[normalizer] Better handling of schema with just description (any type) (#20461)

* better handling of schema with just description

* update

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

@@ -1935,7 +1935,7 @@ public class ModelUtils {
     private static void logWarnMessagesForIneffectiveValidations(Set<String> setValidations, Schema schema, Set<String> effectiveValidations) {
         setValidations.removeAll(effectiveValidations);
         setValidations.stream().forEach(validation -> {
-            LOGGER.warn("Validation '" + validation + "' has no effect on schema '" + getType(schema) +"'. Ignoring!");
+            LOGGER.warn("Validation '" + validation + "' has no effect on schema '" + getType(schema) + "'. Ignoring!");
         });
     }
 
@@ -2260,11 +2260,14 @@ public class ModelUtils {
             }
 
             // for `type: null`
-            if (schema.getTypes() == null && schema.get$ref() == null) {
+            if (schema.getTypes() == null && schema.get$ref() == null
+                    && schema.getDescription() == null) { // ensure it's not schema with just a description)
                 return true;
             }
         } else { // 3.0.x or 2.x spec
-            if ((schema.getType() == null || schema.getType().equals("null")) && schema.get$ref() == null) {
+            if ((schema.getType() == null || schema.getType().equals("null"))
+                    && schema.get$ref() == null
+                    && schema.getDescription() == null) { // ensure it's not schema with just a description)
                 return true;
             }
         }
@@ -2290,7 +2293,7 @@ public class ModelUtils {
         // dereference the schema
         schema = ModelUtils.getReferencedSchema(openAPI, schema);
 
-        if (schema.getTypes() == null && hasValidation(schema))  {
+        if (schema.getTypes() == null && hasValidation(schema)) {
             // just validation without type
             return true;
         } else if (schema.getIf() != null && schema.getThen() != null) {

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

@@ -497,9 +497,22 @@ public class ModelUtilsTest {
 
         schema = openAPI.getComponents().getSchemas().get("AnyOfTest");
         assertFalse(ModelUtils.isNullTypeSchema(openAPI, schema));
+        // first element (getAnyOf().get(0)) is a string. no need to test
         assertTrue(ModelUtils.isNullTypeSchema(openAPI, (Schema) schema.getAnyOf().get(1)));
         assertTrue(ModelUtils.isNullTypeSchema(openAPI, (Schema) schema.getAnyOf().get(2)));
         assertTrue(ModelUtils.isNullTypeSchema(openAPI, (Schema) schema.getAnyOf().get(3)));
+
+        schema = openAPI.getComponents().getSchemas().get("OneOfRef");
+        assertFalse(ModelUtils.isNullTypeSchema(openAPI, schema));
+        assertFalse(ModelUtils.isNullTypeSchema(openAPI, (Schema) schema.getOneOf().get(0)));
+
+        schema = openAPI.getComponents().getSchemas().get("OneOfMultiRef");
+        assertFalse(ModelUtils.isNullTypeSchema(openAPI, schema));
+        assertFalse(ModelUtils.isNullTypeSchema(openAPI, (Schema) schema.getOneOf().get(0)));
+        assertFalse(ModelUtils.isNullTypeSchema(openAPI, (Schema) schema.getOneOf().get(1)));
+
+        schema = openAPI.getComponents().getSchemas().get("JustDescription");
+        assertFalse(ModelUtils.isNullTypeSchema(openAPI, schema));
     }
 
     @Test

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

@@ -56,9 +56,9 @@ components:
       properties:
         dummy:
           $ref: '#/components/schemas/IntegerRef'
-        number:
+        string_ref:
           anyOf:
-            - $ref: '#/components/schemas/Number'
+            - $ref: '#/components/schemas/StringRef'
     AnyOfStringArrayOfString:
       anyOf:
         - type: string
@@ -85,6 +85,8 @@ components:
         - $ref: '#/components/schemas/IntegerRef'
     IntegerRef:
       type: integer
+    StringRef:
+      type: string
     OneOfAnyType:
       oneOf:
         - type: object
@@ -93,4 +95,13 @@ components:
         - type: string
         - type: integer
         - type: array
-          items: {}
+          items: {}
+    OneOfRef:
+      oneOf:
+        - $ref: '#/components/schemas/IntegerRef'
+    OneOfMultiRef:
+      oneOf:
+        - $ref: '#/components/schemas/IntegerRef'
+        - $ref: '#/components/schemas/StringRef'
+    JustDescription:
+      description: A schema with just description

samples/client/petstore/typescript-axios/builds/composed-schemas/api.ts

@@ -173,7 +173,7 @@ export type PetsFilteredPatchRequestPetTypeEnum = typeof PetsFilteredPatchReques
  * @type PetsPatchRequest
  * @export
  */
-export type PetsPatchRequest = Cat | Dog;
+export type PetsPatchRequest = Cat | Dog | any;
 
 
 /**
@@ -217,11 +217,11 @@ export const DefaultApiAxiosParamCreator = function (configuration?: Configurati
         },
         /**
          * 
-         * @param {PetsFilteredPatchRequest | null} [petsFilteredPatchRequest] 
+         * @param {PetsFilteredPatchRequest} [petsFilteredPatchRequest] 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        petsFilteredPatch: async (petsFilteredPatchRequest?: PetsFilteredPatchRequest | null, options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
+        petsFilteredPatch: async (petsFilteredPatchRequest?: PetsFilteredPatchRequest, options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
             const localVarPath = `/pets-filtered`;
             // use dummy base URL string because the URL constructor only accepts absolute URLs.
             const localVarUrlObj = new URL(localVarPath, DUMMY_BASE_URL);
@@ -250,11 +250,11 @@ export const DefaultApiAxiosParamCreator = function (configuration?: Configurati
         },
         /**
          * 
-         * @param {PetsPatchRequest | null} [petsPatchRequest] 
+         * @param {PetsPatchRequest} [petsPatchRequest] 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        petsPatch: async (petsPatchRequest?: PetsPatchRequest | null, options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
+        petsPatch: async (petsPatchRequest?: PetsPatchRequest, options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
             const localVarPath = `/pets`;
             // use dummy base URL string because the URL constructor only accepts absolute URLs.
             const localVarUrlObj = new URL(localVarPath, DUMMY_BASE_URL);
@@ -305,11 +305,11 @@ export const DefaultApiFp = function(configuration?: Configuration) {
         },
         /**
          * 
-         * @param {PetsFilteredPatchRequest | null} [petsFilteredPatchRequest] 
+         * @param {PetsFilteredPatchRequest} [petsFilteredPatchRequest] 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        async petsFilteredPatch(petsFilteredPatchRequest?: PetsFilteredPatchRequest | null, options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<void>> {
+        async petsFilteredPatch(petsFilteredPatchRequest?: PetsFilteredPatchRequest, options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<void>> {
             const localVarAxiosArgs = await localVarAxiosParamCreator.petsFilteredPatch(petsFilteredPatchRequest, options);
             const localVarOperationServerIndex = configuration?.serverIndex ?? 0;
             const localVarOperationServerBasePath = operationServerMap['DefaultApi.petsFilteredPatch']?.[localVarOperationServerIndex]?.url;
@@ -317,11 +317,11 @@ export const DefaultApiFp = function(configuration?: Configuration) {
         },
         /**
          * 
-         * @param {PetsPatchRequest | null} [petsPatchRequest] 
+         * @param {PetsPatchRequest} [petsPatchRequest] 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        async petsPatch(petsPatchRequest?: PetsPatchRequest | null, options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<void>> {
+        async petsPatch(petsPatchRequest?: PetsPatchRequest, options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<void>> {
             const localVarAxiosArgs = await localVarAxiosParamCreator.petsPatch(petsPatchRequest, options);
             const localVarOperationServerIndex = configuration?.serverIndex ?? 0;
             const localVarOperationServerBasePath = operationServerMap['DefaultApi.petsPatch']?.[localVarOperationServerIndex]?.url;
@@ -348,20 +348,20 @@ export const DefaultApiFactory = function (configuration?: Configuration, basePa
         },
         /**
          * 
-         * @param {PetsFilteredPatchRequest | null} [petsFilteredPatchRequest] 
+         * @param {PetsFilteredPatchRequest} [petsFilteredPatchRequest] 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        petsFilteredPatch(petsFilteredPatchRequest?: PetsFilteredPatchRequest | null, options?: RawAxiosRequestConfig): AxiosPromise<void> {
+        petsFilteredPatch(petsFilteredPatchRequest?: PetsFilteredPatchRequest, options?: RawAxiosRequestConfig): AxiosPromise<void> {
             return localVarFp.petsFilteredPatch(petsFilteredPatchRequest, options).then((request) => request(axios, basePath));
         },
         /**
          * 
-         * @param {PetsPatchRequest | null} [petsPatchRequest] 
+         * @param {PetsPatchRequest} [petsPatchRequest] 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        petsPatch(petsPatchRequest?: PetsPatchRequest | null, options?: RawAxiosRequestConfig): AxiosPromise<void> {
+        petsPatch(petsPatchRequest?: PetsPatchRequest, options?: RawAxiosRequestConfig): AxiosPromise<void> {
             return localVarFp.petsPatch(petsPatchRequest, options).then((request) => request(axios, basePath));
         },
     };
@@ -387,23 +387,23 @@ export class DefaultApi extends BaseAPI {
 
     /**
      * 
-     * @param {PetsFilteredPatchRequest | null} [petsFilteredPatchRequest] 
+     * @param {PetsFilteredPatchRequest} [petsFilteredPatchRequest] 
      * @param {*} [options] Override http request option.
      * @throws {RequiredError}
      * @memberof DefaultApi
      */
-    public petsFilteredPatch(petsFilteredPatchRequest?: PetsFilteredPatchRequest | null, options?: RawAxiosRequestConfig) {
+    public petsFilteredPatch(petsFilteredPatchRequest?: PetsFilteredPatchRequest, options?: RawAxiosRequestConfig) {
         return DefaultApiFp(this.configuration).petsFilteredPatch(petsFilteredPatchRequest, options).then((request) => request(this.axios, this.basePath));
     }
 
     /**
      * 
-     * @param {PetsPatchRequest | null} [petsPatchRequest] 
+     * @param {PetsPatchRequest} [petsPatchRequest] 
      * @param {*} [options] Override http request option.
      * @throws {RequiredError}
      * @memberof DefaultApi
      */
-    public petsPatch(petsPatchRequest?: PetsPatchRequest | null, options?: RawAxiosRequestConfig) {
+    public petsPatch(petsPatchRequest?: PetsPatchRequest, options?: RawAxiosRequestConfig) {
         return DefaultApiFp(this.configuration).petsPatch(petsPatchRequest, options).then((request) => request(this.axios, this.basePath));
     }
 }

samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/PetsPatchRequest.ts

@@ -19,7 +19,7 @@ import { HttpFile } from '../http/http';
  * Type
  * @export
  */
-export type PetsPatchRequest = Cat | Dog;
+export type PetsPatchRequest = Cat | Dog | any;
 
 /**
 * @type PetsPatchRequestClass
@@ -31,3 +31,4 @@ export class PetsPatchRequestClass {
     static readonly mapping: {[index: string]: string} | undefined = undefined;
 }
 
+