Question

我有一个包含3个实体的测验结构：

测验有问题（OneToMany）
问题有测验（ManyToOne）
问题有答案（OneToMany）
答案有问题（ManyToOne）

代码如下：

测验实体

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;
    }
}

问题实体

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;
    }
}

回答实体

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;
    }
}

我级联坚持他们。

我按照Cascaded persist not working (Doctrine ORM + Symfony 2)

中的说明配置了我的二传手

执行addAnswer并获得答案，问题设置正确。但是，addQuestion没有设置测验。

image of what gets dumped upon sending the form

我可以在我的控制器中添加foreach，但我对此并不满意，因为我觉得我没有利用symfony的力量。（没有Entity doesn't associate correctly的重复）

    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()
        ) ) );
    }

我无法弄清楚为什么addQuestion没有被执行。

修改

我的Quiz表格

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

Question

的部分构建器

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

我的Answer form

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

Answer 1

问题出在collection表单类型中。如果要调用父实体设置器，则需要将by_reference设置为false。

Symfony docs：

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

在此处阅读更多内容：http://symfony.com/doc/current/reference/forms/types/collection.html#by-reference

Symfony One To Many不连接父母

修改

1 个答案: