fix

Author: Maxcastel

src/Metadata/Resource/Factory/ParameterResourceMetadataCollectionFactory.php

@@ -18,7 +18,6 @@
 use ApiPlatform\Metadata\Exception\RuntimeException;
 use ApiPlatform\Metadata\FilterInterface;
 use ApiPlatform\Metadata\JsonSchemaFilterInterface;
-use ApiPlatform\Metadata\Metadata;
 use ApiPlatform\Metadata\OpenApiParameterFilterInterface;
 use ApiPlatform\Metadata\Operation;
 use ApiPlatform\Metadata\Parameter;
@@ -476,7 +475,12 @@ private function createParametersFromAttributes(Operation $operation): Parameter
     {
         $parameters = new Parameters();
 
-        $reflectionClass = new \ReflectionClass($operation->getClass());
+        $resourceClass = $operation->getClass();
+        if (null === $resourceClass) {
+            return $parameters;
+        }
+
+        $reflectionClass = new \ReflectionClass($resourceClass);
 
         foreach ($reflectionClass->getProperties() as $reflectionProperty) {
             foreach ($reflectionProperty->getAttributes(Parameter::class, \ReflectionAttribute::IS_INSTANCEOF) as $attribute) {

tests/Functional/Parameters/ParameterOnPropertiesTest.php

@@ -57,10 +57,6 @@ public function testQueryParameterOnProperty(): void
         $this->assertSame('qoox', $members[1]['name']);
     }
 
-    /**
-     * @throws \Throwable
-     * @throws MongoDBException
-     */
     private function loadFixtures(): void
     {
         $manager = $this->getManager();