Symfony 从另一个控制器服务访问控制器服务引发异常

我在bundle services.xml文件中设置了3个简单控制器，如下所示：

http://symfony.com/schema/dic/services/services-1.0.xsd“>

}

我得到一个奇怪的错误：

FatalErrorException:错误：在/Users/bard/Projects/LavelAPI/src/Wsh/LapiBundle/Controller/UserController.php第82行中找不到类'Symfony\Component\Debug\Exception\ContextErrorException'

我不知道该怎么办，第82行是UserController的结尾，看起来如下：

类UserController扩展控制器
{
受保护的集装箱

function __construct(Container $container)
{
    $this->container = $container;
}

public function postAlert($appIdToken, $securityToken, $searchParams)
{
    // first let see if user not allready registered
    $em = $this->getDoctrine()->getManager();
    //$user = $this->container->get('wsh_lapi.users')->getUser($appIdToken, $securityToken);
    if($this->container->has('wsh_lapi.users')) {
        // this throws FatalErrorExecption
        $userService = $this->container->get('wsh_lapi.users');
    }
    // check if that alert does not exist allready
    $alertRepo = $em->getRepository('WshLapiBundle:Alert');
    // todo: do checking

    // create new alert object
    $alert = new Alert();
    $alert->setUser($user);
    $alert->setSearchQueryParams($searchParams);
    $em->persist($alert);
    $em->flush();

    return $alert;

}

function __construct(Container $container)
{
    $this->container = $container;
}

/**
 * Register new user or return existing one based on given AppId token
 * @param $appIdToken unique user token generated in client app
 * @return User
 */
public function registerDevice($appIdToken)
{
    // first let see if user not allready registered
    $em = $this->getDoctrine()->getManager();
    $repo = $em->getRepository('WshLapiBundle:User');
    $user = $repo->findOneByAppId($appIdToken);
    if(!$user) {
        // user not found create new one
        $user = new User();
        $user->setAppId($appIdToken);
        $em->persist($user);
        $em->flush();
    }
    return $user;

}

/**
 * Removes user from database so he's token will no longer be authenticated
 *
 * @param $appIdToken
 * @param $securityToken
 * @return string
 * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
 */
public function unRegisterDevice($appIdToken, $securityToken)
{
    $user = $this->getUser($appIdToken, $securityToken);
    $em = $this->getDoctrine()->getManager();

    $em->remove($user);
    $em->flush();
    return "OK";
}

public function getUser($appIdToken, $securityToken)
{
    // first let see if user not allready registered
    $em = $this->getDoctrine()->getManager();
    $repo = $em->getRepository('WshLapiBundle:User');
    $user = $repo->findOneByAppId($appIdToken);
    if(!$user) {
        throw $this->createNotFoundException('No user with appIdToken: '.$appIdToken.' has been found');
    }
    // check security token
    if(!$user->checkSecurityToken($securityToken)) {
        throw new \Exception('Request not authorized. Tokens does not match');
    }
    return $user;
}

}

原来问题出在我的wsh_lapi.users服务控制器中的函数“getUser”的名称上。可能是与Symfony base controller发生了某种冲突。在我简单地更改函数名称后，它就开始工作了

function __construct(Container $container)
{
    $this->container = $container;
}

/**
 * Register new user or return existing one based on given AppId token
 * @param $appIdToken unique user token generated in client app
 * @return User
 */
public function registerDevice($appIdToken)
{
    // first let see if user not allready registered
    $em = $this->getDoctrine()->getManager();
    $repo = $em->getRepository('WshLapiBundle:User');
    $user = $repo->findOneByAppId($appIdToken);
    if(!$user) {
        // user not found create new one
        $user = new User();
        $user->setAppId($appIdToken);
        $em->persist($user);
        $em->flush();
    }
    return $user;

}

/**
 * Removes user from database so he's token will no longer be authenticated
 *
 * @param $appIdToken
 * @param $securityToken
 * @return string
 * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
 */
public function unRegisterDevice($appIdToken, $securityToken)
{
    $user = $this->getUser($appIdToken, $securityToken);
    $em = $this->getDoctrine()->getManager();

    $em->remove($user);
    $em->flush();
    return "OK";
}

public function getUser($appIdToken, $securityToken)
{
    // first let see if user not allready registered
    $em = $this->getDoctrine()->getManager();
    $repo = $em->getRepository('WshLapiBundle:User');
    $user = $repo->findOneByAppId($appIdToken);
    if(!$user) {
        throw $this->createNotFoundException('No user with appIdToken: '.$appIdToken.' has been found');
    }
    // check security token
    if(!$user->checkSecurityToken($securityToken)) {
        throw new \Exception('Request not authorized. Tokens does not match');
    }
    return $user;
}