Accessing a service inside an event subscriber

Question

I have an event subscriber with Doctrine events. Inside that, I am trying to call a service I have registered. I've called it already from in a controller and it works there, but when I try to call it in my event subscriber I get an error:

Attempted to call method "get" on class "Path\To\My\Class".
Did you mean to call "getSubscribedEvents"?

The code looks like this:

$embedcode_service = $this->get('myproject.mynamespace.myfield.update');
$embedcode_service->refreshMyField($document);

Why can't I access my service inside this event subscriber? How can I get access to it?

Answer 1

Cerad already answered I'm just going to elaborate:

Inject your service in your subscriber:

services:
    ...
    my.subscriber:
            class: Acme\SearchBundle\EventListener\SearchIndexerSubscriber
            # Service you want to inject
            arguments: [ @service_i_want_to_inject.custom ]
            tags:
                - { name: doctrine.event_subscriber, connection: default }
   ...

In the php code for your subscriber, assign the injected service to a class variable to be able to access it later on:

...
class SearchIndexerSubscriber implements EventSubscriber {

private $myservice;

public function __construct($myservice) {
    $this->myservice = $myservice;
}
...

Access the service methods through the class variable from any method within the subscriber:

$this->myservice->refreshMyField($document);

Listeners/subscribers in Symfony2

Services in Symfony2

Happy new year.