Symfony 2.2 Doctrine ResolveTargetEntities 监听器

Question

我正在创建一个包含关系关联的 bundle 。为了保持抽象，我想使用 Doctrine 的全新 ResolveTargetEntities 监听器。

问题是我希望监听器的设置是自动化的，这样 future 使用我的包的开发人员就不需要自己配置监听器了。

在我的包中，有一个名为 data_class 的配置参数，我想用它来设置 ResolveTargetEntities 监听器:

# app/config/config.yml
my_bundle:
    City:
        data_class: Acme\DemoBundle\Entity\City

如何在我的包中设置服务或配置文件以使用此参数配置监听器？像这样:

resolve_target_entities:
    Dev\MyBundle\Model\City: %my_bundle.City.data_class%

编辑:

上面的配置示例是为了展示 Doctrine 应该完成什么，但是这个问题的目的是找到一种方法来自动设置 ResolveTargetEntities 监听器，使用服务，依赖注入(inject)容器，或要求最终用户在 my_bundle 命名空间下仅提供一个参数的任何其他方式:data_class

Answer 1

您可以为此使用 DependancyInjection 文件夹中的 Bundle Extension 类。有一个选项可以将自定义配置添加到另一个捆绑配置 ( http://symfony.com/doc/current/cookbook/bundles/prepend_extension.html )。下面是我执行相同操作的代码。

<?php

namespace Zveen\CmsBundle\DependencyInjection;

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
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 ZveenCmsExtension extends Extension implements PrependExtensionInterface
{
    /**
     * {@inheritDoc}
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);

        $container->setParameter('zveen.cmsbundle.tenant.class', $config['tenant']['class']);
        $container->setParameter('zveen.cmsbundle.tenant.dql', $config['tenant']['class']);

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

    /**
     * Allow an extension to prepend the extension configurations.
     *
     * @param ContainerBuilder $container
     */
    public function prepend(ContainerBuilder $container)
    {
        // get all Bundles
        $bundles = $container->getParameter('kernel.bundles');
        if (isset($bundles['DoctrineBundle'])) {
            // Get configuration of our own bundle
            $configs = $container->getExtensionConfig($this->getAlias());
            $config = $this->processConfiguration(new Configuration(), $configs);

            // Prepare for insertion
            $forInsertion = array(
                'orm' => array(
                    'resolve_target_entities' => array(
                        'Zveen\CmsBundle\Entity\TenantInterface' => $config['tenant']['class']
                    )
                )
            );
            foreach ($container->getExtensions() as $name => $extension) {
                switch ($name) {
                    case 'doctrine':
                        $container->prependExtensionConfig($name, $forInsertion);
                        break;
                }
            }
        }
    }
}