Symfony2访问服务中的用户和教义

I'm running the equivalent of this code in lots and lots of controller actions, basically it grabs the user's username, and if that username is attached to a blog entity it will allow the user to see the blog entity(s):

我在很多很多控制器动作中运行相当于这段代码，基本上它抓住用户的用户名，如果该用户名附加到博客实体，它将允许用户查看博客实体：

    $em = $this->getDoctrine()->getManager();
    $user = $this->get('security.context')->getToken()->getUser();
    $entities = $em->getRepository('MySiteBundle:Blog')->findBy(array('user' => $user));

    return $this->render('MySiteBundle:Blog:index.html.twig', array(
        'entities' => $entities,

I want to move it into a service so I can cut down on code repetition. I want to avoid doing as much logic in my controllers as possible.

我想把它转移到服务中，这样我就可以减少代码重复。我想避免在控制器中尽可能多地使用逻辑。

That being said, I'm not sure how I can access the user session and doctrine in a service.

话虽这么说，我不确定如何在服务中访问用户会话和学说。

Here's my services.yml:

这是我的services.yml：

mysite.user.blog:
    class: MySite\SiteBundle\Services\BlogUser

And here's how I was attempting to call it in the controller:

以下是我试图在控制器中调用它的方式：

public function testAction() {
    $response = $this->get('mysite.user.blog');
    return new Response($response);
}

I did try using an event subscriber/listener tag, but that doesn't seem to accomplish the task I want.

我确实尝试使用事件订阅者/侦听器标记，但这似乎没有完成我想要的任务。

Here is my completely horrible attempt at a service. I couldn't get any response from it without using a constructor.

这是我完全可怕的服务尝试。没有使用构造函数我无法得到任何响应。

namespace MySite\SiteBundle\Services;

use MySite\SiteBundle\Entity\Blog;

class BlogUser {

    protected $entities;

    public function __construct(){
        $em = $this->getDoctrine()->getManager();
        $user = $this->get('security.context')->getToken()->getUser();
        $this->entities = $em->getRepository('MySiteBundle:Blog')->findBy(array('user' => $user));
    }
}

Am I going about this the completely wrong way? Is there a better way that I'm missing?

我是以完全错误的方式来做这件事的吗？有没有更好的方法让我失踪？

EDIT/ANSWER:

modified my naming convention a little:

修改了我的命名约定：

//services.yml
mysite.user.blog.entities:
    class: Mysite\SiteBundle\Services\BlogUser
    arguments: ["@doctrine.orm.entity_manager", "@security.context"]

In the controller action:

在控制器动作中：

$userEntities = $this->get('mysite.user.blog.entities');
$entities = $userEntities->getEntities();

In the service itself:

在服务本身：

class BlogUser {

    protected $entities;

    public function __construct($em, $securityContext){
        $user = $securityContext->getToken()->getUser();
        $this->entities = $em->getRepository('MySiteBundle:Blog')->findBy(array('user' => $user));
    }
    public function getEntities(){
        return $this->entities;
    }
}

Still needs two lines to get the $entities variable in the controller, but this is way better than defining the same thing over and over.

仍然需要两行来获取控制器中的$ entities变量，但这比一遍又一遍地定义相同的东西要好。

3 个解决方案

#1

"Security.context" has been deprecated since Symfony 2.6

自Symfony 2.6以来，“Security.context”已被弃用

After some community discussions, it was decided that SecurityContext gives too many dependencies to retrieve a simple Token/User object. That's why, starting with Symfony 2.6, thesecurity.context service has been deprecated and split into two new services:security.authorization_checker and security.token_storage.

在一些社区讨论之后，确定SecurityContext提供了太多依赖项来检索简单的令牌/用户对象。这就是为什么，从Symfony 2.6开始，不推荐使用thiscurity.context服务并将其拆分为两个新服务：security.authorization_checker和security.token_storage。

Source

资源

Thus, the new way to do it would be, first configure your service as:

因此，新的方法是，首先将您的服务配置为：

mysite.user.blog:
    class: MySite\SiteBundle\Services\BlogUser
    arguments: ["@doctrine.orm.entity_manager", "@security.token_storage"]

Then in the service class constructor:

然后在服务类构造函数中：

class BlogUser
{
    protected $user;
    protected $entities;

    public function __construct(EntityManager $em, TokenStorage $tokenStorage)
    {
        $this->user = $tokenStorage->getToken()->getUser();
        $this->entities = $em->getRepository('MySiteBundle:Blog')->findBy(array('user' => $user));
    }
}

#2

Yes, you are doing it in wrong way. Let's look at your code:

是的，你是以错误的方式做到的。我们来看看你的代码：

    # call to undefined object method getDoctrine()
    $em = $this->getDoctrine()->getManager();
    # call to undefined object method get()
    $user = $this->get('security.context')->getToken()->getUser();

You cannot call getting entitymanager and security.context in your service in the same way like in your controller. Instead, you have to inject entitymanager and security.context services. Example:

您不能像控制器一样调用服务中的entitymanager和security.context。相反，您必须注入entitymanager和security.context服务。例：

# services.yml
mysite.user.blog:
    class: MySite\SiteBundle\Services\BlogUser
    calls:
        - [ setUserFromSecurityContext, [ @security.context ]]
        - [ setEntityManager, [ @doctrine.orm.entity_manager ]]

And improved service:

并改善服务：

namespace Catablog\SiteBundle\Services;

use MySite\SiteBundle\Entity\Blog;

class BlogUser {
    private $entityManager;
    private $user;

    public function setEntityManager(EntityManager $entityManager)
    {
        $this->entityManager = $entityManager;
    }

    public function setUserFromSecurityContext(SecurityContext $securityContext)
    {
        # notice, there are a cases when `getToken()` returns null, so improve this
        $this->user = $securityContext->getToken()->getUser();
    }
    public function getEntities(){
        # your code here
    }
}

More info about Dependency injection

有关更多信息Dependency injection

#3

You are looking on how to 'inject' other services into your custom service. Take a look at Service Container documentation.

您正在研究如何将“其他服务”注入您的自定义服务。查看Service Container文档。

In your case, you can inject doctrine.orm.entity_manager and security.context services into your BlogUser class via constructor injection. For example:

在您的情况下，您可以通过构造函数注入将doctrine.orm.entity_manager和security.context服务注入您的BlogUser类。例如：

class BlogUser {

    public function __construct($em, $securityContext) {
        $user = $securityContext->getToken()->getUser();
        $this->entities = $em->getRepository('MySiteBundle:Blog')->findBy(array('user' => $user));
    }

}

And configure your service as the following:

并按以下方式配置您的服务：

mysite.user.blog:
    class: MySite\SiteBundle\Services\BlogUser
    arguments:    ["@doctrine.orm.entity_manager", "@security.context"]