How can I inject doctrine into Symfony2 service

Question

I use simplified controller and have no service container. I\'m trying to inject doctrine into a service. Here is the error:

ContextErrorException: Catchable Fat         


        

Answer 1

The problem is that you're mixing both YAML service definition and DiExtra annotations for the same class. The YAML definition is full and provides the required dependency, but you haven't added @InjectParams to play with the @Service annotation. Basically, you're creating two services of the single class using different approaches and the annotations approach is not complete.

Either remove the @Service annotation from the class, or, if you prefer annotations (which I do), inject the dependencies with annotations too and get rid of the YAML service definition:

/**
 * @InjectParams({
 *    "em" = @Inject("doctrine.orm.entity_manager")
 * })
 */
public function __construct(EntityManager $em)
{
    $this->em = $em;
}

The @InjectParams annotation matches parameter names like $em to service names like @em. Since there is no @em service, you have to override the default matching with the @Inject annotation.

But there is a way to simplify it. You can alias the entity manager to @em in your YAML configuration file:

services:
    em:
        alias: doctrine.orm.entity_manager

Now you can simplify the @InjectParams annotation:

/**
 * @InjectParams
 */
public function __construct(EntityManager $em)
{
    $this->em = $em;
}