symfony 处理请求上传文件为空

Question

我正在尝试在 Symfony 上上传多个文件，但是当提交表单时，表单图像字段返回一个像这样的空对象

object(Doctrine\Common\Collections\ArrayCollection)#1455 (1) {
  ["elements":"Doctrine\Common\Collections\ArrayCollection":private]=>
  array(1) {
    [0]=>
    object(AdminBundle\Entity\ImageNew)#1717 (5) {
      ["nom":"AdminBundle\Entity\ImageNew":private]=>
      NULL
      ["path":"AdminBundle\Entity\ImageNew":private]=>
      NULL
      ["idimage":"AdminBundle\Entity\ImageNew":private]=>
      NULL
      ["categorie":"AdminBundle\Entity\ImageNew":private]=>
      NULL
      ["file":"AdminBundle\Entity\ImageNew":private]=>
      NULL
    }
  }
}

但是当我直接在请求文件里面获取文件时，属性文件存在。我试图通过访问请求中的属性来上传文件，它可以工作，但它仍然想通过 Symfony $form 请求处理程序上传文件。

那是我的控制器

 public function addColorAction(Request $request, Article $article)
    {
        $couleur = new Couleur();
        $form = $this->createForm('AdminBundle\Form\CouleurType', $couleur);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {

            $em = $this->getDoctrine()->getManager();

            $files = $couleur->getImages();

            echo "<pre>";
            var_dump($files); die;
            
            $imgs = $request->files->get("adminbundle_couleur")["images"];

            foreach ($imgs as $img) {
                $image = new ImageNew();
                $image->setFile($img["file"]);
                $image->upload();
                $couleur->addImage($image);

                $em->persist($image);
                $em->flush();
            }

            $color_art_dispo = new CouleurArticleDispo();
            $color_art_dispo->setEnStock(true);
            $color_art_dispo->setArticle($article);
            $color_art_dispo->setCouleur($couleur);
            
            $em->persist($couleur);
            $em->persist($color_art_dispo);
            $em->flush();

            return $this->redirectToRoute('article_index');
        }

        return $this->render(
            'admin/article/couleur/new.html.twig', array(
            'couleur' => $couleur,
            'form' => $form->createView(),)
        );
    }

颜色实体

class Couleur
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="nom", type="string", length=255)
     * @Assert\NotBlank(message="Veuillez entrer le nom de la couleur")
     */
    private $nom;

    /**
     * @var string
     *
     * @ORM\Column(name="code_couleur", type="string", length=6)
     * @Assert\NotBlank(message="Veuillez entrer le code couleur correspondant")
     * @Assert\Length(
     *     min=6,
     *     max=6,
     *     minMessage="Le code couleur n'est pas correct.",
     *     maxMessage="Le code couleur n'est pas correct.",
     * )
     */
    private $codeCouleur;

    /** 
     * 
     * @ORM\OneToMany(targetEntity="CouleurArticleDispo", mappedBy="_couleurs")
     */
    private $colorArticles;

    /**
     * Many Colors have Many Images.
     * 
     * @ORM\ManyToMany(targetEntity="ImageNew",cascade={"remove"})
     * @ORM\JoinTable(name="color_images",joinColumns={@ORM\JoinColumn(name="color_id",referencedColumnName="id", onDelete="CASCADE")},
     *      inverseJoinColumns={@ORM\JoinColumn(name="image_id", referencedColumnName="idimage", onDelete="CASCADE")}
     * )
     */
    private $images;

    public function __toString()
    {
        return (string) $this->getNom();
    }

    /**
     * Class Constructor
     */
    public function __construct() 
    {
        $this->images = new ArrayCollection();
    }
}

这是图片实体

class ImageNew
{
    /**
     * @var string
     *
     * @ORM\Column(name="nom", type="string", length=100)
     */
    private $nom;

    /**
     * @var string
     *
     * @ORM\Column(name="path", type="string", length=255)
     */
    private $path;

    /**
     * @var integer
     *
     * @ORM\Column(name="idimage",type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $idimage;

    /**
     * @var \AdminBundle\Entity\Categorie
     *
     * @ORM\ManyToOne(targetEntity="AdminBundle\Entity\Categorie",cascade={"persist"},inversedBy="slides")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="id_categorie",referencedColumnName="idcategorie",nullable=true,onDelete="SET NULL")
     * })
     */
    private $categorie;

    /**
     * @Assert\NotNull()
     * @Assert\File(
     *     maxSize = "6000k",
     *     mimeTypes = {"image/png", "image/jpg", "image/bmp"},
     *     mimeTypesMessage = "Please upload a valid Image File (PNG, JPEG or BMP)"
     * )
     */
    private $file;

    public function __toString()
    {
        return (string) $this->getPath();
    }
}

这就是couleur类型

class CouleurType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('nom')
            ->add('codeCouleur')
            ->add(
                'images', CollectionType::class, 
                array(
                    'label' => 'Images de l\'article ayant cette couleur',
                    'entry_type' => ImageNewFileType::class,
                    'allow_add' => true,
                    'allow_delete' => true,
                )
            );
    }
}

最后是图片类型

class ImageNewFileType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add(
            'file', FileType::class, 
            [
                'mapped' => false,
                'required' => false,
                'attr' => array(
                    'accept' => 'image/*',
                )
            ]
        );
    }
}

Answer 1

我认为您不应该在 ImageNewFileType 中添加 mapped => false 选项。

https://symfony.com/doc/current/reference/forms/types/form.html#mapped

正如您在文档中看到的那样，写入对象时会忽略该字段。

Answer 2

错误在 ImageNewFileType 内部，因为属性 'mapped' => false，表单没有在 ImageNew 实体的文件字段中设置上传文件信息，所以我已经替换了这个：

class ImageNewFileType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add(
            'file', FileType::class, 
            [
                'mapped' => false,
                'required' => false,
                'attr' => array(
                    'accept' => 'image/*',
                )
            ]
        );
    }
}

通过这个：

class ImageNewFileType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add(
            'file', FileType::class, 
            [
                'mapped' => true(or live this empty because by default it is true),
                'required' => false,
                'attr' => array(
                    'accept' => 'image/*',
                )
            ]
        );
    }
}