如何在Symfony4中从表单中恢复数据？

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

class YourFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('field1')
            ->add('field2')
            // 添加其他字段
        ;
    }

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

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;

class YourController extends AbstractController
{
    /**
     * @Route("/your-route", name="your_route")
     */
    public function yourAction(Request $request)
    {
        $yourEntity = new YourEntity(); // 替换为你的实体类
        $form = $this->createForm(YourFormType::class, $yourEntity);

        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            // 处理表单提交
        }

        return $this->render('your_template.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}

{# your_template.html.twig #}

{{ form_start(form) }}
    {{ form_row(form.field1) }}
    {{ form_row(form.field2) }}
    {# 渲染其他字段 #}
    <button type="submit">提交</button>
{{ form_end(form) }}