Silex & Twig helpers in custom error pages

Question

I'm struggling with a problem while trying to render a custom error page in Silex.

According to what I found in this link :http://refactoring.us/silex/custom-error-pages-with-silex-and-twig/

I am trying to set up a custom 404 error page in my application. Everything works fine until I start to use helpers in my twig template.

An exemplary code for 404 error page template is as follows :

{% extends "layout.html.twig" %}  {% block main %} <div id="error404">     <h2>{{ app.translator.trans('page404.title') }}</h2>     <p>{{ app.translator.trans('page404.para1') }}</p>     <p class="btn-footer">         <a href="{{ url('home') }}" class="btn">{{ app.translator.trans('page404.button') }}</a>     </p> </div> {% endblock %} 

PHP code for error handling in my Silex app:

$app->error(function (\Exception $e, $code) use($app) {     switch ($code) {         case 404:             $message = $app['twig']->render('error404.html.twig');             break;         default:             $message = $app['twig']->render('error500.html.twig');     }     return new Response($message, $code); }); 

Once i remove

{{ url('home') }}

(this helper and route works perfectly in other cases!) I get the proper rendered site, but without the translations.

With the helper, I get the following error:

Fatal error: Uncaught exception 'Symfony\Component\Routing\Exception\RouteNotFoundException' with message 'Route "" does not exist.' in D:\projects\projectname\application\vendor\symfony\routing\Symfony\Component\Routing\Generator\UrlGenerator.php:119 Stack trace:  #0 D:\projects\projectname\application\vendor\symfony\twig-bridge\Symfony\Bridge\Twig\Extension\RoutingExtension.php(45): Symfony\Component\Routing\Generator\UrlGenerator->generate(NULL, Array, false)  #1 D:\projects\projectname\application\vendor\twig\twig\lib\Twig\Environment.php(327) : eval()'d code(68): Symfony\Bridge\Twig\Extension\RoutingExtension->getPath(NULL, Array)  #2 D:\projects\projectname\application\vendor\twig\twig\lib\Twig\Template.php(265): __TwigTemplate_ca53e56b87abd45da5c34a79d4c2ce34->doDisplay(Array, Array)  #3 D:\projects\projectname\application\vendor\twig\twig\lib\Twig\Template.php(239): Twig_Template->displayWithErrorHandling(Array, Array)  #4 D:\projects\projectname\application\vendor\twig\twig\lib\Twig\Envir in D:\projects\projectname\application\vendor\twig\twig\lib\Twig\Template.php on line 280 

So I need some guidance here on what could be the possible reason behind this that is causing this and steps to resolve this issue. All help appreciated.

Answer 1

This is not a Silex problem (as of now) - Everything works perfectly on my side (Silex 1.2)

Did you register the UrlGeneratorServiceProvider in your app ?

in web/index.php:

$app->register(new Silex\Provider\UrlGeneratorServiceProvider()); 

And you should really use path() instead of url()in this case :

{{ path('home') }}