[BUG][Go-server] attempt to fix the controller-api mustache template for a nullable bodyParam (#20478)

* go-server: attempt  to fix the controller-api mustache template for a nullable bodyParam

* added to petstore an example to trigger the issue which this PR fixes

modules/openapi-generator/src/main/resources/go-server/controller-api.mustache

@@ -624,7 +624,7 @@ func (c *{{classname}}Controller) {{nickname}}(w http.ResponseWriter, r *http.Re
 	{{/isArray}}
 	{{/isBodyParam}}
 	{{/allParams}}
-	result, err := c.service.{{nickname}}(r.Context(){{#allParams}}, {{paramName}}Param{{/allParams}})
+	result, err := c.service.{{nickname}}(r.Context(){{#allParams}}, {{#isNullable}}{{#isBodyParam}}&{{/isBodyParam}}{{/isNullable}}{{paramName}}Param{{/allParams}})
 	// If an error occurred, encode the error with the status code
 	if err != nil {
 		c.errorHandler(w, r, err, &result)

modules/openapi-generator/src/test/resources/3_0/go-server/petstore.yaml

@@ -582,6 +582,24 @@ paths:
               $ref: '#/components/schemas/User'
         description: Created user object
         required: true
+    put:
+      tags:
+        - user
+      summary: Create user
+      description: This can only be done by the logged in user.
+      operationId: createUserNullable
+      responses:
+        default:
+          description: successful operation
+      security:
+        - api_key: []
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UserNullable'
+        description: Created user object, with a nullable bodyParam
+        required: true
   /user/createWithArray:
     post:
       tags:
@@ -1052,6 +1070,66 @@ components:
         name: User
       required:
         - deepSliceModel
+    UserNullable:
+      title: a User
+      description: A User who is purchasing from the pet store
+      type: object
+      nullable: true
+      properties:
+        id:
+          type: integer
+          format: int64
+        username:
+          type: string
+        firstName:
+          type: string
+        lastName:
+          type: string
+        email:
+          type: string
+        password:
+          type: string
+        phone:
+          type: string
+          nullable: true
+        userStatus:
+          type: integer
+          format: int32
+          description: User Status
+        deepSliceModel:
+          nullable: true
+          type: array
+          description: An array 1-deep.
+          items:
+            type: array
+            description: An array 2-deep.
+            items:
+              type: array
+              description: An array 3-deep.
+              items:
+                $ref: '#/components/schemas/Tag'
+        deepSliceMap:
+          type: array
+          description: An array 1-deep.
+          items:
+            type: array
+            description: An array 2-deep.
+            items:
+              title: an Object
+              type: object
+              description: An array 3-deep.
+              properties:
+                tag:
+                  $ref: '#/components/schemas/Tag'
+                Pet:
+                  type: array
+                  description: An array of pet.
+                  items:
+                    $ref: '#/components/schemas/Pet'
+      xml:
+        name: User
+      required:
+        - deepSliceModel
     Tag:
       title: Pet Tag
       description: A tag for a pet

samples/server/petstore/go-api-server/.openapi-generator/FILES

@@ -27,5 +27,6 @@ go/model_special_info.go
 go/model_species.go
 go/model_tag.go
 go/model_user.go
+go/model_user_nullable.go
 go/routers.go
 main.go

samples/server/petstore/go-api-server/api/openapi.yaml

@@ -605,6 +605,24 @@ paths:
       summary: Create user
       tags:
       - user
+    put:
+      description: This can only be done by the logged in user.
+      operationId: createUserNullable
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UserNullable'
+        description: "Created user object, with a nullable bodyParam"
+        required: true
+      responses:
+        default:
+          description: successful operation
+      security:
+      - api_key: []
+      summary: Create user
+      tags:
+      - user
   /user/createWithArray:
     post:
       description: ""
@@ -1240,6 +1258,211 @@ components:
       type: object
       xml:
         name: User
+    UserNullable:
+      description: A User who is purchasing from the pet store
+      example:
+        firstName: firstName
+        lastName: lastName
+        password: password
+        userStatus: 6
+        phone: phone
+        deepSliceModel:
+        - - - name: name
+              id: 1
+            - name: name
+              id: 1
+          - - name: name
+              id: 1
+            - name: name
+              id: 1
+        - - - name: name
+              id: 1
+            - name: name
+              id: 1
+          - - name: name
+              id: 1
+            - name: name
+              id: 1
+        id: 0
+        deepSliceMap:
+        - - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+          - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+        - - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+          - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+        email: email
+        username: username
+      nullable: true
+      properties:
+        id:
+          format: int64
+          type: integer
+        username:
+          type: string
+        firstName:
+          type: string
+        lastName:
+          type: string
+        email:
+          type: string
+        password:
+          type: string
+        phone:
+          nullable: true
+          type: string
+        userStatus:
+          description: User Status
+          format: int32
+          type: integer
+        deepSliceModel:
+          description: An array 1-deep.
+          items:
+            description: An array 2-deep.
+            items:
+              description: An array 3-deep.
+              items:
+                $ref: '#/components/schemas/Tag'
+              type: array
+            type: array
+          nullable: true
+          type: array
+        deepSliceMap:
+          description: An array 1-deep.
+          items:
+            description: An array 2-deep.
+            items:
+              $ref: '#/components/schemas/an_Object'
+            type: array
+          type: array
+      required:
+      - deepSliceModel
+      title: a User
+      type: object
+      xml:
+        name: User
     Tag:
       description: A tag for a pet
       example:

samples/server/petstore/go-api-server/go/api.go

@@ -58,6 +58,7 @@ type StoreAPIRouter interface {
 // The UserAPIRouter implementation should parse necessary information from the http request,
 // pass the data to a UserAPIServicer to perform the required actions, then write the service results to the http response.
 type UserAPIRouter interface { 
+	CreateUserNullable(http.ResponseWriter, *http.Request)
 	CreateUser(http.ResponseWriter, *http.Request)
 	CreateUsersWithArrayInput(http.ResponseWriter, *http.Request)
 	CreateUsersWithListInput(http.ResponseWriter, *http.Request)
@@ -118,6 +119,7 @@ type StoreAPIServicer interface {
 // while the service implementation can be ignored with the .openapi-generator-ignore file
 // and updated with the logic required for the API.
 type UserAPIServicer interface { 
+	CreateUserNullable(context.Context, *UserNullable) (ImplResponse, error)
 	CreateUser(context.Context, User) (ImplResponse, error)
 	CreateUsersWithArrayInput(context.Context, []User) (ImplResponse, error)
 	CreateUsersWithListInput(context.Context, []User) (ImplResponse, error)

samples/server/petstore/go-api-server/go/api_user.go

@@ -51,6 +51,11 @@ func NewUserAPIController(s UserAPIServicer, opts ...UserAPIOption) *UserAPICont
 // Routes returns all the api routes for the UserAPIController
 func (c *UserAPIController) Routes() Routes {
 	return Routes{
+		"CreateUserNullable": Route{
+			strings.ToUpper("Put"),
+			"/v2/user",
+			c.CreateUserNullable,
+		},
 		"CreateUser": Route{
 			strings.ToUpper("Post"),
 			"/v2/user",
@@ -94,6 +99,33 @@ func (c *UserAPIController) Routes() Routes {
 	}
 }
 
+// CreateUserNullable - Create user
+func (c *UserAPIController) CreateUserNullable(w http.ResponseWriter, r *http.Request) {
+	var userNullableParam UserNullable
+	d := json.NewDecoder(r.Body)
+	d.DisallowUnknownFields()
+	if err := d.Decode(&userNullableParam); err != nil {
+		c.errorHandler(w, r, &ParsingError{Err: err}, nil)
+		return
+	}
+	if err := AssertUserNullableRequired(userNullableParam); err != nil {
+		c.errorHandler(w, r, err, nil)
+		return
+	}
+	if err := AssertUserNullableConstraints(userNullableParam); err != nil {
+		c.errorHandler(w, r, err, nil)
+		return
+	}
+	result, err := c.service.CreateUserNullable(r.Context(), &userNullableParam)
+	// If an error occurred, encode the error with the status code
+	if err != nil {
+		c.errorHandler(w, r, err, &result)
+		return
+	}
+	// If no error, encode the body and the result code
+	_ = EncodeJSONResponse(result.Body, &result.Code, result.Headers, w)
+}
+
 // CreateUser - Create user
 func (c *UserAPIController) CreateUser(w http.ResponseWriter, r *http.Request) {
 	var userParam User

samples/server/petstore/go-api-server/go/api_user_service.go

@@ -27,6 +27,17 @@ func NewUserAPIService() *UserAPIService {
 	return &UserAPIService{}
 }
 
+// CreateUserNullable - Create user
+func (s *UserAPIService) CreateUserNullable(ctx context.Context, userNullable *UserNullable) (ImplResponse, error) {
+	// TODO - update CreateUserNullable with the required logic for this service method.
+	// Add api_user_service.go to the .openapi-generator-ignore to avoid overwriting this service implementation when updating open api generation.
+
+	// TODO: Uncomment the next line to return response Response(0, {}) or use other options such as http.Ok ...
+	// return Response(0, nil),nil
+
+	return Response(http.StatusNotImplemented, nil), errors.New("CreateUserNullable method not implemented")
+}
+
 // CreateUser - Create user
 func (s *UserAPIService) CreateUser(ctx context.Context, user User) (ImplResponse, error) {
 	// TODO - update CreateUser with the required logic for this service method.

samples/server/petstore/go-api-server/go/model_user_nullable.go

@@ -0,0 +1,76 @@
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+/*
+ * OpenAPI Petstore
+ *
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * API version: 1.0.0
+ */
+
+package petstoreserver
+
+
+
+
+// UserNullable - A User who is purchasing from the pet store
+type UserNullable struct {
+
+	Id int64 `json:"id,omitempty"`
+
+	Username string `json:"username,omitempty"`
+
+	FirstName string `json:"firstName,omitempty"`
+
+	LastName string `json:"lastName,omitempty"`
+
+	Email string `json:"email,omitempty"`
+
+	Password string `json:"password,omitempty"`
+
+	Phone *string `json:"phone,omitempty"`
+
+	// User Status
+	UserStatus int32 `json:"userStatus,omitempty"`
+
+	// An array 1-deep.
+	DeepSliceModel *[][][]Tag `json:"deepSliceModel"`
+
+	// An array 1-deep.
+	DeepSliceMap [][]AnObject `json:"deepSliceMap,omitempty"`
+}
+
+// AssertUserNullableRequired checks if the required fields are not zero-ed
+func AssertUserNullableRequired(obj UserNullable) error {
+	elements := map[string]interface{}{
+		"deepSliceModel": obj.DeepSliceModel,
+	}
+	for name, el := range elements {
+		if isZero := IsZeroValue(el); isZero {
+			return &RequiredError{Field: name}
+		}
+	}
+
+	if obj.DeepSliceModel != nil {
+		if err := AssertRecurseInterfaceRequired(*obj.DeepSliceModel, AssertTagRequired); err != nil {
+			return err
+		}
+	}
+	if err := AssertRecurseInterfaceRequired(obj.DeepSliceMap, AssertAnObjectRequired); err != nil {
+		return err
+	}
+	return nil
+}
+
+// AssertUserNullableConstraints checks if the values respects the defined constraints
+func AssertUserNullableConstraints(obj UserNullable) error {
+    if obj.DeepSliceModel != nil {
+     	if err := AssertRecurseInterfaceRequired(*obj.DeepSliceModel, AssertTagConstraints); err != nil {
+     		return err
+     	}
+    }
+	if err := AssertRecurseInterfaceRequired(obj.DeepSliceMap, AssertAnObjectConstraints); err != nil {
+		return err
+	}
+	return nil
+}

samples/server/petstore/go-chi-server/.openapi-generator/FILES

@@ -27,5 +27,6 @@ go/model_special_info.go
 go/model_species.go
 go/model_tag.go
 go/model_user.go
+go/model_user_nullable.go
 go/routers.go
 main.go

samples/server/petstore/go-chi-server/api/openapi.yaml

@@ -605,6 +605,24 @@ paths:
       summary: Create user
       tags:
       - user
+    put:
+      description: This can only be done by the logged in user.
+      operationId: createUserNullable
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UserNullable'
+        description: "Created user object, with a nullable bodyParam"
+        required: true
+      responses:
+        default:
+          description: successful operation
+      security:
+      - api_key: []
+      summary: Create user
+      tags:
+      - user
   /user/createWithArray:
     post:
       description: ""
@@ -1240,6 +1258,211 @@ components:
       type: object
       xml:
         name: User
+    UserNullable:
+      description: A User who is purchasing from the pet store
+      example:
+        firstName: firstName
+        lastName: lastName
+        password: password
+        userStatus: 6
+        phone: phone
+        deepSliceModel:
+        - - - name: name
+              id: 1
+            - name: name
+              id: 1
+          - - name: name
+              id: 1
+            - name: name
+              id: 1
+        - - - name: name
+              id: 1
+            - name: name
+              id: 1
+          - - name: name
+              id: 1
+            - name: name
+              id: 1
+        id: 0
+        deepSliceMap:
+        - - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+          - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+        - - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+          - tag:
+              name: name
+              id: 1
+            Pet:
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+            - photoUrls:
+              - photoUrls
+              - photoUrls
+              name: doggie
+              id: 0
+              category:
+                name: name
+                id: 6
+              tags:
+              - name: name
+                id: 1
+              - name: name
+                id: 1
+              status: available
+        email: email
+        username: username
+      nullable: true
+      properties:
+        id:
+          format: int64
+          type: integer
+        username:
+          type: string
+        firstName:
+          type: string
+        lastName:
+          type: string
+        email:
+          type: string
+        password:
+          type: string
+        phone:
+          nullable: true
+          type: string
+        userStatus:
+          description: User Status
+          format: int32
+          type: integer
+        deepSliceModel:
+          description: An array 1-deep.
+          items:
+            description: An array 2-deep.
+            items:
+              description: An array 3-deep.
+              items:
+                $ref: '#/components/schemas/Tag'
+              type: array
+            type: array
+          nullable: true
+          type: array
+        deepSliceMap:
+          description: An array 1-deep.
+          items:
+            description: An array 2-deep.
+            items:
+              $ref: '#/components/schemas/an_Object'
+            type: array
+          type: array
+      required:
+      - deepSliceModel
+      title: a User
+      type: object
+      xml:
+        name: User
     Tag:
       description: A tag for a pet
       example:

samples/server/petstore/go-chi-server/go/api.go

@@ -58,6 +58,7 @@ type StoreAPIRouter interface {
 // The UserAPIRouter implementation should parse necessary information from the http request,
 // pass the data to a UserAPIServicer to perform the required actions, then write the service results to the http response.
 type UserAPIRouter interface { 
+	CreateUserNullable(http.ResponseWriter, *http.Request)
 	CreateUser(http.ResponseWriter, *http.Request)
 	CreateUsersWithArrayInput(http.ResponseWriter, *http.Request)
 	CreateUsersWithListInput(http.ResponseWriter, *http.Request)
@@ -118,6 +119,7 @@ type StoreAPIServicer interface {
 // while the service implementation can be ignored with the .openapi-generator-ignore file
 // and updated with the logic required for the API.
 type UserAPIServicer interface { 
+	CreateUserNullable(context.Context, *UserNullable) (ImplResponse, error)
 	CreateUser(context.Context, User) (ImplResponse, error)
 	CreateUsersWithArrayInput(context.Context, []User) (ImplResponse, error)
 	CreateUsersWithListInput(context.Context, []User) (ImplResponse, error)

samples/server/petstore/go-chi-server/go/api_user.go

@@ -51,6 +51,11 @@ func NewUserAPIController(s UserAPIServicer, opts ...UserAPIOption) *UserAPICont
 // Routes returns all the api routes for the UserAPIController
 func (c *UserAPIController) Routes() Routes {
 	return Routes{
+		"CreateUserNullable": Route{
+			strings.ToUpper("Put"),
+			"/v2/user",
+			c.CreateUserNullable,
+		},
 		"CreateUser": Route{
 			strings.ToUpper("Post"),
 			"/v2/user",
@@ -94,6 +99,33 @@ func (c *UserAPIController) Routes() Routes {
 	}
 }
 
+// CreateUserNullable - Create user
+func (c *UserAPIController) CreateUserNullable(w http.ResponseWriter, r *http.Request) {
+	var userNullableParam UserNullable
+	d := json.NewDecoder(r.Body)
+	d.DisallowUnknownFields()
+	if err := d.Decode(&userNullableParam); err != nil {
+		c.errorHandler(w, r, &ParsingError{Err: err}, nil)
+		return
+	}
+	if err := AssertUserNullableRequired(userNullableParam); err != nil {
+		c.errorHandler(w, r, err, nil)
+		return
+	}
+	if err := AssertUserNullableConstraints(userNullableParam); err != nil {
+		c.errorHandler(w, r, err, nil)
+		return
+	}
+	result, err := c.service.CreateUserNullable(r.Context(), &userNullableParam)
+	// If an error occurred, encode the error with the status code
+	if err != nil {
+		c.errorHandler(w, r, err, &result)
+		return
+	}
+	// If no error, encode the body and the result code
+	_ = EncodeJSONResponse(result.Body, &result.Code, result.Headers, w)
+}
+
 // CreateUser - Create user
 func (c *UserAPIController) CreateUser(w http.ResponseWriter, r *http.Request) {
 	var userParam User

samples/server/petstore/go-chi-server/go/api_user_service.go

@@ -27,6 +27,17 @@ func NewUserAPIService() *UserAPIService {
 	return &UserAPIService{}
 }
 
+// CreateUserNullable - Create user
+func (s *UserAPIService) CreateUserNullable(ctx context.Context, userNullable *UserNullable) (ImplResponse, error) {
+	// TODO - update CreateUserNullable with the required logic for this service method.
+	// Add api_user_service.go to the .openapi-generator-ignore to avoid overwriting this service implementation when updating open api generation.
+
+	// TODO: Uncomment the next line to return response Response(0, {}) or use other options such as http.Ok ...
+	// return Response(0, nil),nil
+
+	return Response(http.StatusNotImplemented, nil), errors.New("CreateUserNullable method not implemented")
+}
+
 // CreateUser - Create user
 func (s *UserAPIService) CreateUser(ctx context.Context, user User) (ImplResponse, error) {
 	// TODO - update CreateUser with the required logic for this service method.

samples/server/petstore/go-chi-server/go/model_user_nullable.go

@@ -0,0 +1,76 @@
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+/*
+ * OpenAPI Petstore
+ *
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * API version: 1.0.0
+ */
+
+package petstoreserver
+
+
+
+
+// UserNullable - A User who is purchasing from the pet store
+type UserNullable struct {
+
+	Id int64 `json:"id,omitempty"`
+
+	Username string `json:"username,omitempty"`
+
+	FirstName string `json:"firstName,omitempty"`
+
+	LastName string `json:"lastName,omitempty"`
+
+	Email string `json:"email,omitempty"`
+
+	Password string `json:"password,omitempty"`
+
+	Phone *string `json:"phone,omitempty"`
+
+	// User Status
+	UserStatus int32 `json:"userStatus,omitempty"`
+
+	// An array 1-deep.
+	DeepSliceModel *[][][]Tag `json:"deepSliceModel"`
+
+	// An array 1-deep.
+	DeepSliceMap [][]AnObject `json:"deepSliceMap,omitempty"`
+}
+
+// AssertUserNullableRequired checks if the required fields are not zero-ed
+func AssertUserNullableRequired(obj UserNullable) error {
+	elements := map[string]interface{}{
+		"deepSliceModel": obj.DeepSliceModel,
+	}
+	for name, el := range elements {
+		if isZero := IsZeroValue(el); isZero {
+			return &RequiredError{Field: name}
+		}
+	}
+
+	if obj.DeepSliceModel != nil {
+		if err := AssertRecurseInterfaceRequired(*obj.DeepSliceModel, AssertTagRequired); err != nil {
+			return err
+		}
+	}
+	if err := AssertRecurseInterfaceRequired(obj.DeepSliceMap, AssertAnObjectRequired); err != nil {
+		return err
+	}
+	return nil
+}
+
+// AssertUserNullableConstraints checks if the values respects the defined constraints
+func AssertUserNullableConstraints(obj UserNullable) error {
+    if obj.DeepSliceModel != nil {
+     	if err := AssertRecurseInterfaceRequired(*obj.DeepSliceModel, AssertTagConstraints); err != nil {
+     		return err
+     	}
+    }
+	if err := AssertRecurseInterfaceRequired(obj.DeepSliceMap, AssertAnObjectConstraints); err != nil {
+		return err
+	}
+	return nil
+}