我在Symfony 5.1.7和$form->submit（）中挣扎了10个小时;
我的目标是创建一个JSON API，将数据转换为类似的数组。我已经调试并找到了以下部分。
有人能告诉我我做错了什么吗？
为了测试它，我手动创建了一个PHP数组来提交。

我在Controller中的代码

$form = $this->createForm(AddCommentFormType::class);

        $test = [
            'content' => 'Test',
            'media' => [
                [
                    'path' => '1.png',
                ],
                [
                    'path' => '2.png',
                ],
            ],
            '_token' => '3bF4qkiUPjKNuGnbY-ySdO6B2sCLzKcS4ar7auX3Dek',
        ];

        $form->submit($test);

AddCommentFormType

public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('content', TextareaType::class, [
                'constraints' => [
                    new NotBlank(),
                    new Length([
                        'max' => 10000,
                    ]),
                ],
            ])
            ->add('media', CollectionType::class, [
                'entry_type' => MediaFormType::class,
                'constraints' => [
                    new Count([
                        'min' => 1,
                        'max' => 5,
                    ]),
                ],
            ])
            ->add('_token', HiddenType::class, [
                'mapped' => false,
                'constraints' => [
                    new NotBlank(),
                ],
            ])
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'csrf_protection' => false,
        ]);
    }

MediaFormType

public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('path', TextType::class, [
                'constraints' => [
                    new NotBlank(),
                ],
            ])
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => Media::class,
        ]);
    }

Validator Result

children[media].data
This collection should contain 1 element or more.   
[]

children[media]
This form should not contain extra fields.  
[▼
  [▼
    "path" => "1.png"
  ]
  [▼
    "path" => "2.png"
  ]
]