Php Symfony2。没有能够加载配置的扩展。自定义配置块

我将在symfony 2开始我的第一个项目。我使用Symfony 2.6.6

我的AppKernel.php

<?php

use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Config\Loader\LoaderInterface;

class AppKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = array(
            new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
            new Symfony\Bundle\SecurityBundle\SecurityBundle(),
            new Symfony\Bundle\TwigBundle\TwigBundle(),
            new Symfony\Bundle\MonologBundle\MonologBundle(),
            new Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle(),
            new Symfony\Bundle\AsseticBundle\AsseticBundle(),
            new Doctrine\Bundle\DoctrineBundle\DoctrineBundle(),
            new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
            new FOS\UserBundle\FOSUserBundle(),
            new AppBundle\AppBundle(),
        );

        if (in_array($this->getEnvironment(), array('dev', 'test'))) {
            $bundles[] = new Symfony\Bundle\DebugBundle\DebugBundle();
            $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
            $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
            $bundles[] = new Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle();
            $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
        }

        return $bundles;
    }

    public function registerContainerConfiguration(LoaderInterface $loader)
    {
        $loader->load($this->getRootDir().'/config/config_'.$this->getEnvironment().'.yml');
    }
}

我不明白为什么我在调用应用程序/控制台时会收到此消息

  [Symfony\Component\Config\Exception\FileLoaderLoadException]    There is no extension able to load the configuration for "karmed" (in /home/vstas/data/work/karmed/app/config/config.yml). Looked for namespace "karmed", found "framework", "security", "twig", "monolog", "swiftmailer", "assetic", "doctrine", "sensio_framework_extra", "fos_user", "app", "debug", "web_profiler", "sensio_distribution" in /home/vstas/data/work/karmed/app/config/config.yml (which is being imported from "/home/vstas/data/work/karmed/app/config/config_dev.yml").  

我尝试从目录app/cache中删除所有文件

我认为问题在于配置加载顺序，因为当我尝试将AppExtension更改为

.....
class AppExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        print "exit";
        exit();
        $configuration = new Configuration();
.....

没有什么变化。

---

但是当我从config.yml中删除我的部分变量时，我可以看到我的调试消息

配置使用的不是rootnode名称，而是扩展的DI别名。因为它是AppExtension，所以它的别名是

app

。改为使用

app:

进行配置

---

但是，AppBundle的不可重用。它不应该使用自定义配置。只需直接使用常量（最佳做法）或服务参数（推荐做法）。

非常感谢。我想了想，但没有时间检查。我知道最佳实践，在我的项目中，我不会使用“语义配置”。这只是为了教育。：）谢谢大家!@vstas78如果此答案解决了您的问题，请

karmed:
  var: off

  [Symfony\Component\Config\Exception\FileLoaderLoadException]    There is no extension able to load the configuration for "karmed" (in /home/vstas/data/work/karmed/app/config/config.yml). Looked for namespace "karmed", found "framework", "security", "twig", "monolog", "swiftmailer", "assetic", "doctrine", "sensio_framework_extra", "fos_user", "app", "debug", "web_profiler", "sensio_distribution" in /home/vstas/data/work/karmed/app/config/config.yml (which is being imported from "/home/vstas/data/work/karmed/app/config/config_dev.yml").  

.....
class AppExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        print "exit";
        exit();
        $configuration = new Configuration();
.....