Symfony, How to generate Asset URL in a Twig Extension class?

Question

I have one class which extends `\Twig_Extension` like below : ``` class MYTwigExtension extends \Twig_Extension { protected $doctrine; protected $router; public function __construct(RegistryInterface $doctrine , $router) { $this->doctrine = $doctrine; $this->router = $router; } public function auth_links($user , $request) { // Some other codes here ... // HOW TO GENERATE $iconlink which is like '/path/to/an/image' $html .= " $\"\"$ "; echo $html; } } ``` My question is How to generate Asset links in a Twig Extension ? I would like a replacement for ASSET helper in my class. Bassically I have no idea what I have to inject or use here ! Thanks in advance. ```

```

Accepted Answer

You can use the templating.helper.assets service directly.

```
use Symfony\Component\DependencyInjection\ContainerInterface;

public function __construct(ContainerInterface $container)
{
    $this->container = $container;
}
```

and use it like so:

```
$this->container->get('templating.helper.assets')->getUrl($iconlink);
```

Injecting just the templating.helper.assets directly does not work in this case because the twig extension cannot be in the request scope. See the documentation here: https://symfony.com/doc/2.3/cookbook/service_container/scopes.html#using-a-service-from-a-narrower-scope

Symfony, How to generate Asset URL in a Twig Extension class?

Solution

Problem