fake/wrapped-integer-ref:
+    post:
+      operationId: someOpsRequiringRefInt
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required:
+              - ids
+              properties:
+                MyIDs:
+                  type: array
+                  items:
+                    $ref: '#/components/schemas/IDsWrapper/properties/id'
+      responses:
+        '200':
+          description: success
+          content:
+            application/json:
+              schema:
+                type: object
 servers:
   - url: 'http://{server}.swagger.io:{port}/v2'
     description: petstore server
@@ -2191,3 +2214,8 @@ components:
             type: object
         - type: object
         - type: "null"
+    IDsWrapper:
+      type: object
+      properties:
+        id:
+          type: integer

samples/openapi3/client/petstore/go/go-petstore/.openapi-generator/FILES

@@ -48,6 +48,7 @@ docs/FruitReq.md
 docs/GmFruit.md
 docs/HasOnlyReadOnly.md
 docs/HealthCheckResult.md
+docs/IDsWrapper.md
 docs/IncidentData.md
 docs/List.md
 docs/Mammal.md
@@ -75,6 +76,7 @@ docs/PropertyNameMapping.md
 docs/ReadOnlyFirst.md
 docs/ReadOnlyWithDefault.md
 docs/Return.md
+docs/SomeOpsRequiringRefIntRequest.md
 docs/SpecialModelName.md
 docs/StoreAPI.md
 docs/Tag.md
@@ -121,6 +123,7 @@ model_fruit_req.go
 model_gm_fruit.go
 model_has_only_read_only.go
 model_health_check_result.go
+model_ids_wrapper.go
 model_incident_data.go
 model_list.go
 model_mammal.go
@@ -146,6 +149,7 @@ model_property_name_mapping.go
 model_read_only_first.go
 model_read_only_with_default.go
 model_return.go
+model_some_ops_requiring_ref_int_request.go
 model_tag.go
 model_test_inline_freeform_additional_properties_request.go
 model_user.go

samples/openapi3/client/petstore/go/go-petstore/README.md

@@ -81,6 +81,7 @@ Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *AnotherFakeAPI* | [**Call123TestSpecialTags**](docs/AnotherFakeAPI.md#call123testspecialtags) | **Patch** /another-fake/dummy | To test special tags
 *DefaultAPI* | [**FooGet**](docs/DefaultAPI.md#fooget) | **Get** /foo | 
+*DefaultAPI* | [**SomeOpsRequiringRefInt**](docs/DefaultAPI.md#someopsrequiringrefint) | **Post** /fake/wrapped-integer-ref | 
 *FakeAPI* | [**FakeHealthGet**](docs/FakeAPI.md#fakehealthget) | **Get** /fake/health | Health check endpoint
 *FakeAPI* | [**FakeOuterBooleanSerialize**](docs/FakeAPI.md#fakeouterbooleanserialize) | **Post** /fake/outer/boolean | 
 *FakeAPI* | [**FakeOuterCompositeSerialize**](docs/FakeAPI.md#fakeoutercompositeserialize) | **Post** /fake/outer/composite | 
@@ -160,6 +161,7 @@ Class | Method | HTTP request | Description
  - [GmFruit](docs/GmFruit.md)
  - [HasOnlyReadOnly](docs/HasOnlyReadOnly.md)
  - [HealthCheckResult](docs/HealthCheckResult.md)
+ - [IDsWrapper](docs/IDsWrapper.md)
  - [IncidentData](docs/IncidentData.md)
  - [List](docs/List.md)
  - [Mammal](docs/Mammal.md)
@@ -186,6 +188,7 @@ Class | Method | HTTP request | Description
  - [ReadOnlyFirst](docs/ReadOnlyFirst.md)
  - [ReadOnlyWithDefault](docs/ReadOnlyWithDefault.md)
  - [Return](docs/Return.md)
+ - [SomeOpsRequiringRefIntRequest](docs/SomeOpsRequiringRefIntRequest.md)
  - [SpecialModelName](docs/SpecialModelName.md)
  - [Tag](docs/Tag.md)
  - [TestInlineFreeformAdditionalPropertiesRequest](docs/TestInlineFreeformAdditionalPropertiesRequest.md)

samples/openapi3/client/petstore/go/go-petstore/api/openapi.yaml

@@ -1233,6 +1233,22 @@ paths:
       summary: parameter name mapping test
       tags:
       - fake
+  /fake/wrapped-integer-ref:
+    post:
+      operationId: someOpsRequiringRefInt
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/someOpsRequiringRefInt_request'
+        required: true
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                type: object
+          description: success
 components:
   requestBodies:
     UserArray:
@@ -2177,6 +2193,11 @@ components:
           type: object
         type: array
       - type: object
+    IDsWrapper:
+      properties:
+        id:
+          type: integer
+      type: object
     _foo_get_default_response:
       example:
         string:
@@ -2330,6 +2351,15 @@ components:
       required:
       - requiredFile
       type: object
+    someOpsRequiringRefInt_request:
+      properties:
+        MyIDs:
+          items:
+            $ref: '#/components/schemas/IDsWrapper/properties/id'
+          type: array
+      required:
+      - ids
+      type: object
   securitySchemes:
     petstore_auth:
       flows:

samples/openapi3/client/petstore/go/go-petstore/api_default.go

@@ -32,6 +32,18 @@ type DefaultAPI interface {
 	// FooGetExecute executes the request
 	//  @return FooGetDefaultResponse
 	FooGetExecute(r ApiFooGetRequest) (*FooGetDefaultResponse, *http.Response, error)
+
+	/*
+	SomeOpsRequiringRefInt Method for SomeOpsRequiringRefInt
+
+	@param ctx context.Context - for authentication, logging, cancellation, deadlines, tracing, etc. Passed from http.Request or context.Background().
+	@return ApiSomeOpsRequiringRefIntRequest
+	*/
+	SomeOpsRequiringRefInt(ctx context.Context) ApiSomeOpsRequiringRefIntRequest
+
+	// SomeOpsRequiringRefIntExecute executes the request
+	//  @return map[string]interface{}
+	SomeOpsRequiringRefIntExecute(r ApiSomeOpsRequiringRefIntRequest) (map[string]interface{}, *http.Response, error)
 }
 
 // DefaultAPIService DefaultAPI service
@@ -163,3 +175,111 @@ func (a *DefaultAPIService) FooGetExecute(r ApiFooGetRequest) (*FooGetDefaultRes
 
 	return localVarReturnValue, localVarHTTPResponse, nil
 }
+
+type ApiSomeOpsRequiringRefIntRequest struct {
+	ctx context.Context
+	ApiService DefaultAPI
+	someOpsRequiringRefIntRequest *SomeOpsRequiringRefIntRequest
+}
+
+func (r ApiSomeOpsRequiringRefIntRequest) SomeOpsRequiringRefIntRequest(someOpsRequiringRefIntRequest SomeOpsRequiringRefIntRequest) ApiSomeOpsRequiringRefIntRequest {
+	r.someOpsRequiringRefIntRequest = &someOpsRequiringRefIntRequest
+	return r
+}
+
+func (r ApiSomeOpsRequiringRefIntRequest) Execute() (map[string]interface{}, *http.Response, error) {
+	return r.ApiService.SomeOpsRequiringRefIntExecute(r)
+}
+
+/*
+SomeOpsRequiringRefInt Method for SomeOpsRequiringRefInt
+
+ @param ctx context.Context - for authentication, logging, cancellation, deadlines, tracing, etc. Passed from http.Request or context.Background().
+ @return ApiSomeOpsRequiringRefIntRequest
+*/
+func (a *DefaultAPIService) SomeOpsRequiringRefInt(ctx context.Context) ApiSomeOpsRequiringRefIntRequest {
+	return ApiSomeOpsRequiringRefIntRequest{
+		ApiService: a,
+		ctx: ctx,
+	}
+}
+
+// Execute executes the request
+//  @return map[string]interface{}
+func (a *DefaultAPIService) SomeOpsRequiringRefIntExecute(r ApiSomeOpsRequiringRefIntRequest) (map[string]interface{}, *http.Response, error) {
+	var (
+		localVarHTTPMethod   = http.MethodPost
+		localVarPostBody     interface{}
+		formFiles            []formFile
+		localVarReturnValue  map[string]interface{}
+	)
+
+	localBasePath, err := a.client.cfg.ServerURLWithContext(r.ctx, "DefaultAPIService.SomeOpsRequiringRefInt")
+	if err != nil {
+		return localVarReturnValue, nil, &GenericOpenAPIError{error: err.Error()}
+	}
+
+	localVarPath := localBasePath + "/fake/wrapped-integer-ref"
+
+	localVarHeaderParams := make(map[string]string)
+	localVarQueryParams := url.Values{}
+	localVarFormParams := url.Values{}
+	if r.someOpsRequiringRefIntRequest == nil {
+		return localVarReturnValue, nil, reportError("someOpsRequiringRefIntRequest is required and must be specified")
+	}
+
+	// to determine the Content-Type header
+	localVarHTTPContentTypes := []string{"application/json"}
+
+	// set Content-Type header
+	localVarHTTPContentType := selectHeaderContentType(localVarHTTPContentTypes)
+	if localVarHTTPContentType != "" {
+		localVarHeaderParams["Content-Type"] = localVarHTTPContentType
+	}
+
+	// to determine the Accept header
+	localVarHTTPHeaderAccepts := []string{"application/json"}
+
+	// set Accept header
+	localVarHTTPHeaderAccept := selectHeaderAccept(localVarHTTPHeaderAccepts)
+	if localVarHTTPHeaderAccept != "" {
+		localVarHeaderParams["Accept"] = localVarHTTPHeaderAccept
+	}
+	// body params
+	localVarPostBody = r.someOpsRequiringRefIntRequest
+	req, err := a.client.prepareRequest(r.ctx, localVarPath, localVarHTTPMethod, localVarPostBody, localVarHeaderParams, localVarQueryParams, localVarFormParams, formFiles)
+	if err != nil {
+		return localVarReturnValue, nil, err
+	}
+
+	localVarHTTPResponse, err := a.client.callAPI(req)
+	if err != nil || localVarHTTPResponse == nil {
+		return localVarReturnValue, localVarHTTPResponse, err
+	}
+
+	localVarBody, err := io.ReadAll(localVarHTTPResponse.Body)
+	localVarHTTPResponse.Body.Close()
+	localVarHTTPResponse.Body = io.NopCloser(bytes.NewBuffer(localVarBody))
+	if err != nil {
+		return localVarReturnValue, localVarHTTPResponse, err
+	}
+
+	if localVarHTTPResponse.StatusCode >= 300 {
+		newErr := &GenericOpenAPIError{
+			body:  localVarBody,
+			error: localVarHTTPResponse.Status,
+		}
+		return localVarReturnValue, localVarHTTPResponse, newErr
+	}
+
+	err = a.client.decode(&localVarReturnValue, localVarBody, localVarHTTPResponse.Header.Get("Content-Type"))
+	if err != nil {
+		newErr := &GenericOpenAPIError{
+			body:  localVarBody,
+			error: err.Error(),
+		}
+		return localVarReturnValue, localVarHTTPResponse, newErr
+	}
+
+	return localVarReturnValue, localVarHTTPResponse, nil
+}

samples/openapi3/client/petstore/go/go-petstore/docs/DefaultAPI.md

@@ -5,6 +5,7 @@ All URIs are relative to *http://petstore.swagger.io:80/v2*
 Method | HTTP request | Description
 ------------- | ------------- | -------------
 [**FooGet**](DefaultAPI.md#FooGet) | **Get** /foo | 
+[**SomeOpsRequiringRefInt**](DefaultAPI.md#SomeOpsRequiringRefInt) | **Post** /fake/wrapped-integer-ref | 
 
 
 
@@ -66,3 +67,67 @@ No authorization required
 [[Back to Model list]](../README.md#documentation-for-models)
 [[Back to README]](../README.md)
 
+
+## SomeOpsRequiringRefInt
+
+> map[string]interface{} SomeOpsRequiringRefInt(ctx).SomeOpsRequiringRefIntRequest(someOpsRequiringRefIntRequest).Execute()
+
+
+
+### Example
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	openapiclient "github.com/GIT_USER_ID/GIT_REPO_ID"
+)
+
+func main() {
+	someOpsRequiringRefIntRequest := *openapiclient.NewSomeOpsRequiringRefIntRequest() // SomeOpsRequiringRefIntRequest | 
+
+	configuration := openapiclient.NewConfiguration()
+	apiClient := openapiclient.NewAPIClient(configuration)
+	resp, r, err := apiClient.DefaultAPI.SomeOpsRequiringRefInt(context.Background()).SomeOpsRequiringRefIntRequest(someOpsRequiringRefIntRequest).Execute()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error when calling `DefaultAPI.SomeOpsRequiringRefInt``: %v\n", err)
+		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
+	}
+	// response from `SomeOpsRequiringRefInt`: map[string]interface{}
+	fmt.Fprintf(os.Stdout, "Response from `DefaultAPI.SomeOpsRequiringRefInt`: %v\n", resp)
+}
+```
+
+### Path Parameters
+
+
+
+### Other Parameters
+
+Other parameters are passed through a pointer to a apiSomeOpsRequiringRefIntRequest struct via the builder pattern
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **someOpsRequiringRefIntRequest** | [**SomeOpsRequiringRefIntRequest**](SomeOpsRequiringRefIntRequest.md) |  | 
+
+### Return type
+
+**map[string]interface{}**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints)
+[[Back to Model list]](../README.md#documentation-for-models)
+[[Back to README]](../README.md)
+

samples/openapi3/client/petstore/go/go-petstore/docs/IDsWrapper.md

@@ -0,0 +1,56 @@
+# IDsWrapper
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Id** | Pointer to **int32** |  | [optional] 
+
+## Methods
+
+### NewIDsWrapper
+
+`func NewIDsWrapper() *IDsWrapper`
+
+NewIDsWrapper instantiates a new IDsWrapper object
+This constructor will assign default values to properties that have it defined,
+and makes sure properties required by API are set, but the set of arguments
+will change when the set of required properties is changed
+
+### NewIDsWrapperWithDefaults
+
+`func NewIDsWrapperWithDefaults() *IDsWrapper`
+
+NewIDsWrapperWithDefaults instantiates a new IDsWrapper object
+This constructor will only assign default values to properties that have it defined,
+but it doesn't guarantee that properties required by API are set
+
+### GetId
+
+`func (o *IDsWrapper) GetId() int32`
+
+GetId returns the Id field if non-nil, zero value otherwise.
+
+### GetIdOk
+
+`func (o *IDsWrapper) GetIdOk() (*int32, bool)`
+
+GetIdOk returns a tuple with the Id field if it's non-nil, zero value otherwise
+and a boolean to check if the value has been set.
+
+### SetId
+
+`func (o *IDsWrapper) SetId(v int32)`
+
+SetId sets Id field to given value.
+
+### HasId
+
+`func (o *IDsWrapper) HasId() bool`
+
+HasId returns a boolean if a field has been set.
+
+
+[[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/go/go-petstore/docs/SomeOpsRequiringRefIntRequest.md

@@ -0,0 +1,56 @@
+# SomeOpsRequiringRefIntRequest
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**MyIDs** | Pointer to **[]int32** |  | [optional] 
+
+## Methods
+
+### NewSomeOpsRequiringRefIntRequest
+
+`func NewSomeOpsRequiringRefIntRequest() *SomeOpsRequiringRefIntRequest`
+
+NewSomeOpsRequiringRefIntRequest instantiates a new SomeOpsRequiringRefIntRequest object
+This constructor will assign default values to properties that have it defined,
+and makes sure properties required by API are set, but the set of arguments
+will change when the set of required properties is changed
+
+### NewSomeOpsRequiringRefIntRequestWithDefaults
+
+`func NewSomeOpsRequiringRefIntRequestWithDefaults() *SomeOpsRequiringRefIntRequest`
+
+NewSomeOpsRequiringRefIntRequestWithDefaults instantiates a new SomeOpsRequiringRefIntRequest object
+This constructor will only assign default values to properties that have it defined,
+but it doesn't guarantee that properties required by API are set
+
+### GetMyIDs
+
+`func (o *SomeOpsRequiringRefIntRequest) GetMyIDs() []int32`
+
+GetMyIDs returns the MyIDs field if non-nil, zero value otherwise.
+
+### GetMyIDsOk
+
+`func (o *SomeOpsRequiringRefIntRequest) GetMyIDsOk() (*[]int32, bool)`
+
+GetMyIDsOk returns a tuple with the MyIDs field if it's non-nil, zero value otherwise
+and a boolean to check if the value has been set.
+
+### SetMyIDs
+
+`func (o *SomeOpsRequiringRefIntRequest) SetMyIDs(v []int32)`
+
+SetMyIDs sets MyIDs field to given value.
+
+### HasMyIDs
+
+`func (o *SomeOpsRequiringRefIntRequest) HasMyIDs() bool`
+
+HasMyIDs returns a boolean if a field has been set.
+
+
+[[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/go/go-petstore/model_ids_wrapper.go

@@ -0,0 +1,155 @@
+/*
+OpenAPI Petstore
+
+This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+API version: 1.0.0
+*/
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package petstore
+
+import (
+	"encoding/json"
+)
+
+// checks if the IDsWrapper type satisfies the MappedNullable interface at compile time
+var _ MappedNullable = &IDsWrapper{}
+
+// IDsWrapper struct for IDsWrapper
+type IDsWrapper struct {
+	Id *int32 `json:"id,omitempty"`
+	AdditionalProperties map[string]interface{}
+}
+
+type _IDsWrapper IDsWrapper
+
+// NewIDsWrapper instantiates a new IDsWrapper object
+// This constructor will assign default values to properties that have it defined,
+// and makes sure properties required by API are set, but the set of arguments
+// will change when the set of required properties is changed
+func NewIDsWrapper() *IDsWrapper {
+	this := IDsWrapper{}
+	return &this
+}
+
+// NewIDsWrapperWithDefaults instantiates a new IDsWrapper object
+// This constructor will only assign default values to properties that have it defined,
+// but it doesn't guarantee that properties required by API are set
+func NewIDsWrapperWithDefaults() *IDsWrapper {
+	this := IDsWrapper{}
+	return &this
+}
+
+// GetId returns the Id field value if set, zero value otherwise.
+func (o *IDsWrapper) GetId() int32 {
+	if o == nil || IsNil(o.Id) {
+		var ret int32
+		return ret
+	}
+	return *o.Id
+}
+
+// GetIdOk returns a tuple with the Id field value if set, nil otherwise
+// and a boolean to check if the value has been set.
+func (o *IDsWrapper) GetIdOk() (*int32, bool) {
+	if o == nil || IsNil(o.Id) {
+		return nil, false
+	}
+	return o.Id, true
+}
+
+// HasId returns a boolean if a field has been set.
+func (o *IDsWrapper) HasId() bool {
+	if o != nil && !IsNil(o.Id) {
+		return true
+	}
+
+	return false
+}
+
+// SetId gets a reference to the given int32 and assigns it to the Id field.
+func (o *IDsWrapper) SetId(v int32) {
+	o.Id = &v
+}
+
+func (o IDsWrapper) MarshalJSON() ([]byte, error) {
+	toSerialize,err := o.ToMap()
+	if err != nil {
+		return []byte{}, err
+	}
+	return json.Marshal(toSerialize)
+}
+
+func (o IDsWrapper) ToMap() (map[string]interface{}, error) {
+	toSerialize := map[string]interface{}{}
+	if !IsNil(o.Id) {
+		toSerialize["id"] = o.Id
+	}
+
+	for key, value := range o.AdditionalProperties {
+		toSerialize[key] = value
+	}
+
+	return toSerialize, nil
+}
+
+func (o *IDsWrapper) UnmarshalJSON(data []byte) (err error) {
+	varIDsWrapper := _IDsWrapper{}
+
+	err = json.Unmarshal(data, &varIDsWrapper)
+
+	if err != nil {
+		return err
+	}
+
+	*o = IDsWrapper(varIDsWrapper)
+
+	additionalProperties := make(map[string]interface{})
+
+	if err = json.Unmarshal(data, &additionalProperties); err == nil {
+		delete(additionalProperties, "id")
+		o.AdditionalProperties = additionalProperties
+	}
+
+	return err
+}
+
+type NullableIDsWrapper struct {
+	value *IDsWrapper
+	isSet bool
+}
+
+func (v NullableIDsWrapper) Get() *IDsWrapper {
+	return v.value
+}
+
+func (v *NullableIDsWrapper) Set(val *IDsWrapper) {
+	v.value = val
+	v.isSet = true
+}
+
+func (v NullableIDsWrapper) IsSet() bool {
+	return v.isSet
+}
+
+func (v *NullableIDsWrapper) Unset() {
+	v.value = nil
+	v.isSet = false
+}
+
+func NewNullableIDsWrapper(val *IDsWrapper) *NullableIDsWrapper {
+	return &NullableIDsWrapper{value: val, isSet: true}
+}
+
+func (v NullableIDsWrapper) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.value)
+}
+
+func (v *NullableIDsWrapper) UnmarshalJSON(src []byte) error {
+	v.isSet = true
+	return json.Unmarshal(src, &v.value)
+}
+
+

samples/openapi3/client/petstore/go/go-petstore/model_some_ops_requiring_ref_int_request.go

@@ -0,0 +1,155 @@
+/*
+OpenAPI Petstore
+
+This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+API version: 1.0.0
+*/
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package petstore
+
+import (
+	"encoding/json"
+)
+
+// checks if the SomeOpsRequiringRefIntRequest type satisfies the MappedNullable interface at compile time
+var _ MappedNullable = &SomeOpsRequiringRefIntRequest{}
+
+// SomeOpsRequiringRefIntRequest struct for SomeOpsRequiringRefIntRequest
+type SomeOpsRequiringRefIntRequest struct {
+	MyIDs []int32 `json:"MyIDs,omitempty"`
+	AdditionalProperties map[string]interface{}
+}
+
+type _SomeOpsRequiringRefIntRequest SomeOpsRequiringRefIntRequest
+
+// NewSomeOpsRequiringRefIntRequest instantiates a new SomeOpsRequiringRefIntRequest object
+// This constructor will assign default values to properties that have it defined,
+// and makes sure properties required by API are set, but the set of arguments
+// will change when the set of required properties is changed
+func NewSomeOpsRequiringRefIntRequest() *SomeOpsRequiringRefIntRequest {
+	this := SomeOpsRequiringRefIntRequest{}
+	return &this
+}
+
+// NewSomeOpsRequiringRefIntRequestWithDefaults instantiates a new SomeOpsRequiringRefIntRequest object
+// This constructor will only assign default values to properties that have it defined,
+// but it doesn't guarantee that properties required by API are set
+func NewSomeOpsRequiringRefIntRequestWithDefaults() *SomeOpsRequiringRefIntRequest {
+	this := SomeOpsRequiringRefIntRequest{}
+	return &this
+}
+
+// GetMyIDs returns the MyIDs field value if set, zero value otherwise.
+func (o *SomeOpsRequiringRefIntRequest) GetMyIDs() []int32 {
+	if o == nil || IsNil(o.MyIDs) {
+		var ret []int32
+		return ret
+	}
+	return o.MyIDs
+}
+
+// GetMyIDsOk returns a tuple with the MyIDs field value if set, nil otherwise
+// and a boolean to check if the value has been set.
+func (o *SomeOpsRequiringRefIntRequest) GetMyIDsOk() ([]int32, bool) {
+	if o == nil || IsNil(o.MyIDs) {
+		return nil, false
+	}
+	return o.MyIDs, true
+}
+
+// HasMyIDs returns a boolean if a field has been set.
+func (o *SomeOpsRequiringRefIntRequest) HasMyIDs() bool {
+	if o != nil && !IsNil(o.MyIDs) {
+		return true
+	}
+
+	return false
+}
+
+// SetMyIDs gets a reference to the given []int32 and assigns it to the MyIDs field.
+func (o *SomeOpsRequiringRefIntRequest) SetMyIDs(v []int32) {
+	o.MyIDs = v
+}
+
+func (o SomeOpsRequiringRefIntRequest) MarshalJSON() ([]byte, error) {
+	toSerialize,err := o.ToMap()
+	if err != nil {
+		return []byte{}, err
+	}
+	return json.Marshal(toSerialize)
+}
+
+func (o SomeOpsRequiringRefIntRequest) ToMap() (map[string]interface{}, error) {
+	toSerialize := map[string]interface{}{}
+	if !IsNil(o.MyIDs) {
+		toSerialize["MyIDs"] = o.MyIDs
+	}
+
+	for key, value := range o.AdditionalProperties {
+		toSerialize[key] = value
+	}
+
+	return toSerialize, nil
+}
+
+func (o *SomeOpsRequiringRefIntRequest) UnmarshalJSON(data []byte) (err error) {
+	varSomeOpsRequiringRefIntRequest := _SomeOpsRequiringRefIntRequest{}
+
+	err = json.Unmarshal(data, &varSomeOpsRequiringRefIntRequest)
+
+	if err != nil {
+		return err
+	}
+
+	*o = SomeOpsRequiringRefIntRequest(varSomeOpsRequiringRefIntRequest)
+
+	additionalProperties := make(map[string]interface{})
+
+	if err = json.Unmarshal(data, &additionalProperties); err == nil {
+		delete(additionalProperties, "MyIDs")
+		o.AdditionalProperties = additionalProperties
+	}
+
+	return err
+}
+
+type NullableSomeOpsRequiringRefIntRequest struct {
+	value *SomeOpsRequiringRefIntRequest
+	isSet bool
+}
+
+func (v NullableSomeOpsRequiringRefIntRequest) Get() *SomeOpsRequiringRefIntRequest {
+	return v.value
+}
+
+func (v *NullableSomeOpsRequiringRefIntRequest) Set(val *SomeOpsRequiringRefIntRequest) {
+	v.value = val
+	v.isSet = true
+}
+
+func (v NullableSomeOpsRequiringRefIntRequest) IsSet() bool {
+	return v.isSet
+}
+
+func (v *NullableSomeOpsRequiringRefIntRequest) Unset() {
+	v.value = nil
+	v.isSet = false
+}
+
+func NewNullableSomeOpsRequiringRefIntRequest(val *SomeOpsRequiringRefIntRequest) *NullableSomeOpsRequiringRefIntRequest {
+	return &NullableSomeOpsRequiringRefIntRequest{value: val, isSet: true}
+}
+
+func (v NullableSomeOpsRequiringRefIntRequest) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.value)
+}
+
+func (v *NullableSomeOpsRequiringRefIntRequest) UnmarshalJSON(src []byte) error {
+	v.isSet = true
+	return json.Unmarshal(src, &v.value)
+}
+
+