无法在APiPlatform中验证子实体

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class OrderItemType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name')
            ->add('quantity')
            // 添加其他子实体字段
        ;
    }

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

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class OrderType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('customerName')
            ->add('orderItems', CollectionType::class, [
                'entry_type' => OrderItemType::class,
                'allow_add' => true,
                'by_reference' => false,
            ])
            // 添加其他主实体字段
        ;
    }

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

use ApiPlatform\Core\Annotation\ApiResource;
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\Form\FormFactoryInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Validator\Validator\ValidatorInterface;

/**
 * @ApiResource
 */
class Order
{
    // ...

    public function __construct(FormFactoryInterface $formFactory, ValidatorInterface $validator)
    {
        $this->formFactory = $formFactory;
        $this->validator = $validator;
    }

    public function __invoke(Request $request)
    {
        $order = new Order();
        $form = $this->formFactory->create(OrderType::class, $order);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            // 处理验证通过的订单
        }

        // 处理验证失败的情况
        $errors = $this->validator->validate($order);

        // 返回错误信息
        return $errors;
    }
}