Symfony表单EntityType更新选项取决于搜索

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;

class UserType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name', TextType::class, [
                'label' => 'Search Users',
                'required' => false,
            ])
            ->add('user', EntityType::class, [
                'class' => User::class,
                'choice_label' => 'name',
                'multiple' => false,
                'expanded' => false,
                'query_builder' => function (EntityRepository $er) {
                    return $er->createQueryBuilder('u')
                        ->orderBy('u.name', 'ASC');
                },
            ]);
    }

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

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
$(document).ready(function() {
    $('#user_name').on('input', function() {
        var searchValue = $(this).val();
        $.ajax({
            url: '/path/to/your/ajax/endpoint',
            type: 'GET',
            data: { search: searchValue },
            success: function(data) {
                $('#user_user').empty();
                $.each(data, function(index, item) {
                    $('#user_user').append($('<option>', {
                        value: item.id,
                        text: item.name
                    }));
                });
            }
        });
    });
});
</script>

use Symfony\Component\HttpFoundation\JsonResponse;
use Doctrine\ORM\EntityManagerInterface;

public function ajaxSearchUsers(Request $request, EntityManagerInterface $entityManager)
{
    $searchValue = $request->query->get('search');
    $users = $entityManager->getRepository(User::class)
        ->createQueryBuilder('u')
        ->where('u.name LIKE :search')
        ->setParameter('search', '%' . $searchValue . '%')
        ->getQuery()
        ->getArrayResult();

    return new JsonResponse($users);
}