Symfony2控制器导航栏

Question

i would put a controller for my navbar and i would use a query to get a variable from my database.. I don't have a controller and i create it in this way:

<?php

  namespace Dt\EcBundle\Controller;

  use Symfony\Bundle\FrameworkBundle\Controller\Controller;
  use Symfony\Component\HttpFoundation\Request;

  class NavbarController extends Controller {

public function navbarAction(Request $request) {
    $prova = "ciao";       
    return $this->render('DtEcBundle:Header:navbar.html.twig',array(
            "prova" => $prova,

    ));
    }
 }

Now i put my render controller in the body of : " {# app/Resources/views/base.html.twig #} "

{{ render(controller('DtEcBundle:Navbar:navbar', { 'prova': prova })) }}

I follow this but i don t understand the error: " http://symfony.com/doc/current/book/templating.html#embedding-controllers "

I Get this error Variable "prova" does not exist in DtEcBundle:Header:navbar.html.twig at line 5 but if i write the code in navbar.html.twig give me equals error.. If i remove the variable and i write only

{{ render(controller('DtEcBundle:Navbar:navbar')) }}

Give me a server error number 500 oo. How can i do for use my controller only in navbar.html.twig??

Answer 1

The error is the code:

{{ render(controller('DtEcBundle:Navbar:navbar', { 'prova': prova })) }}

the prova variable doesn't exists in twig, the controller is fine. I if you want put the var from twig to controller:

 /**
 * @Route("/prova/{prova}", name="prova")
 */
public function navbarAction(Request $request,$prova) {      
    return $this->render('DtEcBundle:Header:navbar.html.twig',array(
            "prova" => $prova,

    ));
}

and twig:

{% set prova = 'foo' %}
{{ render(controller('DtEcBundle:Navbar:navbar', { 'prova': prova })) }}

Answer 2

navbarAction doesn't take prova variable as a parameter, so why are you passing it there in a base template?

I think that action should fetch these data from db.

In that case, using:

{{ render(controller('DtEcBundle:Navbar:navbar')) }}

seems to be ok, and error is somewhere else.

If you get a 500, check logs to tell us what's exactly wrong.

And format your code, it's barely readable.