Symfony2 y Slugify en las entidades (Famoso manual Jobbet)

[Luvelnet]

Gracias por responder!

La funcion Index es la siguiente:

public function indexAction()
{
$em = $this->getDoctrine()->getEntityManager();

$qy = $em->createQuery('SELECT n.id,
n.title,
n.titleslug,
n.notice,
n.url,
n.createdAt,
c.category,
u.login
FROM HomeBundle:Categories c,
HomeBundle:Notices n,
HomeBundle:Users u,
HomeBundle:UserPublish up
WHERE up.notices = n.id
AND up.categories = c.id
AND up.users = u.id');

$entities = $qy->getResult();

//Esto si funciona
//$entities = $em->getRepository('HomeBundle:Notices')->findAll();

return $this->render('HomeBundle:Notices:index.html.twig', array(
'entities' => $entities
));
}

Estará mal el DQL o me falta algo en la entidad?