Service injection in a Symfony controller fails - php

Question

I am adding a feature to a Symfony 2.7 application. I have a controller that has been defined as a service, and it in turn takes in another service. Here are the relevant contents from my services.yml file:
app.service.video_derivative:
class: MyCompany\AppBundle\Service\VideoDerivativeService
arguments:
- "#app.repository.video_derivative"
- "#doctrine.orm.default_entity_manager"
api.controller.video_derivative:
class: MyCompany\AppBundle\Controller\VideoDerivativeController
arguments:
- "#app.service.video_derivative"
... and the relevant code in my controller looks like this:
public function __construct(VideoDerivativeServiceInterface $videoDerivativeService)
{
$this->videoDerivativeService = $videoDerivativeService;
}
/**
* #param $id
* #return JsonResponse
*
* #Route("/admin/video-derivative/create-by-clip-id/{id}", name="create_clip_by_id")
*/
public function byClipIdAction($id)
{
$responseArray = [
'foo' => 'bar',
'baz' => 'qux',
];
return new JsonResponse($responseArray);
}
... but when I pull up my controller in a browser, I get the following message:
Catchable Fatal Error: Argument 1 passed to
MyCompany\AppBundle\Controller\VideoDerivativeController::__construct()
must be an instance of
MyCompany\AppBundle\Service\VideoDerivativeServiceInterface, none given,
called in /usr/src/app/app/cache/dev/classes.php on line 2200 and
defined
... so it looks like I'm doing something wrong. How would you go about debugging this?

Answer 1

It turned out that what I needed was this annotation over the class:
/**
* #\Sensio\Bundle\FrameworkExtraBundle\Configuration\Route(service="api.controller.video_derivative")
*/
Once that was in place, I got a much more helpful error and was able to move on with development.