Symfony One To Many Does Not Bind Parents

Question

I have a Quiz structure with three entities:

• Quiz has questions (OneToMany)
• Question has Quiz (ManyToOne)
• Question has answers (OneToMany)
• The answer has a question (ManyToOne)

The code looks like this:

Quiz entity

class Quiz { /** * @ORM\OneToMany(targetEntity="Question", mappedBy="quiz", cascade={"persist", "remove"}) */ private $questions; public function __construct() { $this->questions = new ArrayCollection(); } public function addQuestion(\Cariboo\QuizBundle\Entity\Question $questions) { $questions->setQuiz( $this ); // die(); Not dying here... $this->questions[] = $questions; return $this; } public function removeQuestion(\Cariboo\QuizBundle\Entity\Question $questions) { $this->questions->removeElement($questions); } public function getQuestions() { return $this->questions; } } 

Question Object

 class Question { /** * @ORM\OneToMany(targetEntity="Answer", mappedBy="question", cascade={"persist", "remove"}) */ private $answers; /** * @ORM\ManyToOne(targetEntity="Cariboo\QuizBundle\Entity\Quiz", cascade={"persist"}) */ private $quiz; public function addAnswer(\Cariboo\QuizBundle\Entity\Answer $answers) { $answers->setQuestion( $this ); $this->answers[] = $answers; return $this; } public function removeAnswer(\Cariboo\QuizBundle\Entity\Answer $answers) { $this->answers->removeElement($answers); } public function getAnswers() { return $this->answers; } public function setQuiz(\Cariboo\QuizBundle\Entity\Quiz $quiz = null) { $this->quiz = $quiz; return $this; } public function getQuiz() { return $this->quiz; } } 

Response object

 class Answer { /** * @ORM\ManyToOne(targetEntity="Cariboo\QuizBundle\Entity\Question") */ private $question; public function setQuestion(\Cariboo\QuizBundle\Entity\Question $question = null) { $this->question = $question; return $this; } public function getQuestion() { return $this->question; } } 

I cascade save them.

I configured my setters as described in Cascaded persist not working (Doctrine ORM + Symfony 2)

The addAnswer request is executed and the responses to it are set correctly. However addQuestion does not set the quiz.

image of what is reset when the form is submitted

I can add foreach to my controller, but I am not satisfied with this, since I feel that I am not using the power of symfony. (No duplicate object matches correctly )

  if ( $form->isValid() ) { foreach ( $quiz->getQuestions() as $question ) { $question->setQuiz( $quiz ); } $em = $this->getDoctrine()->getManager(); $em->persist( $quiz ); $em->flush(); return $this->redirect( $this->generateUrl( 'quiz_show', array( 'slug' => $quiz->getSlug() ) ) ); } 

I cannot understand why addQuestion not running.

Edit

My Quiz Form

  $builder ->add( 'questions', 'collection', array( 'type' => new QuestionType(), 'allow_add' => true, 'allow_delete' => true, 'prototype' => true, 'prototype_name' => '__qst_prot__' ) ) ; 

Partial Builder Question

  $builder ->add( 'question', 'text' ) ->add( 'answers', 'collection', array( 'type' => new AnswerType(), 'allow_add' => true, 'allow_delete' => true, 'prototype' => true, 'prototype_name' => '__asw_prot__' ) ); 

My Answer form

 $builder ->add( 'answer', 'text' ) ->add( 'correct' ) ; 

Answer 1

The problem is the type of the collection form. You need to set by_reference to false if you want to call the installer of the parent objects.

Symfony docs:

Similarly, if you're using the CollectionType field where your underlying collection data is an object (like with Doctrine ArrayCollection), then by_reference must be set to false if you need the adder and remover (eg addAuthor() and removeAuthor()) to be called.

More details here: http://symfony.com/doc/current/reference/forms/types/collection.html#by-reference