I'm doing a query on an entity, but of course I am asked to instantiate doctrine entityManager my serious question:
As instantiate the EntityManager to use in the entity.
Excuse my English, I am using google truth XD, as not meeting ZF2 communities and Doctrine2 in Spanish.
If I understood your question you want to get the entityManager inside your Doctrine entities, right ?
I don't think it's good idea to usee the EntityManager within your Doctrine entities. But for this, you need first to get an instance of the service manager in your entity class.
By default, the Zend Framework MVC registers an initializer that will inject the ServiceManager instance, which is an implementation of
Zend\ServiceManager\ServiceLocatorInterface, into any class implementingZend\ServiceManager\ServiceLocatorAwareInterface
For Doctrine, we have to make the service manager available within the entities. So You have to implement the ServiceLocatorAwareInterface for each entity or simpler create a class which implements Zend\ServiceManager\ServiceLocatorAwareInterface and then simply make the entities that need access to the service manager inherit from this class.
Here is a good post on HOW TO INJECT ZF2 SERVICE MANAGER INTO DOCTRINE ENTITIES
Following this post, you could simply get the entityManager within your entity like this :
$em = $this->getServiceLocator()->get('Doctrine\ORM\EntityManager');
