Symfony自定义Constrait实体验证

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;

/**
 * @Annotation
 */
class CustomConstraint extends Constraint
{
    public $message = 'The value "{{ value }}" is not valid.';

    public function validatedBy()
    {
        return \get_class($this).'Validator';
    }
}

class CustomConstraintValidator extends ConstraintValidator
{
    public function validate($value, Constraint $constraint)
    {
        if (!$constraint instanceof CustomConstraint) {
            throw new UnexpectedTypeException($constraint, CustomConstraint::class);
        }

        // 在这里编写验证逻辑
        // 如果验证失败，可以使用 $this->context->buildViolation() 方法添加错误消息

        // 示例：验证属性值是否为偶数
        if ($value % 2 !== 0) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ value }}', $value)
                ->addViolation();
        }
    }
}

class MyEntity
{
    /**
     * @CustomConstraint
     */
    private $myProperty;
}