fix(hydra): move owl:maxCardinality from JsonSchema to Hydra (#6136)

features/openapi/docs.feature

@@ -98,7 +98,6 @@ Feature: Documentation support
     And the "playMode" property for the OpenAPI class "VideoGame" should be equal to:
     """
     {
-      "owl:maxCardinality": 1,
       "type": "string",
       "format": "iri-reference",
       "example": "https://example.com/"
@@ -310,7 +309,6 @@ Feature: Documentation support
     And the "resourceRelated" property for the OpenAPI class "Resource" should be equal to:
     """
     {
-      "owl:maxCardinality": 1,
       "readOnly": true,
       "anyOf": [
         {
@@ -389,7 +387,6 @@ Feature: Documentation support
     And the "data" property for the OpenAPI class "WrappedResponseEntity.CustomOutputEntityWrapperDto-read" should be equal to:
     """
     {
-      "owl:maxCardinality": 1,
       "$ref": "#\/components\/schemas\/WrappedResponseEntity-read"
     }
     """

src/Hydra/Serializer/DocumentationNormalizer.php

@@ -386,6 +386,23 @@ private function getRange(ApiProperty $propertyMetadata): array|string|null
         return 1 === \count($types) ? $types[0] : $types;
     }
 
+    private function isSingleRelation(ApiProperty $propertyMetadata): bool
+    {
+        $builtInTypes = $propertyMetadata->getBuiltinTypes() ?? [];
+
+        foreach ($builtInTypes as $type) {
+            $className = $type->getClassName();
+            if (!$type->isCollection()
+                && null !== $className
+                && $this->resourceClassResolver->isResourceClass($className)
+            ) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Builds the classes array.
      */
@@ -509,6 +526,10 @@ private function getProperty(ApiProperty $propertyMetadata, string $propertyName
             $property['owl:deprecated'] = true;
         }
 
+        if ($this->isSingleRelation($propertyMetadata)) {
+            $property['owl:maxCardinality'] = true;
+        }
+
         return $property;
     }
 

src/JsonSchema/Metadata/Property/Factory/SchemaPropertyMetadataFactory.php

@@ -125,14 +125,6 @@ public function create(string $resourceClass, string $property, array $options =
                 $className = $valueType->getClassName();
             }
 
-            if (!\array_key_exists('owl:maxCardinality', $propertySchema)
-                && !$isCollection
-                && null !== $className
-                && $this->resourceClassResolver->isResourceClass($className)
-            ) {
-                $propertySchema['owl:maxCardinality'] = 1;
-            }
-
             if ($isCollection && null !== $propertyMetadata->getUriTemplate()) {
                 $keyType = null;
                 $isCollection = false;

src/OpenApi/Serializer/LegacyOpenApiNormalizer.php

@@ -45,7 +45,6 @@ public function normalize(mixed $object, string $format = null, array $context =
                     }
                     unset($schemas[$name]['properties'][$property]['type']);
                 }
-                unset($schemas[$name]['properties'][$property]['owl:maxCardinality']);
             }
         }
 

tests/JsonSchema/Command/JsonSchemaGenerateCommandTest.php

@@ -120,7 +120,6 @@ public function testArraySchemaWithReference(): void
         ]);
 
         $this->assertEquals($json['definitions']['BagOfTests.jsonld-write']['properties']['type'], [
-            'owl:maxCardinality' => 1,
             '$ref' => '#/definitions/TestEntity.jsonld-write',
         ]);
     }