Symfony：無法訪問捆綁構造器中的服務

Question

如何訪問捆綁器構造器中的服務？我試圖創建一個系統，其中一個主題包可以自動本身的主題服務註冊，見下文（比較簡單的解決越好）小例子：

<?php 

namespace Organization\Theme\BasicBundle; 

use Symfony\Component\HttpKernel\Bundle\Bundle; 

class ThemeBasicBundle extends Bundle 
{ 
    public function __construct() { 
     $themes = $this->get('organization.themes'); 
     $themes->register(new Organization\Theme\BasicBundle\Entity\Theme(__DIR__)); 
    } 
} 

然而，這 - $>獲取不起作用，這可能是因爲不能保證所有捆綁包都已經被註冊了，是否有任何捆綁註冊「鉤子」可以用來代替？是否有任何特殊的方法名稱可以添加到捆綁類中，並在所有捆綁包實例化後執行？

服務類看起來是這樣的：

<?php 

namespace Organization\Theme\BasicBundle; 

use Organization\Theme\BasicBundle\Entity\Theme; 

class ThemeService 
{ 
    private $themes = array(); 

    public function register(Theme $theme) { 
     $name = $theme->getName(); 

     if (in_array($name, array_keys($this->themes))) { 
      throw new Exception('Unable to register theme, another theme with the same name ('.$name.') is already registered.'); 
     } 

     $this->themes[$name] = $theme; 
    } 

    public function findAll() { 
     return $this->themes; 
    } 

    public function findByName(string $name) { 
     $result = null; 

     foreach($this->themes as $theme) { 
      if ($theme->getName() === $name) { 
       $result = $theme; 
      } 
     } 

     return $result; 
    } 
} 

Answer 1

嘗試，它可以工作:)：

<?php 

namespace Organization\Theme\BasicBundle; 

use Symfony\Component\HttpKernel\Bundle\Bundle; 
use Symfony\Component\DependencyInjection\ContainerBuilder; 

class ThemeBasicBundle extends Bundle 
{ 
    public function build(ContainerBuilder $container) 
    { 
     parent::build($container); 

     $themes = $container->get('organization.themes'); 
     $themes->register(new Organization\Theme\BasicBundle\Entity\Template(__DIR__)); 
    } 
} 

Answer 2

這是正常的，你不能訪問到服務容器，因爲服務不尚未編譯。 要將標記服務注入到該包中，您需要創建一個新的編譯器傳遞。

要創建編譯器通道，需要實現CompilerPassInterface。

將該類放入該包的DependencyInjection/Compiler文件夾中。

use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface; 
use Symfony\Component\DependencyInjection\ContainerBuilder; 

class CustomCompilerPass implements CompilerPassInterface 
{ 
    public function process(ContainerBuilder $container) 
    { 
     if ($container->has('organization.themes')) { 
      $container->getDefinition('organization.themes')->addMethodCall('register', array(new Organization\Theme\BasicBundle\Entity\Theme(__DIR__))); 
     } 
    } 
} 

然後覆蓋您的包定義類的構建方法。

class ThemeBasicBundle extends Bundle 
{ 
    public function build(ContainerBuilder $container) 
    { 
     $container->addCompilerPass(new CustomCompilerPass()); 
    } 
} 

一些鏈接：集裝箱建成後

http://symfony.com/doc/current/components/dependency_injection/compilation.html http://symfony.com/doc/current/cookbook/service_container/compiler_passes.html http://symfony.com/doc/current/components/dependency_injection/tags.html