Symfony validation on multiple file upload
Since you're validating array of File, you need to apply All validator, which will apply inner validators on each element of the array.
Try with something like:
/** * @Assert\All({ * @Assert\NotBlank() * @Assert\File(mimeTypes = {"application/pdf", "application/x-pdf", "image/jpeg", "image/png"}) * }) * @ORM\Column(type="array") */ private $myFile;