无法自动连线服务 [英] Cannot autowire service

问题描述

我正在尝试从FOSUserBundle(Symfony3.4)实现UserManager.

I am trying to implement UserManager from FOSUserBundle (Symfony3.4).

Service/Register.php

Service/Register.php

<?php

namespace AppBundle\Service;

use FOS\UserBundle\Model\UserManager;


class Register
{
    private $userManager;

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

    public function register() {
        $user = $this->userManager->findUserByUsernameOrEmail('[e-mail]');
        if($user){
            return false;
        }
        return true;
    }
}

当我尝试调用此方法时，我得到:

When I try call this method I get:

无法自动装配服务"AppBundle \ Service \ Register":方法"__construct()"的参数"$ userManager"引用类"FOS \ UserBundle \ Model \ UserManager"，但不存在此类服务.您也许应该将此类作为现有"fos_user.user_manager.default"服务的别名.

Cannot autowire service "AppBundle\Service\Register": argument "$userManager" of method "__construct()" references class "FOS\UserBundle\Model\UserManager" but no such service exists. You should maybe alias this class to the existing "fos_user.user_manager.default" service.

我现在该怎么办?

推荐答案

我在使用其他服务时遇到了类似的问题(在Symfony 4中，但原理应适用于3.4)，并设法在Symfony文档页面上找到了答案. 自动定义服务依赖项(自动装配)

I had a similar problem (in Symfony 4, but the principles should apply to 3.4) with a different service and managed to find the answer on the Symfony doc page Defining Services Dependencies Automatically (Autowiring).

以下是该页面的摘录:

配置自动装配的主要方法是创建一个ID与其类完全匹配的服务.在上一个示例中，该服务的ID为AppBundle\Util\Rot13Transformer，这使我们能够自动为该类型自动接线.

The main way to configure autowiring is to create a service whose id exactly matches its class. In the previous example, the service's id is AppBundle\Util\Rot13Transformer, which allows us to autowire this type automatically.

这也可以使用别名来实现.

This can also be accomplished using an alias.

您需要一个别名，因为服务ID与类名不匹配.这样做吧:

You need an alias because the service ID doesn't match the classname. So do this:

# app/config/services.yml
services:
    # ...

    # the `fos_user.user_manager.default` service will be injected when
    # a `FOS\UserBundle\Model\UserManager` type-hint is detected
    FOS\UserBundle\Model\UserManager: '@fos_user.user_manager.default'

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