symfony:另一个表单中的表单获取作者(文章)

symfony: Form inside of another form gets author (article)

对象 Article

 /**
 * @var Collection
 * @ORM\OneToMany(targetEntity="AppBundle\Entity\Photo", mappedBy="article", cascade={"persist"})
 */
private $photos;

对象Photo在其一侧有

/**
 * @var Article
 * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Article", inversedBy="photos")
 */
private $article;

我有一个对象Article的表单,其中包含对象Photo'的表单如下:

//article form building
->add('photos', CollectionType::class, [
            'allow_delete' => true,
            'allow_add' => true,
            'entry_type' => PhotoType::class,
            'entry_options' => [
                'label' => false,
            ]
        ])

在我的 PhotoType 我有

/**
 * {@inheritdoc}
 */
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('image', ImageType::class, [
            'context' => 'photo',
        ])
        ->add('description')
        ->add('url')
...

但是如何在 Photo 表单中设置 article 字段?以便我可以在 table 中使用定义的 article_id 列创建照片?当前,此表单中所有创建的照片都有 article_id NULL,换句话说,它们没有设置

在你的加法器中,你需要设置ID:

public function addPhoto(Photo $photo)
{
    if (!$this->photos->contains($photo)) {
        $this->photos[] = $photo;
        $photo->setDocument($this);
    }

    return $this;
}

并且在您的表单中,您需要设置:'by_reference' => falsehttps://symfony.com/doc/current/reference/forms/types/collection.html#by-reference

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.