douya7121 2018-04-12 10:25
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为什么symfony容器有服务重复?

I want to register class App\Service\SomeService as a service.

Here is my services.yaml:

services:
    _defaults:
        autowire: false
        autoconfigure: true
        public: true
    App\:
        resource: '../src/*'
        exclude: '../src/{Entity,Migrations,Tests,Kernel.php}'
    App\Controller\:
        resource: '../src/Controller'
        tags: ['controller.service_arguments']
    someservice:
        class: App\Service\SomeService

Now I run debug:container someservice:

Information for Service "someservice"
=====================================

 ---------------- ------------------------- 
  Option           Value                    
 ---------------- ------------------------- 
  Service ID       someservice              
  Class            App\Service\SomeService  
  Tags             -                        
  Public           yes                      
  Synthetic        no                       
  Lazy             no                       
  Shared           yes                      
  Abstract         no                       
  Autowired        no                       
  Autoconfigured   yes                      
 ---------------- ------------------------- 

But also, when I run debug:container App\\Service\\SomeService:

Information for Service "App\Service\SomeService"
=================================================

 ---------------- ------------------------- 
  Option           Value                    
 ---------------- ------------------------- 
  Service ID       App\Service\SomeService  
  Class            App\Service\SomeService  
  Tags             -                        
  Public           yes                      
  Synthetic        no                       
  Lazy             no                       
  Shared           yes                      
  Abstract         no                       
  Autowired        no                       
  Autoconfigured   yes                      
 ---------------- ------------------------- 

So it turns out I have another service pointing to the same class:

namespace App\Controller;

use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use App\Service\SomeService;

class DefaultController extends Controller
{
    /**
     * @Route("/")
     * @return Response
     */
    public function index()
    {
        var_dump($this->get('someservice') === $this->get(SomeService::class));
        return new Response;
    }
}

Outputs:

bool(false)

Why do I have two services registered instead of one ?

  • 写回答

1条回答 默认 最新

  • doushi1957 2018-04-12 10:30
    关注

    That's because you registered it twice in your services.yaml.

    Once automatically with this line:

    App\:
        resource: '../src/*'
        exclude: '../src/{Entity,Migrations,Tests,Kernel.php}'
    

    The other, manually:

    someservice:
        class: App\Service\SomeService
    

    Since they have different name (someservice and App\Service\SomeService), they're different for Symfony.

    I suggest you to remove the second declaration and to only call the service with its fully qualified name in your controller: $this->get(SomeService::class)

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

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