Ojs\OAIBundle\Controller\JournalController::listIdentifierAction PHP Метод

    public function listIdentifierAction(Request $request)
    {
        /** @var EntityManager $em */
        $em = $this->getDoctrine()->getManager();
        $slug = $request->get('slug', false);
        $this->throw404IfNotFound($slug);
        $builder = $em->createQueryBuilder();
        $builder->select('article')->from('OjsJournalBundle:Article', 'article');
        $builder->join('article.journal', 'journal', 'WITH');
        $builder->where($builder->expr()->eq('journal.slug', ':slug'))->setParameter('slug', $slug);
        $data = ['records' => $builder->getQuery()->getResult()];
        return $this->response('OjsOAIBundle:Journal:identifiers.xml.twig', $data);
    }