使用 Doctrine 和 Symfony 持久化 PHP 8.1 枚举类型

namespace App\Entity;

use App\Enum\GradeEnum;
use Doctrine\ORM\Mapping as ORM;

#[ORM\Entity]
class User
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column]
    private ?int $id = null;

    #[ORM\Column(type: 'string', enumType: GradeEnum::class)]
    private ?GradeEnum $grade = null;

    // ... 其他属性和方法

    public function getGrade(): ?GradeEnum
    {
        return $this->grade;
    }

    public function setGrade(?GradeEnum $grade): self
    {
        $this->grade = $grade;

        return $this;
    }
}

namespace App\Form;

use App\Enum\GradeEnum;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;

class ProfileType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options): void
    {
        $builder
            ->add('grade', ChoiceType::class, [
                'choices' => GradeEnum::cases(),
                'choice_label' => function (GradeEnum $grade) {
                    return $grade->name; // 或者 $grade->value，根据需求显示标签
                },
                'choice_value' => function (?GradeEnum $grade) {
                    return $grade?->name; // 返回枚举名称作为提交值
                },
                'placeholder' => '请选择一个选项',
                'required' => false,
                'attr' => [
                    'class' => 'mb-3'
                ],
                'label' => '等级'
            ]);
    }

    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            // 在此配置其他表单选项
        ]);
    }
}

namespace App\Controller;

use App\Entity\User;
use App\Form\ProfileType;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

class ProfileController extends AbstractController
{
    #[Route('/profile', name: 'app_profile')]
    public function index(Request $request): Response
    {
        $user = new User(); // 或从数据库加载已有用户
        $form = $this->createForm(ProfileType::class, $user);

        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $entityManager = $this->getDoctrine()->getManager();
            $entityManager->persist($user);
            $entityManager->flush();

            return $this->redirectToRoute('app_profile');
        }

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