Fix repositories to fetch entity linked to stored object

getSingleResult() replaced by getOneOrNullResult() to\ avoid error being thrown.
Fix naming of properties.

src/Bundle/ChillEventBundle/Repository/EventRepository.php

@@ -38,21 +38,16 @@ class EventRepository implements ObjectRepository, AssociatedEntityToStoredObjec
         return $this->repository->createQueryBuilder($alias, $indexBy);
     }
 
-    /**
-     * @throws NonUniqueResultException
-     * @throws NoResultException
-     */
     public function findAssociatedEntityToStoredObject(StoredObject $storedObject): ?object
     {
         $qb = $this->createQueryBuilder('e');
         $query = $qb
             ->join('e.documents', 'ed')
-            ->join('ed.storedObject', 'so')
-            ->where('so.id = :storedObjectId')
+            ->where('ed.id = :storedObjectId')
             ->setParameter('storedObjectId', $storedObject->getId())
             ->getQuery();
 
-        return $query->getSingleResult();
+        return $query->getOneOrNullResult();
     }
 
     public function find($id)