symfony 从实体文件约束中获取 mimeTypes

Question

在我的 API 控制器中，我需要从文件约束（断言）中获取允许的 mimeTypes

use Symfony\Component\Validator\Constraints as Assert;

...

    /**
     * @Assert\File(
     *     maxSize="3M",
     *     mimeTypes={"image/png", "image/jpeg", "image/pjpeg"}
     * )
     * @Vich\UploadableField(mapping="live_thumbnail_image", fileNameProperty="ThumbURI")
     *
     * @var File $Picture
     */
    protected $Picture;

我试过了

$validator = $this->get('validator');
/** @var ClassMetadata $meta */
$meta = $validator->getMetadataFor(ChannelMetadata::class);
$constraints = $meta->getPropertyMetadata('Picture');

然后我有一组 PropertyMetadataInterface 等等。

是否有更简单的方法来获取此信息？

Answer 1

我用它来获取注释值。

    $annotation = $reader->getPropertyAnnotation('Picture', \Symfony\Component\Validator\Constraints\File::class);

$reader是这个服务@annotation_reader

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