Implement GetActualInstanceValue method (#20663)

modules/openapi-generator/src/main/resources/go/client.mustache

@@ -137,6 +137,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

modules/openapi-generator/src/main/resources/go/model_oneof.mustache

@@ -145,4 +145,16 @@ func (obj *{{classname}}) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj {{classname}}) GetActualInstanceValue() (interface{}) {
+{{#oneOf}}
+	if obj.{{#lambda.type-to-name}}{{{.}}}{{/lambda.type-to-name}} != nil {
+		return *obj.{{#lambda.type-to-name}}{{{.}}}{{/lambda.type-to-name}}
+	}
+
+{{/oneOf}}
+	// all schemas are nil
+	return nil
+}
+
 {{>nullable_model}}

samples/client/echo_api/go-external-refs/client.go

@@ -143,6 +143,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

samples/client/echo_api/go/client.go

@@ -143,6 +143,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

samples/client/others/go/allof_multiple_ref_and_discriminator/client.go

@@ -124,6 +124,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

samples/client/others/go/oneof-anyof-required/client.go

@@ -124,6 +124,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

samples/client/others/go/oneof-anyof-required/model_object.go

@@ -118,6 +118,20 @@ func (obj *Object) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj Object) GetActualInstanceValue() (interface{}) {
+	if obj.NestedObject1 != nil {
+		return *obj.NestedObject1
+	}
+
+	if obj.NestedObject2 != nil {
+		return *obj.NestedObject2
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableObject struct {
 	value *Object
 	isSet bool

samples/client/others/go/oneof-discriminator-lookup/client.go

@@ -124,6 +124,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

samples/client/others/go/oneof-discriminator-lookup/model_object.go

@@ -127,6 +127,20 @@ func (obj *Object) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj Object) GetActualInstanceValue() (interface{}) {
+	if obj.NestedObject1 != nil {
+		return *obj.NestedObject1
+	}
+
+	if obj.NestedObject2 != nil {
+		return *obj.NestedObject2
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableObject struct {
 	value *Object
 	isSet bool

samples/client/petstore/go/go-petstore/client.go

@@ -143,6 +143,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

samples/openapi3/client/extensions/x-auth-id-alias/go-experimental/client.go

@@ -127,6 +127,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

samples/openapi3/client/petstore/go-petstore-generateMarshalJSON-false/client.go

@@ -128,6 +128,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

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

@@ -146,6 +146,10 @@ func typeCheckParameter(obj interface{}, expected string, name string) error {
 
 func parameterValueToString( obj interface{}, key string ) string {
 	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
+		if actualObj, ok := obj.(interface{ GetActualInstanceValue() interface{} }); ok {
+			return fmt.Sprintf("%v", actualObj.GetActualInstanceValue())
+		}
+
 		return fmt.Sprintf("%v", obj)
 	}
 	var param,ok = obj.(MappedNullable)

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

@@ -118,6 +118,20 @@ func (obj *Fruit) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj Fruit) GetActualInstanceValue() (interface{}) {
+	if obj.Apple != nil {
+		return *obj.Apple
+	}
+
+	if obj.Banana != nil {
+		return *obj.Banana
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableFruit struct {
 	value *Fruit
 	isSet bool

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

@@ -118,6 +118,20 @@ func (obj *FruitReq) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj FruitReq) GetActualInstanceValue() (interface{}) {
+	if obj.AppleReq != nil {
+		return *obj.AppleReq
+	}
+
+	if obj.BananaReq != nil {
+		return *obj.BananaReq
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableFruitReq struct {
 	value *FruitReq
 	isSet bool

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

@@ -123,6 +123,20 @@ func (obj *IncidentData) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj IncidentData) GetActualInstanceValue() (interface{}) {
+	if obj.ArrayOfMapmapOfStringAny != nil {
+		return *obj.ArrayOfMapmapOfStringAny
+	}
+
+	if obj.MapmapOfStringAny != nil {
+		return *obj.MapmapOfStringAny
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableIncidentData struct {
 	value *IncidentData
 	isSet bool

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

@@ -118,6 +118,20 @@ func (obj *Mammal) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj Mammal) GetActualInstanceValue() (interface{}) {
+	if obj.Whale != nil {
+		return *obj.Whale
+	}
+
+	if obj.Zebra != nil {
+		return *obj.Zebra
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableMammal struct {
 	value *Mammal
 	isSet bool

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

@@ -152,6 +152,24 @@ func (obj *OneOfPrimitiveType) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj OneOfPrimitiveType) GetActualInstanceValue() (interface{}) {
+	if obj.OneOfPrimitiveTypeChild != nil {
+		return *obj.OneOfPrimitiveTypeChild
+	}
+
+	if obj.ArrayOfString != nil {
+		return *obj.ArrayOfString
+	}
+
+	if obj.Int32 != nil {
+		return *obj.Int32
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableOneOfPrimitiveType struct {
 	value *OneOfPrimitiveType
 	isSet bool

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

@@ -119,6 +119,20 @@ func (obj *OneOfPrimitiveTypes) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj OneOfPrimitiveTypes) GetActualInstanceValue() (interface{}) {
+	if obj.String != nil {
+		return *obj.String
+	}
+
+	if obj.TimeTime != nil {
+		return *obj.TimeTime
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableOneOfPrimitiveTypes struct {
 	value *OneOfPrimitiveTypes
 	isSet bool

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

@@ -118,6 +118,20 @@ func (obj *OneOfWithComplexType) GetActualInstance() (interface{}) {
 	return nil
 }
 
+// Get the actual instance value
+func (obj OneOfWithComplexType) GetActualInstanceValue() (interface{}) {
+	if obj.ArrayOfString != nil {
+		return *obj.ArrayOfString
+	}
+
+	if obj.String != nil {
+		return *obj.String
+	}
+
+	// all schemas are nil
+	return nil
+}
+
 type NullableOneOfWithComplexType struct {
 	value *OneOfWithComplexType
 	isSet bool