问如何用Symfony 4上传音乐

EN

namespace App\Form;

use App\Entity\Artist;
use App\Entity\Category;
use App\Entity\Music;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Validator\Constraints\File;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\FileType;

class MusicType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('title')
            ->add('description')
            ->add('picture', FileType::class, [
                'mapped' => false,
                'required' => false,
                'constraints' => [
                    new File([
                        'maxSize' => '8M',
                        'mimeTypes' => [
                            'image/jpeg',
                            'image/png',
                            'image/webp'
                        ]
                    ])
                ],
                'attr' => [
                    'accept'=>'.jpg, .jpeg, .png, .gif'
                ]
            ])
            ->add('music', FileType::class, [
                'mapped' => false,
                'constraints' => [
                    new File([
                        'maxSize' => '256M',
                        'mimeTypes' => [
                            'application/octet-stream',
                            'audio/mpeg',
                            'audio/mp3'
                        ]
                    ])
                ]
            ])