public function load(ObjectManager $manager)
 {
     for ($i = 1; $i <= 5; $i++) {
         $comment1 = new BookComment();
         $comment1->setName('Євгеній');
         $comment1->setComment('Відміна книга');
         $comment1->setBook($this->getReference("book-" . $i));
         $comment2 = new BookComment();
         $comment2->setName('Юлія');
         $comment2->setComment('Усім рекомендую цю кнжику. Авто чітко розкриває усі нюанси');
         $comment2->setBook($this->getReference("book-" . $i));
         $comment3 = new BookComment();
         $comment3->setName('Марія');
         $comment3->setComment('5 з 5');
         $comment3->setBook($this->getReference("book-" . $i));
         $comment4 = new BookComment();
         $comment4->setName('Ірина');
         $comment4->setComment('Краще, що я читала за останній час');
         $comment4->setBook($this->getReference("book-" . $i));
         $manager->persist($comment1);
         $manager->persist($comment2);
         $manager->persist($comment3);
         $manager->persist($comment4);
     }
     $manager->flush();
 }
 /**
  * @Method("POST")
  * @Route("/book-comments/{book}", name="book_comment_create")
  */
 public function createAction(Book $book)
 {
     $comment = new BookComment();
     $comment->setBook($book);
     $form = $this->createForm(new BookCommentType(), $comment);
     $form->submit($this->getRequest());
     if ($form->isValid()) {
         $em = $this->getManager();
         $em->persist($comment);
         $em->flush();
         return $this->redirectToRoute('book_detail', ['id' => $comment->getBook()->getId()]);
     }
     //TODO output errors
 }