Sonata Admin Enable action - symfony

Question

I'm using Symfony for make a web site and I installed sonata admin Bundle.
I have an entity with a boolean variable (enable).
I would like when this variable change state to True the other one for the same table go to False. In fact I would like only one variable (enable) for the same table is at True.
So I thought to change setEnable directly in my Entity but I can't get the repository from my Entity class.
How can I get my repository from my Entity Class ?

Answer 1

You should use lifecycleCallbacks to do this (with preUpdate), check doc for a good configuration.
And do something like this :
public function preUpload()
{
if ($this->getVariable1())
$this->setVariable2(false);
}

Answer 2

I think you might change prospective.
If this behavior is a logic of your application it's better to do a doctrine subscriber. So when you persist or update your entity it's will be checked.
Take a look at http://symfony.com/doc/current/cookbook/doctrine/event_listeners_subscribers.html
In your specific case this will be done with this simple code:
use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event\LifecycleEventArgs;
class ObjectSubscriber implements EventSubscriber
{
public function __construct($objectManager)
{
}
public function getSubscribedEvents()
{
return array(
'postPersist',
'postUpdate',
);
}
public function postUpdate(LifecycleEventArgs $args)
{
$this->manage($args);
}
public function postPersist(LifecycleEventArgs $args)
{
$this->manage($args);
}
public function manage(LifecycleEventArgs $args)
{
$entity = $args->getEntity();
if ($entity instanceof YourEntity) {
if ($entity->getEnable()) {
$em = $args->getEntityManager();
$entities = $em->getRepository('YourEntityRepository')->findByEnable(true);
foreach ($entities as $e) {
if ($e->getId() == $entity->getId()) {
continue;
}
$e->setEnable(false);
}
$em->flush();
}
}
}
}