Access Service from Controller and/or Twig template

Question

Disclaimer: I'm slowly starting to get into Symfony and still have some problems understanding how the architecture works. Currently I set up different Bundles (Services, right?) that should deliver different output for different routes. So far I got around adding a simple Twig template that loads stylesheets and scripts via Assetics and Twig-blocks. Now I added another Bundle that queries data via Buzz from a remote location, which worked fine as a standalone script, but I don't get around printing output in a Twig template. The architecture of the original script is like the following (names made more generic): - Vendors - `abstract` class that serves as base for all remote request Bundles. - ServiceABC - `abstract` class that extends `Vendors` and defines Error handling and output preparation for the ABC service. - ClientXYZ - `final` class that extends `Service_ABC`, defines output parsing and normalization of the returned data. This Bundle got a `services.yml` file: ``` # ~/MyApp…

Accepted Answer

You should not call your services from the twig file, but from the controller.

The role of the controller is to :

- validate your forms if there were a form posted

- call your services to get some stuffs to display in a view

- initialize forms if there is a form to display

- return a Response that typically contains a rendered twig view

Do not call your services using something like `$client = new ClientLocation();`, but call it using the service container. This will allow you to take the whole power of the dependancy injection offered by Symfony2.

Your controller will look like :

```
<?php

namespace MyApp\Bundle\ServiceABCBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class DefaultController extends Controller
{

public function indexAction()
    {
        $locationService = $this->container->get('location_manager');

$someStuffs = $locationService->someMethod();

$response = $this->render(
           'ServiceABCBundle:Default:index.html.twig', array('stuffs' => $someStuffs)
        );

return $response;
    }

}
```

From your twig file, you'll be able to use the `stuffs` variable :

- `{{ stuffs }}` if your variable is a terminal ( a string, a number... )

- `{{ stuffs.attribute }}` if your variable is an object or an array

About your services file, I am a bit confused, because your architecture does not look to be the standard Symfony2's one :

```
# ~/MyApp/Bundle/ServiceABCBundle/Resources/config/services.yml
```

Why your `services.yml` file isn't in the `src/MyApp/SomethingBundle/Resources/config/` directory?

If you didn't already read it, I suggest you to have a look to the Symfony2 : The Big Picture documentation, which is the best way to start with Symfony2.

Access Service from Controller and/or Twig template

Solution

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