Get User in a Doctrine EventListener

when I register a new Plasmid Entity, I want give him an automatic name (like: p0001, p0002, p0003), to do this, I need to select in the database the last Plasmid entity for a specific User, get its autoName, and use this previous name to define the new one.

But, when I inject the token_storage in my listener, the token is null... In the controller, I can have the user, it's work.

The service.yml

app.event_listener.plasmid:
class: AppBundle\EventListener\PlasmidListener
arguments: ["@security.token_storage"]
tags:
- { name: doctrine.event_listener, event: prePersist }

And, the PlasmidListener

class PlasmidListener
{
private $user;

public function __construct(TokenStorage $tokenStorage)
{
$this->user = $tokenStorage->getToken()->getUser();
}

public function prePersist(LifecycleEventArgs $args)
{
$entity = $args->getEntity();

// If the entity is not a Plasmid, return
if (!$entity instanceof Plasmid) {
return;
}

// Else, we have a Plasmid, get the entity manager
$em = $args->getEntityManager();

// Get the last plasmid Name
$lastPlasmid = $em->getRepository('AppBundle:Plasmid')->findLastPlasmid($this->user);

// Do something with the last plasmid in the database
}
}

If someone know why I can get the actual user in the Doctrine Listener ?

Thanks

I think that you should store pointer to tokenStorage class in your service instead of user object:

class PlasmidListener
{
private $tokenStorage;

public function __construct(TokenStorage $tokenStorage)
{
$this->tokenStorage = $tokenStorage;
}

public function prePersist(LifecycleEventArgs $args)
{
$user = $this->tokenStorage->getToken()->getUser();
//...
}
}

To avoid error in Symfony4 and above, use **TokenStorageInterface** instead of TokenStorage

For example

use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;

And in your constructor :

public function __construct(TokenStorageInterface $tokenStorage)
{
$this->tokenStorage = $tokenStorage;
}

To get the user and its details in **prePersist** :

$user = $this->tokenStorage->getToken()->getUser();