Newscoop\GimmeBundle\Controller\TopicsController::getTopicByIdAction PHP Méthode

    public function getTopicByIdAction($id)
    {
        $em = $this->container->get('em');
        $topic = $em->getRepository('Newscoop\\NewscoopBundle\\Entity\\Topic')->getSingleTopicQuery($id)->getOneOrNullResult();
        if (!$topic) {
            throw new NotFoundHttpException('Topic was not found.');
        }
        return $topic;
    }