Fix the purge cache listener

Author: wtfzdotnet

src/Doctrine/EventListener/PurgeHttpCacheListener.php

@@ -59,7 +59,7 @@ public function preUpdate(PreUpdateEventArgs $eventArgs): void
         $changeSet = $eventArgs->getEntityChangeSet();
         // @phpstan-ignore-next-line
         $objectManager = method_exists($eventArgs, 'getObjectManager') ? $eventArgs->getObjectManager() : $eventArgs->getEntityManager();
-        $associationMappings = $objectManager->getClassMetadata(get_class($eventArgs->getObject())->getAssociationMappings();
+        $associationMappings = $objectManager->getClassMetadata(get_class($eventArgs->getObject()))->getAssociationMappings();
 
         foreach ($changeSet as $key => $value) {
             if (!isset($associationMappings[$key])) {
@@ -126,7 +126,7 @@ private function gatherResourceAndItemTags(object $entity, bool $purgeItem): voi
 
     private function gatherRelationTags(EntityManagerInterface $em, object $entity): void
     {
-        $associationMappings = $em->getClassMetadata($em->getClassMetadata(get_class($entity))->getName())->getAssociationMappings();
+        $associationMappings = $em->getClassMetadata(get_class($entity))->getAssociationMappings();
         /** @var array|AssociationMapping $associationMapping according to the version of doctrine orm */
         foreach ($associationMappings as $property => $associationMapping) {
             if ($associationMapping instanceof AssociationMapping && ($associationMapping->targetEntity ?? null) && !$this->resourceClassResolver->isResourceClass($associationMapping->targetEntity)) {