Question

Instead of extending the standard controller, I’d like to inject Twig into one of my classes.

Controller:

namespace Project\SomeBundle\Controller;

use Twig_Environment as Environment;

class SomeController
{
    private $twig;

    public function __construct( Environment $twig )
    {
        $this->twig    = $twig;
    }

    public function indexAction()
    {
        return $this->twig->render(
            'SomeBundle::template.html.twig', array()
        );
    }
}

and then in services.yml I have the following:

project.controller.some:
    class: Project\SomeBundle\Controller\SomeController
    arguments: [ @twig ]

The error I’m getting is:

SomeController::__construct() must be an instance of Twig_Environment, none given

But I’m passing in @twig via config. I can’t see what I’m doing wrong.

Edit:

Adding in the correct code – this is what fixed the problem:

// in `routing.yml` refer to the service you defined in `services.yml` 
project.controller.some
    project_website_home:
        pattern:  /
        defaults: { _controller: project.controller.some:index }

Answer 1

1. Try clearing your cache.

2. Is your route set up to refer to the controller as a service? If not, Symfony won’t utilize the service definition, and therefore any arguments you specify.