Symfony2 在控制器中获取 public 服务

Question

Sf2 周围流了很多墨水 controller/container。我面临以下情况：

app/console container:debug security
...
> 4
[container] Information for service security.token_storage
Service Id    security.token_interface
Class         Symfony\Component\Security\Core\Authentication\Token ...
...
Public        yes

LoginBundle\DefaultController.php

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
class DefaultController extends Controller
{
    public function indexAction()
    {
        dump(Controller::get('security.token_storage'));
    ...

显然可以正常工作。

LoginBundle\UserUtilsController

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
class UserUtilsController extends Controller
{
     public function getRoleById()
     {
     dump(Controller::get('security.token_storage'));
     ...

抛出：Error: Call to a member function get() on a non-object

在Sf2 Book - Service container中我发现：

In this example, the controller extends Symfony's base Controller, which gives you access to the service container itself. You can then use the get method to locate and retrieve the my_mailer service from the service container.

误区是： - 两个控制器都扩展了基本控制器，后者本身扩展了 ContainerAware，后者实现了设置容器的 ContainerAwareInterface。 - 两个控制器访问相同的 public 服务容器。

那么，为什么第二个控制器不起作用？

我知道这个问题很老，但我不想将控制器作为服务注入，我认为在 services.yml[=17 中重新声明 public 服务是多余和错误的=]

提前致谢。

Answer 1

我自己找到了答案，我想分享给每个处于相同情况的人... UserUtilsController 不起作用，因为它不是以这种方式工作的。如果您了解 Symfony 架构，它会很有趣。

LoginBundle\Controller\UserUtilsController

// For this job we don't need to extends any class..
class UserUtilsController
{
   // but we need a property for injecting the service in it
   private $token;

   // Now let's inject service into our property $token
   public function __construct($token) 
   {
     $this->token = $token;
   } 

   // It's not done but let pretend it is and let's use it
   public function getRoleById()
   {
     ...
     return $this->token->getToken()->getRoles(); 
     ...

services.yml

   #here it's the magic
   services: 
       # this is a new services container 
       user.loggeduser_utils:
            # this is my class (second class)
            class: LoginBundle\Controller\UserUtilsController
            # this is how I feed my _construct argument
            arguments: ["@security.token_storage"]

所以我只是在我的新 class 中注入一个现有服务。

现在，要使用它，我们必须先调用 class:

LoginBundle\Controller\DefaultController.php

class DefaultController extends Controller
{
  public function indexAction()
  {
     // because my class is now a service container we call in this way
     $userRoleId = $this->get('user.loggeduser_utils');
     ...

在理解了 Sf2 DI 模型之后，上面的这个解决方案几乎是微不足道的。

Symfony2 在控制器中获取 public 服务

Symfony2 get public services in controller

service

dependency-injection

LoginBundle\DefaultController.php

LoginBundle\UserUtilsController

LoginBundle\Controller\UserUtilsController

services.yml

LoginBundle\Controller\DefaultController.php