Symfony检查在CollectionType的表单验证中，两个字段中是否至少有一个不为空

use Symfony\Component\Form\Extension\Core\Type\CollectionType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Validator\Constraints\NotBlank;
use Symfony\Component\Validator\Constraints\Count;
use Symfony\Component\Form\FormBuilderInterface;

class YourFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('fields', CollectionType::class, [
                'entry_type' => TextType::class,
                'allow_add' => true,
                'allow_delete' => true,
                'constraints' => [
                    new Count(['min' => 1, 'minMessage' => 'At least one field must be filled.']),
                ],
            ])
            ->add('submit', SubmitType::class);
    }
}

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;

class YourController extends AbstractController
{
    /**
     * @Route("/form", name="form_submit", methods={"POST"})
     */
    public function submitForm(Request $request)
    {
        $form = $this->createForm(YourFormType::class);
        $form->handleRequest($request);

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

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

{{ form_start(form) }}
{{ form_row(form.fields) }}
{{ form_end(form) }}