Symfony - Database connection with a Repository - symfony

Question

I'm refactoring the code in one of my Controller to put it in a service.
In the Controller the entity manager is targeting a db connection called legacy.
The problem is, I did not injected the Entity Manager in my service but just the OrderRepository.
How can I target the good db connection with the repository in my service without the Entity Manager?
OrderController
// In my Controller
$em = $this->getDoctrine()->getManager('legacy');
$em->persist($order);
$em->flush();
OrderService
// In my Service
public function __construct(OrderRepository $orderRepository)
{
$this->orderRepository = $orderRepository;
}
public function updateOrderStatus(Order $order)
{
// some code ...
$this->orderRepository->save($order);
}

Answer 1

Based on some comments it would appear that the basic issue is having multiple entity managers. Nowadays there is a great deal of automated functionality which works well for one entity manager but no so much for multiple managers.
You basically need to define your services manually.
# services.yaml
# assume we have
# doctrine.orm.default_entity_manager and
# doctrine.orm.legacy_entity_manager
# already defined through configuration
# define legacy repository
order_repository.legacy:
class: Whatever\Repository\OrderRepository
factory: ['doctrine.orm.legacy_entity_manager', 'getRepository']
arguments:
- 'Whatever\Entity\Order'
# define default repository
order_repository.default:
class: Whatever\Repository\OrderRepository
factory: ['doctrine.orm.default_entity_manager', 'getRepository']
arguments:
- 'Whatever\Entity\Order'
# then your service
Whatever\Service\MyService:
'#order_repository.legacy'
And you should be good to go. Note that your repository needs to extend EntityRepository and not the doctrine bundle's ServiceEntityRepository.
And if you feel this is too much work then just inject the doctrine bundle's entity manager registry and do what the ControllerTrait::getDoctrine($name) does.

Answer 2

You must forgot that you can always get the entity manager inside your repository just like this:
$em = $this->getEntityManager();
then you can use it normally calling persist, flush etc.
Note that the Repository class itself is agnostic to functionalities of the database access layer like insert or update so it should call entity manager to execute them.