从twig文件调用时，不会在控制器中访问$

时间：2015-12-03 13:10:43

标签： php symfony

我尝试通过从twig文件中调用名为MetaController的控制器来渲染元标记。

<head>
    {{ render(controller('AppBundle:Meta:seoOptimizedMeta')) }}

问题是当我尝试在控制器中访问$ this时，我得到空白页面。因此，当从一个twig文件调用时，似乎$ this的链接丢失了，所以我想知道我应该如何获取$ this指针以便执行我的数据库调用方法等... 

class MetaController extends Controller {
    public function seoOptimizedMetaAction()
    {
        $request = Request::createFromGlobals();
        $repo = $this->getDoctrine()->getRepository('AppBundle:Product');
        return new Response('<meta charset="UTF-8" />'); //testing
    }
}

为了测试，

class MetaController extends Controller {
    public function seoOptimizedMetaAction()
    {
        $request = Request::createFromGlobals();
        print_r($this);
        return new Response('<meta charset="UTF-8" />'); //testing
    }
}

dev.log包含，

[2015-12-03 14:23:22] request.INFO: Matched route "homepage". {"route_parameters":{"_controller":"AppBundle\\Controller\\DefaultController::indexAction","_route":"homepage"},"request_uri":"http://localhost/mysnip/web/app_dev.php/"} []
[2015-12-03 14:23:22] security.INFO: Populated the TokenStorage with an anonymous Token. [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::configure". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\ProfilerListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\DumpListener::configure". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Bundle\FrameworkBundle\EventListener\SessionListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\FragmentListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\TranslatorListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\Security\Http\Firewall::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Bundle\AsseticBundle\EventListener\RequestListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Symfony\Bundle\FrameworkBundle\DataCollector\RouterDataCollector::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Symfony\Component\HttpKernel\DataCollector\RequestDataCollector::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\ControllerListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\ParamConverterListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\HttpCacheListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\SecurityListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\TemplateListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::configure". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\ProfilerListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\DumpListener::configure". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Bundle\FrameworkBundle\EventListener\SessionListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\FragmentListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\TranslatorListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Component\Security\Http\Firewall::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.request" to listener "Symfony\Bundle\AsseticBundle\EventListener\RequestListener::onKernelRequest". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Symfony\Bundle\FrameworkBundle\DataCollector\RouterDataCollector::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Symfony\Component\HttpKernel\DataCollector\RequestDataCollector::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\ControllerListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\ParamConverterListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\HttpCacheListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\SecurityListener::onKernelController". [] []
[2015-12-03 14:23:22] event.DEBUG: Notified event "kernel.controller" to listener "Sensio\Bundle\FrameworkExtraBundle\EventListener\TemplateListener::onKernelController". [] []

浏览器中有一个简单的空白页面！

1 个答案:

答案 0 :(得分：0)

  1. 我发现我的错误问题是我的代码，获取$ this的详细信息对于twig文件来说可能太多了。所以，应该严格避免使用print_r或var_dump。
  2. 您还可以通过$this->get('request_stack')获取RequestStack。

    3. 我的问题已经解决了，感谢@Yoshi的建议。

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