symfony - 未提供给服务的参数

Question

我的验证器服务未提供给验证器。我得到一个错误:“警告:My\Bundle\Validator\Constraints\MyCustomValidator::__construct() 缺少参数 1...”

这是我的services.yml

// My\Bundle\Resources\config\services.yml
services:
    my.validator.service:
        class: My\Bundle\Validator\Constraints\MyCustomValidator
        arguments: [ @doctrine.orm.entity_manager ]

这是我的验证器类:

// My\Bundle\Validator\Constraints\MyCustomValidator
namespace My\Bundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\DependencyInjection\ContainerInterface as Container;
use Doctrine\ORM\EntityManager;

class MyCustomValidator extends ConstraintValidator
{
    private $em;

    public function __construct($em)
    {
        $this->em = $em;
    }

    public function validate($value, Constraint $constraint)
    {
        // Do something
    }
}

这是我的 validation.yml

// My\Bundle\Resources\config\validation.yml
My\Bundle\Entity\Page:
    properties:
        name:
            - NotBlank: ~
            - My\Bundle\Validator\Constraints\MyCustom: ~

这是我的约束类

namespace My\Bundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

class MyCustom extends Constraint
{
    public $message = 'Something is wrong with "%string%".';

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

如果有人能帮助我，我将不胜感激。

我也尝试将参数名称更改为“@doctrine.orm.default_entity_manager”，但没有成功。

Answer 1

问题是我的 services.yml。因为该服务被用作验证器，所以我必须使用 validator.constraint_validator 标签。这在文档中。哎呀!

services:
    my.validator.service:
        class: My\Bundle\Validator\Constraints\MyCustomValidator
        arguments: [ @doctrine.orm.entity_manager ]
        tags:
            - { name: validator.constraint_validator, alias: my_custom_alias}

我还需要覆盖约束类 validatedBy() 方法，以便它返回上面的别名，例如:

// My\Bundle\Validator\Constrains\MyCustom.php
public function validatedBy()
{
    return 'my_custom_alias';
}