[Core/Rust Server] Check references in additionalProperties correctly…

… when checking freeForm status (OpenAPITools#19605)

* Check references in additionalProperties correctly

Handle references in additionalProperties correctly when determining free-form status

* Update samples

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

@@ -2424,7 +2424,7 @@ private String getPrimitiveType(Schema schema) {
                 return schema.getFormat();
             }
             return "string";
-        } else if (ModelUtils.isFreeFormObject(schema)) {
+        } else if (ModelUtils.isFreeFormObject(schema, openAPI)) {
             // Note: the value of a free-form object cannot be an arbitrary type. Per OAS specification,
             // it must be a map of string to values.
             return "object";
@@ -2833,7 +2833,7 @@ protected void updateModelForObject(CodegenModel m, Schema schema) {
         if (ModelUtils.isMapSchema(schema)) {
             // an object or anyType composed schema that has additionalProperties set
             addAdditionPropertiesToCodeGenModel(m, schema);
-        } else if (ModelUtils.isFreeFormObject(schema)) {
+        } else if (ModelUtils.isFreeFormObject(schema, openAPI)) {
             // non-composed object type with no properties + additionalProperties
             // additionalProperties must be null, ObjectSchema, or empty Schema
             addAdditionPropertiesToCodeGenModel(m, schema);
@@ -3039,7 +3039,7 @@ public CodegenModel fromModel(String name, Schema schema) {
             m.isNullable = Boolean.TRUE;
         }
 
-        m.setTypeProperties(schema);
+        m.setTypeProperties(schema, openAPI);
         m.setFormat(schema.getFormat());
         m.setComposedSchemas(getComposedSchemas(schema));
         if (ModelUtils.isArraySchema(schema)) {
@@ -3698,7 +3698,7 @@ protected void updatePropertyForMap(CodegenProperty property, Schema p) {
     }
 
     protected void updatePropertyForObject(CodegenProperty property, Schema p) {
-        if (ModelUtils.isFreeFormObject(p)) {
+        if (ModelUtils.isFreeFormObject(p, openAPI)) {
             // non-composed object type with no properties + additionalProperties
             // additionalProperties must be null, ObjectSchema, or empty Schema
             property.isFreeFormObject = true;
@@ -4022,7 +4022,7 @@ public CodegenProperty fromProperty(String name, Schema p, boolean required, boo
             property.datatypeWithEnum = property.dataType;
         }
 
-        property.setTypeProperties(p);
+        property.setTypeProperties(p, openAPI);
         property.setComposedSchemas(getComposedSchemas(p));
         if (ModelUtils.isIntegerSchema(p)) { // integer type
             updatePropertyForInteger(property, p);
@@ -4068,7 +4068,7 @@ public CodegenProperty fromProperty(String name, Schema p, boolean required, boo
                 !ModelUtils.isComposedSchema(p) &&
                 p.getAdditionalProperties() == null && p.getNot() == null && p.getEnum() == null);
 
-        if (!ModelUtils.isArraySchema(p) && !ModelUtils.isMapSchema(p) && !ModelUtils.isFreeFormObject(p) && !isAnyTypeWithNothingElseSet) {
+        if (!ModelUtils.isArraySchema(p) && !ModelUtils.isMapSchema(p) && !ModelUtils.isFreeFormObject(p, openAPI) && !isAnyTypeWithNothingElseSet) {
             /* schemas that are not Array, not ModelUtils.isMapSchema, not isFreeFormObject, not AnyType with nothing else set
              * so primitive schemas int, str, number, referenced schemas, AnyType schemas with properties, enums, or composition
              */
@@ -4865,7 +4865,7 @@ public CodegenResponse fromResponse(String responseCode, ApiResponse response) {
             }
         }
 
-        r.setTypeProperties(responseSchema);
+        r.setTypeProperties(responseSchema, openAPI);
         r.setComposedSchemas(getComposedSchemas(responseSchema));
         if (ModelUtils.isArraySchema(responseSchema)) {
             r.simpleType = false;
@@ -4925,7 +4925,7 @@ public CodegenResponse fromResponse(String responseCode, ApiResponse response) {
                 r.isDouble = Boolean.TRUE;
             }
         } else if (ModelUtils.isTypeObjectSchema(responseSchema)) {
-            if (ModelUtils.isFreeFormObject(responseSchema)) {
+            if (ModelUtils.isFreeFormObject(responseSchema, openAPI)) {
                 r.isFreeFormObject = true;
             } else {
                 r.isModel = true;
@@ -5189,7 +5189,7 @@ public CodegenParameter fromParameter(Parameter parameter, Set<String> imports)
         }
 
         ModelUtils.syncValidationProperties(parameterSchema, codegenParameter);
-        codegenParameter.setTypeProperties(parameterSchema);
+        codegenParameter.setTypeProperties(parameterSchema, openAPI);
         codegenParameter.setComposedSchemas(getComposedSchemas(parameterSchema));
 
         if (Boolean.TRUE.equals(parameterSchema.getNullable())) { // use nullable defined in the spec
@@ -5239,7 +5239,7 @@ public CodegenParameter fromParameter(Parameter parameter, Set<String> imports)
             if (ModelUtils.isMapSchema(parameterSchema)) { // for map parameter
                 updateParameterForMap(codegenParameter, parameterSchema, imports);
             }
-            if (ModelUtils.isFreeFormObject(parameterSchema)) {
+            if (ModelUtils.isFreeFormObject(parameterSchema, openAPI)) {
                 codegenParameter.isFreeFormObject = true;
             }
             addVarsRequiredVarsAdditionalProps(parameterSchema, codegenParameter);
@@ -7115,7 +7115,7 @@ public CodegenParameter fromFormProperty(String name, Schema propertySchema, Set
 
         Schema ps = unaliasSchema(propertySchema);
         ModelUtils.syncValidationProperties(ps, codegenParameter);
-        codegenParameter.setTypeProperties(ps);
+        codegenParameter.setTypeProperties(ps, openAPI);
         codegenParameter.setComposedSchemas(getComposedSchemas(ps));
         if (ps.getPattern() != null) {
             codegenParameter.pattern = toRegularExpression(ps.getPattern());
@@ -7206,7 +7206,7 @@ public CodegenParameter fromFormProperty(String name, Schema propertySchema, Set
                 codegenParameter.isPrimitiveType = false;
                 codegenParameter.items = codegenProperty.items;
                 codegenParameter.mostInnerItems = codegenProperty.mostInnerItems;
-            } else if (ModelUtils.isFreeFormObject(ps)) {
+            } else if (ModelUtils.isFreeFormObject(ps, openAPI)) {
                 codegenParameter.isFreeFormObject = true;
             }
         } else if (ModelUtils.isNullType(ps)) {
@@ -7382,7 +7382,7 @@ protected void updateRequestBodyForMap(CodegenParameter codegenParameter, Schema
         if (StringUtils.isBlank(name)) {
             useModel = false;
         } else {
-            if (ModelUtils.isFreeFormObject(schema)) {
+            if (ModelUtils.isFreeFormObject(schema, openAPI)) {
                 useModel = ModelUtils.shouldGenerateFreeFormObjectModel(name, this);
             } else if (ModelUtils.isMapSchema(schema)) {
                 useModel = ModelUtils.shouldGenerateMapModel(schema);
@@ -7461,7 +7461,7 @@ protected void updateRequestBodyForObject(CodegenParameter codegenParameter, Sch
         if (ModelUtils.isMapSchema(schema)) {
             // Schema with additionalproperties: true (including composed schemas with additionalproperties: true)
             updateRequestBodyForMap(codegenParameter, schema, name, imports, bodyParameterName);
-        } else if (ModelUtils.isFreeFormObject(schema)) {
+        } else if (ModelUtils.isFreeFormObject(schema, openAPI)) {
             // non-composed object type with no properties + additionalProperties
             // additionalProperties must be null, ObjectSchema, or empty Schema
             codegenParameter.isFreeFormObject = true;
@@ -7724,7 +7724,7 @@ public CodegenParameter fromRequestBody(RequestBody body, Set<String> imports, S
         schema = ModelUtils.getReferencedSchema(this.openAPI, schema);
 
         ModelUtils.syncValidationProperties(unaliasedSchema, codegenParameter);
-        codegenParameter.setTypeProperties(unaliasedSchema);
+        codegenParameter.setTypeProperties(unaliasedSchema, openAPI);
         codegenParameter.setComposedSchemas(getComposedSchemas(unaliasedSchema));
         // TODO in the future switch al the below schema usages to unaliasedSchema
         // because it keeps models as refs and will not get their referenced schemas

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

@@ -492,7 +492,7 @@ void generateModels(List<File> files, List<ModelMap> allModels, List<String> unu
                 if (schema.getExtensions() != null && Boolean.TRUE.equals(schema.getExtensions().get("x-internal"))) {
                     LOGGER.info("Model {} not generated since x-internal is set to true", name);
                     continue;
-                } else if (ModelUtils.isFreeFormObject(schema)) { // check to see if it's a free-form object
+                } else if (ModelUtils.isFreeFormObject(schema, openAPI)) { // check to see if it's a free-form object
                     if (!ModelUtils.shouldGenerateFreeFormObjectModel(name, config)) {
                         LOGGER.info("Model {} not generated since it's a free-form object", name);
                         continue;

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

@@ -13,6 +13,7 @@
 import org.openapitools.codegen.meta.features.SchemaSupportFeature;
 import org.openapitools.codegen.utils.ModelUtils;
 
+import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.media.Schema;
 
 public interface IJsonSchemaValidationProperties {
@@ -283,7 +284,7 @@ public interface IJsonSchemaValidationProperties {
      *
      * @param p the schema which contains the type info
      */
-    default void setTypeProperties(Schema p) {
+    default void setTypeProperties(Schema p, OpenAPI openAPI) {
         if (ModelUtils.isModelWithPropertiesOnly(p)) {
             setIsModel(true);
         } else if (ModelUtils.isArraySchema(p)) {
@@ -336,7 +337,7 @@ default void setTypeProperties(Schema p) {
             setIsNull(true);
         } else if (ModelUtils.isAnyType(p)) {
             setIsAnyType(true);
-        } else if (ModelUtils.isFreeFormObject(p)) {
+        } else if (ModelUtils.isFreeFormObject(p, openAPI)) {
             setIsFreeFormObject(true);
             // TODO: remove below later after updating generators to properly use isFreeFormObject
             setIsMap(true);

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

@@ -1117,7 +1117,7 @@ protected void updateModelForObject(CodegenModel m, Schema schema) {
             addAdditionPropertiesToCodeGenModel(m, schema);
         } else {
             m.setIsMap(false);
-            if (ModelUtils.isFreeFormObject(schema)) {
+            if (ModelUtils.isFreeFormObject(schema, openAPI)) {
                 // non-composed object type with no properties + additionalProperties
                 // additionalProperties must be null, ObjectSchema, or empty Schema
                 addAdditionPropertiesToCodeGenModel(m, schema);

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

@@ -1702,7 +1702,7 @@ protected void updateModelForObject(CodegenModel m, Schema schema) {
             addAdditionPropertiesToCodeGenModel(m, schema);
         } else {
             m.setIsMap(false);
-            if (ModelUtils.isFreeFormObject(schema)) {
+            if (ModelUtils.isFreeFormObject(schema, openAPI)) {
                 // non-composed object type with no properties + additionalProperties
                 // additionalProperties must be null, ObjectSchema, or empty Schema
                 addAdditionPropertiesToCodeGenModel(m, schema);

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

@@ -1123,7 +1123,7 @@ protected void updateModelForObject(CodegenModel m, Schema schema) {
             addAdditionPropertiesToCodeGenModel(m, schema);
         } else {
             m.setIsMap(false);
-            if (ModelUtils.isFreeFormObject(schema)) {
+            if (ModelUtils.isFreeFormObject(schema, openAPI)) {
                 // non-composed object type with no properties + additionalProperties
                 // additionalProperties must be null, ObjectSchema, or empty Schema
                 addAdditionPropertiesToCodeGenModel(m, schema);

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

@@ -423,7 +423,7 @@ public String toDefaultValue(Schema p) {
             return "new " + toModelName(ModelUtils.getSimpleRef(p.get$ref())) + "()";
         } else if (ModelUtils.isStringSchema(p)) {
             return "utility::conversions::to_string_t(\"\")";
-        } else if (ModelUtils.isFreeFormObject(p)) {
+        } else if (ModelUtils.isFreeFormObject(p, openAPI)) {
             return "new Object()";
         }
 

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

@@ -134,7 +134,7 @@ public String toDefaultValue(Schema p) {
         if (ModelUtils.isMapSchema(p)) {
             String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
             return "Map[String, " + inner + "]() ";
-        } else if (ModelUtils.isFreeFormObject(p)) {
+        } else if (ModelUtils.isFreeFormObject(p, openAPI)) {
             // We're opinionated in this template to use ujson
             return "ujson.Null";
         }
@@ -143,7 +143,7 @@ public String toDefaultValue(Schema p) {
 
     @Override
     public String getSchemaType(Schema p) {
-        if (ModelUtils.isFreeFormObject(p)) {
+        if (ModelUtils.isFreeFormObject(p, openAPI)) {
             // We're opinionated in this template to use ujson
             return "Value";
         }
@@ -829,7 +829,7 @@ public CodegenProperty fromProperty(String name, Schema schema) {
         CodegenProperty property = super.fromProperty(name, schema);
 
         // Customize type for freeform objects
-        if (ModelUtils.isFreeFormObject(schema)) {
+        if (ModelUtils.isFreeFormObject(schema, openAPI)) {
             property.dataType = "Value";
             property.baseType = "Value";
         }
@@ -839,7 +839,7 @@ public CodegenProperty fromProperty(String name, Schema schema) {
 
     @Override
     public String getTypeDeclaration(Schema schema) {
-        if (ModelUtils.isFreeFormObject(schema)) {
+        if (ModelUtils.isFreeFormObject(schema, openAPI)) {
             return "Value";
         }
         return super.getTypeDeclaration(schema);

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

@@ -844,9 +844,10 @@ public static boolean hasValidation(Schema sc) {
      *         The value can be any type except the 'null' value.
      *
      * @param schema  potentially containing a '$ref'
+     * @param openAPI  document containing the Schema.
      * @return true if it's a free-form object
      */
-    public static boolean isFreeFormObject(Schema schema) {
+    public static boolean isFreeFormObject(Schema schema, OpenAPI openAPI) {
         if (schema == null) {
             // TODO: Is this message necessary? A null schema is not a free-form object, so the result is correct.
             once(LOGGER).error("Schema cannot be null in isFreeFormObject check");
@@ -905,6 +906,8 @@ public static boolean isFreeFormObject(Schema schema) {
                 if (addlProps == null) {
                     return true;
                 } else {
+                    addlProps = getReferencedSchema(openAPI, addlProps);
+
                     if (addlProps instanceof ObjectSchema) {
                         ObjectSchema objSchema = (ObjectSchema) addlProps;
                         // additionalProperties defined as {}

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

@@ -142,7 +142,7 @@ public void testIsModelAllowsEmptyBaseModel() {
         Schema commandSchema = ModelUtils.getSchema(openAPI, "Command");
 
         Assert.assertTrue(ModelUtils.isModel(commandSchema));
-        Assert.assertFalse(ModelUtils.isFreeFormObject(commandSchema));
+        Assert.assertFalse(ModelUtils.isFreeFormObject(commandSchema, openAPI));
     }
 
     @Test
@@ -247,23 +247,23 @@ public void testIsFreeFormObject() {
         OpenAPI openAPI = new OpenAPI().openapi("3.0.0");
         // Create initial "empty" object schema.
         ObjectSchema objSchema = new ObjectSchema();
-        Assert.assertTrue(ModelUtils.isFreeFormObject(objSchema));
+        Assert.assertTrue(ModelUtils.isFreeFormObject(objSchema, openAPI));
 
         // Set additionalProperties to an empty ObjectSchema.
         objSchema.setAdditionalProperties(new ObjectSchema());
-        Assert.assertTrue(ModelUtils.isFreeFormObject(objSchema));
+        Assert.assertTrue(ModelUtils.isFreeFormObject(objSchema, openAPI));
 
         // Add a single property to the schema (no longer a free-form object).
         Map<String, Schema> props = new HashMap<>();
         props.put("prop1", new StringSchema());
         objSchema.setProperties(props);
-        Assert.assertFalse(ModelUtils.isFreeFormObject(objSchema));
+        Assert.assertFalse(ModelUtils.isFreeFormObject(objSchema, openAPI));
 
         // Test a non-object schema
-        Assert.assertFalse(ModelUtils.isFreeFormObject(new StringSchema()));
+        Assert.assertFalse(ModelUtils.isFreeFormObject(new StringSchema(), openAPI));
 
         // Test a null schema
-        Assert.assertFalse(ModelUtils.isFreeFormObject(null));
+        Assert.assertFalse(ModelUtils.isFreeFormObject(null, openAPI));
     }
 
     @Test
@@ -326,9 +326,9 @@ public void test30Schemas() {
         Assert.assertTrue(ModelUtils.isMapSchema((Schema) misc.getProperties().get("map1")));
 
         // test free form object
-        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_1")));
-        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_2")));
-        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_3")));
+        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_1"), openAPI));
+        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_2"), openAPI));
+        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_3"), openAPI));
 
         // test oneOf
         Assert.assertTrue(ModelUtils.isOneOf((Schema) misc.getProperties().get("oneof1")));
@@ -360,9 +360,9 @@ public void test31Schemas() {
         Assert.assertTrue(ModelUtils.isMapSchema((Schema) misc.getProperties().get("map1")));
 
         // test free form object
-        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_1")));
-        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_2")));
-        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_3")));
+        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_1"), openAPI));
+        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_2"), openAPI));
+        Assert.assertTrue(ModelUtils.isFreeFormObject((Schema) misc.getProperties().get("free_form_object_3"), openAPI));
 
         // test oneOf property
         Assert.assertTrue(ModelUtils.isOneOf((Schema) misc.getProperties().get("oneof1")));

modules/openapi-generator/src/test/resources/3_0/rust-server/openapi-v3.yaml

@@ -526,6 +526,11 @@ components:
           $ref: '#/components/schemas/12345AnyOfObject'
       required:
       - requiredAnyOf
+    AdditionalPropertiesReferencedAnyOfObject:
+      description: Check that an object with only additional properties that references another object (e.g. an anyOf object) isn't treated as freeForm
+      type: object
+      additionalProperties:
+        $ref: '#/components/schemas/AnyOfProperty'
     AnyOfObject:
       description: Test a model containing an anyOf
       anyOf:

samples/server/petstore/rust-server/output/openapi-v3/.openapi-generator/FILES

@@ -4,6 +4,7 @@ Cargo.toml
 README.md
 api/openapi.yaml
 bin/cli.rs
+docs/AdditionalPropertiesReferencedAnyOfObject.md
 docs/AdditionalPropertiesWithList.md
 docs/AdditionalPropertiesWithNullable.md
 docs/AnotherXmlArray.md

samples/server/petstore/rust-server/output/openapi-v3/README.md

@@ -182,6 +182,7 @@ Method | HTTP request | Description
 
 ## Documentation For Models
 
+ - [AdditionalPropertiesReferencedAnyOfObject](docs/AdditionalPropertiesReferencedAnyOfObject.md)
  - [AdditionalPropertiesWithList](docs/AdditionalPropertiesWithList.md)
  - [AdditionalPropertiesWithNullable](docs/AdditionalPropertiesWithNullable.md)
  - [AnotherXmlArray](docs/AnotherXmlArray.md)

samples/server/petstore/rust-server/output/openapi-v3/api/openapi.yaml

@@ -536,6 +536,12 @@ components:
           $ref: '#/components/schemas/12345AnyOfObject'
       required:
       - requiredAnyOf
+    AdditionalPropertiesReferencedAnyOfObject:
+      additionalProperties:
+        $ref: '#/components/schemas/AnyOfProperty'
+      description: Check that an object with only additional properties that references
+        another object (e.g. an anyOf object) isn't treated as freeForm
+      type: object
     AnyOfObject:
       anyOf:
       - $ref: '#/components/schemas/AnyOfObject_anyOf'