Symfony 容器在加载我的包时没有扩展

Symfony container has no extensions when loading my bundle

我有一个捆绑包在一段时间内运行良好。但是,我必须向它添加一些自定义配置参数,所以我在包的 config.yml 中写了一些行,如下所示:

# ...
acme_my_bundle:
    special_params: ['param_1', 'param_2']

配置定义在bundle的Configuration class:

namespace ACME\MyBundle\DependencyInjection;

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

/**
 * This is the class that validates and merges configuration from your app/config files
 *
 * To learn more see {@link http://symfony.com/doc/current/cookbook/bundles/extension.html#cookbook-bundles-extension-config-class}
 */
class Configuration implements ConfigurationInterface {
    /**
     * {@inheritdoc}
     */
    public function getConfigTreeBuilder() {
        $treeBuilder = new TreeBuilder();
        $rootNode = $treeBuilder->root('acme_my_bundle');

        $rootNode
            ->children()
                ->arrayNode('special_params')
                ->end()
            ->end();

        return $treeBuilder;
    }
}

捆绑包已在 AppKernel.php 中正确注册:

public function registerBundles() {
    $bundles = array(
        // ...
        new ACME\MyBundle(),
        // ...
    );

    // ...

    return $bundles;
}

但是,当我尝试使用我的应用程序时,出现错误:

There is no extension able to load the configuration for "acme_my_bundle" (in (path_to_bundle)/MyBundle/DependencyInjection/../Resources/config/config.yml). Looked for namespace "acme_my_bundle", found none

我查了一下,但发现的大多数结果都不令人满意 - 我排除了搜索过程中出现的问题:

我尝试调试引发异常的原因,发现当 YAML 文件加载器尝试验证我的配置文件时,容器没有扩展名:

var_dump($container->getExtensions()); // prints empty array - array(0) { }

它会导致验证失败并显示消息的 none 部分 - 没有可用的扩展。

我尝试在 ContainerBuilder::hasExtension() 中调试 $this->extensions 并且出于某种原因,当为供应商捆绑包启动该方法时列表是完整的,但对于我的捆绑包是空的。看来我的包中的某些内容仍未正确定义或注册。

为了不暴露公司代码,我把名字改掉了classes等,如有混淆请见谅。

编辑: 我没有明确提到它,但是 Extension class 被定义并且加载时发生异常 - 就像我在上面写了:

when the YAML file loader tries to validate my config file

为了更清楚,这是我的 Extension class:

namespace ACME\MyBundle\DependencyInjection;

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

/**
 * This is the class that loads and manages your bundle configuration
 *
 * To learn more see {@link http://symfony.com/doc/current/cookbook/bundles/extension.html}
 */
class ACMEMyBundleExtension 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'));
        // The exception is thrown here
        $loader->load('config.yml');
    }
}

您错过了包扩展 class (ACME\MyBundle\DependencyInjection\ACMEMyExtension),如此处 http://symfony.com/doc/current/cookbook/bundles/extension.html. Cookbook entry for bundle configuration is here 所述。 config.yml 中的键值只能命名为 acme_my.

仅创建 Configuration class 是不够的。您需要注册一个依赖注入扩展并在其中使用 Configuration class。

阅读 How to Create Friendly Configuration for a Bundle 食谱中的更多信息:

[The Configuration] class can now be used in your load() method to merge configurations and force validation (e.g. if an additional option was passed, an exception will be thrown)

namespace Acme\MyBundle\DependencyInjection;

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

class AcmeMyBundleExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new Configuration();

        $config = $this->processConfiguration($configuration, $configs);
        // ...
    }
}

根据约定命名您的扩展程序 class 将使其自动加载。更多关于在 Creating an Extension Class. You can also enable the extension manually, see Manually registering an extension class.

中创建 DIC 扩展 classes

检查 reader 在 ACME\MyBundle\DependencyInjection\Configuration 中的 $rootNode = $treeBuilder->root('BUNDLE_CONFIG_KEY'); 配置。

BUNDLE_CONFIG_KEY 应该是:

  • 有效(在 ACME\MyBundle\DependencyInjection\Configuration 和您的 config.yml
  • 中相同
  • 应用程序独有

另外请检查您是否以正确的方式定义了包配置——它应该添加到 app/config/*.yml(全局配置文件之一)。也许您在其他自定义捆绑包配置文件中添加了 acme_my_bundle 配置?