Question

我收到此错误：

消息：“[语义错误]注释属性中的“@Symfony \ Component \ Validator \ Constraints \ Length” User :: $ name不存在，或者无法自动加载。“

这是Github上的代码https://github.com/symfony/Validator

use Symfony\Component\Validator\Validation; 
use Symfony\Component\Validator\Constraints as Assert;

class User {
    /**
     * @Assert\Length(min = 3)
     * @Assert\NotBlank
     */
    private $name;

    /**
     * @Assert\Email
     * @Assert\NotBlank
     */
    private $email;

    public function __construct($name, $email)
    {
        $this->name = $name;
        $this->email = $email;
    }

    /**
     * @Assert\True(message = "The user should have a Google Mail account")
     */
    public function isGmailUser()
    {
        return false !== strpos($this->email, '@gmail.com');
    } 
}

$validator = Validation::createValidatorBuilder()
    ->enableAnnotationMapping()
    ->getValidator();

$user = new User('John Doe', 'john@example.com');

$violations = $validator->validate($user);

如何解决此问题？

Answer 1

Doctrine不使用自动加载PHP，您必须使用autoloadRegistry注册：

AnnotationRegistry::registerAutoloadNamespace("Symfony\Component\Validator\Constraint", "path/to/symfony/library/validator");

Answer 2

将Symfony \ Component \ Validator \ Constraints用作Assert;

    /**
     * @var float $weight
     *
     * @ORM\Column(name="weight", type="decimal",precision=3,scale=2, nullable=true)
     * 
     * @Assert\Range(
     *      min = "90",
     *      max = "350",
     *      minMessage = "You must weight at least 90",
     *      maxMessage = "You cannot weight more than 300"


     * )

     * @Assert\NotBlank(groups={"group one","goup 2"}) 
     * @Assert\Regex(pattern= "/[0-9]/",message="Require number only") 
     */
    private $weight=0;

Answer 3

在Symfony 2.1中添加了长度约束，因此如果您使用的是Symfony 2.0，则无法使用它。

请参阅documentation for the Length constraint。

Answer 4

PHP和Doctrine注释中存在一个错误，有时会被use包含混淆。您必须在类声明中添加PHPDoc注释，此错误将消失。

Answer 5

如果您将symfony / validator作为独立使用，则必须手动注册验证器的命名空间

$loader = require 'vendor/autoload.php';
AnnotationRegistry::registerLoader([$loader, 'loadClass']);

Answer 6

使用作曲家，而不是手动注册验证者的名称空间，您可以做

composer require validator

使用Symfony Validator作为独立时无法读取注释

6 个答案: