symfony2 get field from controller without getting whole entities - symfony

Question

I am having an issue. Am new to symfony2 and I am trying to get a field of a repository in my controller without getting all of it. I tried with the findAll() and it works 'except that am getting all the fields'.
Here is my controller:
<?php
namespace Extranet\RepportsBundle\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
class UtilisateurController extends Controller
{
/**
* Retrieves utilisateurs name(called entite)
*
* #Route("/utilisateur", name="extranet_repports_utilisateur")
* #Template("ExtranetRepportsBundle:Utilisateur:index.html.twig")
*/
public function indexAction()
{
$em = $this->getDoctrine()->getManager();
// $entity = $em->getRepository("ExtranetUtilisateurBundle:Utilisateur")->findAll(array());
$entity = $em->getRepository("ExtranetUtilisateurBundle:Utilisateur")
->createQueryBuilder(
'SELECT u.name FROM ExtranetUtilisateurBundle:Utilisateur u ORDER BY u.name ASC'
)
->getResult();
;
var_dump($entity);die();
return array('entity' => $entity);
}
}
// $em = $this->getDoctrine()->getManager();
// $query = $em->createQuery(
// 'SELECT p
// FROM AcmeStoreBundle:Product p
// WHERE p.price > :price
// ORDER BY p.price ASC'
// )->setParameter('price', '19.99');
// $products = $query->getResult();
I am trying to get only the username from the repository and the commented code below is the example from the symfony book
Thanks for your help

Answer 1

You can specify your properties in select() method of query builder which you want to select
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository("ExtranetUtilisateurBundle:Utilisateur");
$result= $entity->createQueryBuilder('u')
->select('u.name')
->orderBy('u.name')
->getQuery()
->getArrayResult();