Newscoop\Entity\PlaylistArticle::setArticle PHP Метод

    public function setArticle(\Newscoop\Entity\Article $article)
    {
        $this->article = $article;
        return $this;
    }

 /**
  * Save playlist with articles
  * @param Newscoop\Entity\Playlist $playlist $playlist
  * @param array $articles
  */
 public function save(Playlist $playlist = null, $articles = null)
 {
     $em = $this->getEntityManager();
     try {
         $em->getConnection()->beginTransaction();
         $em->persist($playlist);
         if (is_null($playlist->getId())) {
             $em->flush();
         }
         $query = $em->createQuery("DELETE FROM Newscoop\\Entity\\PlaylistArticle pa WHERE pa.playlist = ?1");
         $query->setParameter(1, $playlist);
         $query->execute();
         if (!is_null($articles) && is_array($articles)) {
             $ar = $this->getEntityManager()->getRepository('Newscoop\\Entity\\Article');
             foreach ($articles as $articleId) {
                 $article = new PlaylistArticle();
                 $article->setPlaylist($playlist);
                 if (($a = current($ar->findBy(array("number" => $articleId)))) instanceof \Newscoop\Entity\Article) {
                     $article->setArticle($a);
                 }
                 $em->persist($article);
             }
         }
         $em->flush();
         $em->getConnection()->commit();
     } catch (\Exception $e) {
         $em->getConnection()->rollback();
         $em->close();
         return $e;
     }
     return $playlist;
 }