How to validate the number of files?

Question

symfony

* @var File|UploadedFile
     *
     * @Assert\NotNull()
     * @Assert\NotBlank()
     * @Assert\Image(
     *      detectCorrupted=true,
     *      mimeTypes={"image/png", "image/jpg", "image/jpeg"},
     * )
     * @Assert\File(
     *     maxSize="8M",
     * )
     */
    public $imageFile;

    /**
     * self constructor.
     *
     * @param UploadedFile $imageFile
     */
    public function __construct(UploadedFile $imageFile)
    {
        $this->imageFile = $imageFile;
    }

However, if nothing comes, then this DTO is valid, and then it gives an error in the code after validation

$filesMeta = \json_decode($request->request->get('ашдуы')); 
       foreach ($filesMeta as $imageMetaData) {
...
Warning: Invalid argument supplied for foreach()

Answer 1

This won't help?
https://symfony.com/doc/current/reference/constrai...