Using Doctrine's EntityManager in a repository design - php

Question

I'm trying to implement a repository pattern in my zend framework 2 application. I have made a service
<?php
class UserService {
private $userRepository;
public function __construct(IUserRepository $repo) {
$this -> userRepository = $repo;
}
public function createUser($params) {
$this -> userRepository -> create($params);
}
public function findAllUsers() {
return $this -> userRepository -> getAllUsers();
}
}
which has a repository that implements an interface
class UserRepository implements IUserRepository {
public function getAllUsers() {
//return all users
}
public function getUserById($id) {
}
public function getOneUser($params){
}
public function getUsers($params){
}
public function create($params){
}
public function update($params){
}
public function delete($params){
}
}
<?php
interface IUserRepository {
public function getAllUsers();
public function getUserById($id);
public function getOneUser($params);
public function getUsers($params);
public function create($params);
public function update($params);
public function delete($params);
}
In my module.php I make use of dependency injection to determine which repository I inject into a controller
public function getControllerConfig() {
return array('factories' => array(
'My\Controller\Accounts' => function(){
return new AccountsController(new UserRepository());
},
),
);
}
In my controller I pass the repository to my service
class AccountsController extends AbstractActionController {
private $service;
public function __construct(IUserRepository $repo) {
$this->service = new UserService($repo);
}
public function indexAction() {
$all_users = $this->service->findAllUsers();
return new ViewModel(array('users' => $all_users));
}
}
My problem is that I'm using Doctrine as Orm and I want to use the entitymanager in my repositories but I don't know how to do that, any ideas and feedback are appreciated

Answer 1

There are several ways to do this, of course. The typical way you'd do this kind of thing in a ZF2/D2 project would be to start with DoctrineORMModule.
That module exposes Doctrine's EntityManager via the ZF2 Service Manager in a variety of handy ways (you can $sm->get('doctrine.entitymanager.orm_default') to explicitly get the EM instance).
Once you can get your entitymanager from the SM, you write a factory for your repository, and inject the EM.
That said, there's a cleaner way. Doctrine has built-in support for repositories, and you can extend the default implementation.
Your repository would then look like this:
<?php
use Doctrine\ORM\EntityRepository;
class UserRepository extends EntityRepository implements IUserRepository {
public function getAllUsers() {
return $this->findAll();
}
// ...
}
Just remember to add the repository class to the User Entity's metadata. For example, with an annotation:
/**
* #ORM\Entity(repositoryClass="MyDomain\Model\UserRepository")
*/
class User
{
}