如何使用symfony2访问控制器中的语义配置？

Question

我下面的 “如何公开语义配置的软件包” 官方手册为symfony1.2 2.

我有我的configuration.php

namespace w9\UserBundle\DependencyInjection; 

use Symfony\Component\Config\Definition\Builder\TreeBuilder; 
use Symfony\Component\Config\Definition\ConfigurationInterface; 

class Configuration implements ConfigurationInterface 
{ 
    /** 
    * {@inheritDoc} 
    */ 
    public function getConfigTreeBuilder() 
    { 
     $treeBuilder = new TreeBuilder(); 
     $rootNode = $treeBuilder->root('w9_user'); 

     $rootNode 
      ->children() 
       ->scalarNode('logintext')->defaultValue('Zareejstruj się')->end() 
      ->end() 
     ;   

     return $treeBuilder; 
    } 
} 

而且w9UserExtension.php：

namespace w9\UserBundle\DependencyInjection; 

use Symfony\Component\DependencyInjection\ContainerBuilder; 
use Symfony\Component\Config\FileLocator; 
use Symfony\Component\HttpKernel\DependencyInjection\Extension; 
use Symfony\Component\DependencyInjection\Loader; 

class w9UserExtension extends Extension 
{ 
    /** 
    * {@inheritDoc} 
    */ 
    public function load(array $configs, ContainerBuilder $container) 
    { 
     $configuration = new Configuration(); 
     $config = $this->processConfiguration($configuration, $configs); 

     $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config')); 
     $loader->load('services.yml'); 
    } 
} 

这可能听起来很愚蠢，但我无法找到方法，如何访问控制器中的logintext参数？

$logintext = $this->container->getParameter("w9_user.logintext"); 

不起作用。

我在做什么错了？

Answer 1

在w9UserExtension.php后processConfiguration线只需添加

$container->setParameter('w9_user.logintext', $config['logintext']); 

Answer 2

我想乱加所有我的配置值的参数，如@acme，写几十个setParameter线是不够的懒惰。

所以，我做了一个setParameters的方法添加到Extension类。

/** 
* Set all leaf values of the $config array as parameters in the $container. 
* 
* For example, a config such as this for the alias w9_user : 
* 
* w9_user: 
* logintext: "hello" 
* cache: 
*  enabled: true 
* things: 
*  - first 
*  - second 
* 
* would yield the following : 
* 
* getParameter('w9_user.logintext') == "hello" 
* getParameter('w9_user.cache') ---> InvalidArgumentException 
* getParameter('w9_user.cache.enabled') == true 
* getParameter('w9_user.things') == array('first', 'second') 
* 
* It will resolve `%` variables like it normally would. 
* This is simply a convenience method to add the whole array. 
* 
* @param array $config 
* @param ContainerBuilder $container 
* @param string $namespace The parameter prefix, the alias by default. 
*       Don't use this, it's for recursion. 
*/ 
protected function setParameters(array $config, ContainerBuilder $container, 
           $namespace = null) 
{ 
    $namespace = (null === $namespace) ? $this->getAlias() : $namespace; 

    // Is the config array associative or empty ? 
    if (array_keys($config) !== range(0, count($config) - 1)) { 
     foreach ($config as $k => $v) { 
      $current = $namespace . '.' . $k; 
      if (is_array($v)) { 
       // Another array, let's use recursion 
       $this->setParameters($v, $container, $current); 
      } else { 
       // It's a leaf, let's add it. 
       $container->setParameter($current, $v); 
      } 
     } 
    } else { 
     // It is a sequential array, let's consider it as a leaf. 
     $container->setParameter($namespace, $config); 
    } 
} 

，你就可以使用这样的：

class w9UserExtension extends Extension 
{ 
    /** 
    * {@inheritDoc} 
    */ 
    public function load(array $configs, ContainerBuilder $container) 
    { 
     $configuration = new Configuration(); 
     $config = $this->processConfiguration($configuration, $configs); 

     // Add them ALL as container parameters 
     $this->setParameters($config, $container); 

     // ... 
    } 
} 

警告

这可能是不好的做法如果没有广泛的文档和/或需要这样的行为，因为如果您忘记了敏感配置信息，就可能暴露敏感配置信息，并通过暴露无用的配置而失去性能。

此外，它可以防止您在将配置变量添加到容器的参数包中之前广泛地清理配置变量。

如果你使用这个，你应该使用parameters:而不是语义配置，除非你知道你在做什么。

使用需要您自担风险。