Symfony2.3 Better way to get EntityManager inside a Controller
If you must have the EntityManager
available in your constructor, a good way to get it is injecting it to the constructor.
To do this you must define your controller as a service.
# src/Acme/DemoBundle/Resources/config/services.yml
parameters:
# ...
acme.controller.quazbar.class: Acme\DemoBundle\Controller\QuazBarController
services:
acme.quazbar.controller:
class: "%acme.controller.quazbar.class%"
# inject doctrine to the constructor as an argument
arguments: [ @doctrine.orm.entity_manager ]
Now all you have to do is modify your controller:
use Doctrine\ORM\EntityManager;
/**
* QuazBar controller.
*
*/
class QuazBarController extends Controller
{
public function __construct(EntityManager $em)
{
$this->em = $em;
}
// ...
}
If you do not require the Entity Manager
in the constructor, you can simply get it using the Dependency Injection Container from any method in your controller:
$this->getDoctrine()->getManager();
OR
$this->container->get('doctrine')->getManager();
Controller/setter injection is a good choice because you are not coupling your controller implementation to the DI Container.
At the end which one you use is up to your needs.
NBPalomino
Peruvian Teacher, who love programming and learn new languages. El más alto cargo que un ciudadano puede ejercer en una Democracia; Es el de ser Maestro de Escuela - José A. Encinas.
Updated on June 13, 2022Comments
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NBPalomino almost 2 years
I'm using
Symfony2.3
and I currently using EntityManager as shown inside __construct()Which its a better aproach using EntityManager from __construct() or using inside each method ? as shown in public indexAction()
/** * QuazBar controller. * */ class QuazBarController extends Controller { public function __construct() { $this->em = $GLOBALS['kernel']->getContainer()->get('doctrine')->getManager(); } /** * Lists all QuazBar entities. * */ public function indexAction(Request $request) { $session = $request->getSession(); $pagina = $request->query->get('page', 1); $em = $this->getDoctrine()->getManager(); }
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NBPalomino about 10 yearsThanks, but if I have a many Controllers (50~) is not a good idea make all Controller as a Service right?
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Onema about 10 yearsLike I said: "which one you use is up to your needs". Without knowing more about your specific project is difficult to advice how or what else you can do. You may need a base class or use a design pattern. I would just be consistent though out the code, so pick one and stick to it :). Please note that to me the way you are getting the EM in the constructor raises some red flags: the use of the
$GLOBALS
variable being one and the method chaining between multiple objects is another.