Check if template exists before rendering

symfony twig transclusion
K. Weber picture K. Weber · May 25, 2013 · Viewed 23.5k times · Source

is there a way to check if twig template exists before calling to render? A try catch block seems not to work, at least in dev environment, and plus, I prefer a check than the cost of an exception.

This class TwigEngine has an exists() method, but didn't find examples on use.

Answer

Nicolai Fröhlich picture Nicolai Fröhlich · May 25, 2013

The service holding the twig engine if configured as default is 'templating'.

Inside your Controller do the following:

if ( $this->get('templating')->exists('AcmeDemoBundle:Foo:bar.html.twig') ) {
     // ...
}

The alternative would be catching exception the render() method throws like this:

 try {
      $this->get('templating')->render('AcmeDemoBundle:Foo:bar.html.twig')
  } catch (\Exception $ex) {
     // your conditional code here.
  }

In a normal controller ...

$this->render('...')

is only an alias for ...

$this->container->get('templating')->renderResponse($view, $parameters, $response);

... while ...

$this->get('...')

... is an alias for

$this->container->get('...')

Have a look at Symfony\FrameworkBundle\Controller\Controller.

Related questions

get current url in twig template?

I looked around for the code to get the current path in a Twig template (and not the full URL), i.e. I don't want http://www.sitename.com/page, I only need /page.

Read More
How to render a DateTime object in a Twig template

One of my fields in one of my entities is a "datetime" variable. How can I convert this field into a string to render in a browser? Here is a code snippet: {% for game in games %} ... <td> {{game.…

Read More
How to get config parameters in Symfony2 Twig Templates

I have a Symfony2 Twig template. I want to output the value of a config parameter in this twig template (a version number). Therefore I defined the config parameter like this: parameters: app.version: 0.1.0 I'm able to use this config …

Read More