Symfony2: Querying for object with 2 other objects as parameters - database

Question

What is the best way to do the following: I have a gameobject entity which has properties game and user. Now my method gets the game id and the user id and i want to look for the gameobject with game = object of game id and user = object of user id.
I have tried the following:
$game = $this->getDoctrine()->getRepository("xxx:Game")->find($game_id);
$user = $this->getDoctrine()->getRepository("xxx:User")->find($user_id);
$gameobject_query = $em->getRepository('xxx:Gameobject')->createQueryBuilder('g')
->where('g.game = :game AND g.user = :user')
->setParameters(array(
'game' => $game,
'user' => $user
))
->getQuery();
$gameobject = $gameobject_query->getResult();
Your advices would be appriciated :)

Answer 1

I think that something like the following should work:
$repository = this->getDoctrine()->getRepository('xxx:GameObject');
$queryBuilder = $repository->createQueryBuilder('go')
->innerJoin('go.game', 'g')
->innerJoin('go.user', 'u')
->where('g.id = :gameId')
->andWhere('u.id = :userId')
->setParameter('gameId', $gameId)
->setParameter('userId', $userId);
$gameObjects = $queryBuilder->getQuery()
->execute();
Alternatively, the following may also work and be more efficient: It should do the same but without needing to join to the other entities:
$repository = this->getDoctrine()->getRepository('xxx:GameObject');
$queryBuilder = $repository->createQueryBuilder('go')
->where('IDENTIY(go.game) = :gameId')
->andWhere('IDENTITY(go.user) = :userId')
->setParameter('gameId', $gameId)
->setParameter('userId', $userId);
$gameObjects = $queryBuilder->getQuery()
->execute();

Answer 2

Why didn't you use the findOneBy method of your Gameobject repo ?
$game = $this->getDoctrine()->getRepository("xxx:Game")->find($game_id);
$user = $this->getDoctrine()->getRepository("xxx:User")->find($user_id);
$gameobject = $em->getRepository('xxx:Gameobject')->findOneBy(array(
'game' => $game,
'user' => $user
));