Get current logged in user in entity - symfony

Question

I want to create some virtual properties for an entity in an n:m relation.
I have an User, an Achievment and an AchievementUser entity. The value an user have in an Achievement is stored in the field value in the entity AchievementUser.
User -------- 1:n -------- AchievementUser -------- n:1 -------- Achievement
name:String value:Integer name:String
[...] [...]
Now I want to return the value an user have in an achievement with the achievement itself. So I need a virtual property and a method getValue() in the Achievement entity, but to get the corresponding AchievementUser object, I need the ID of the current logged in user.
How can I get this? Or is there an other possiblility to get the user value for an achievement? Thanks for your help!
Edit: I only have an API based application. Only the serializer executes the Getter method. Here is the content of my serializer file:
virtual_properties:
getValue:
serialized_name: value
type: integer
groups: ['achievement_default']

Answer 1

You can implement a method in the Achievement entity and pass the current authenticated user into it from your controller of twig template.
use Doctrine\Common\Collections\Criteria;
// ...
/**
* #return Collection
*/
public function getAchievementUsers(User $user)
{
$criteria = Criteria::create()->where(Criteria::expr()->eq('user', $user));
return $this->achievementUsers->matching($criteria);
}
In case of using a JMS serializer, you can add a virtual field and fill it with data using getAchievementUsers method by defining a serialization listener and injecting the TokenStorage to retrieve the current authenticated user.
<?php
namespace AppBundle\Listener\Serializer;
...
use JMS\Serializer\GenericSerializationVisitor;
use JMS\Serializer\EventDispatcher\ObjectEvent;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
class AchievementSerializerListener
{
/**
* #var User
*/
protected $currentUser;
/**
* #param TokenStorage $tokenStorage
*/
public function __construct(TokenStorage $tokenStorage)
{
$this->currentUser = $tokenStorage->getToken()->getUser();
}
/**
* #param ObjectEvent $event
*/
public function onAchievementSerialize(ObjectEvent $event)
{
if (!$this->currentUser) {
return;
}
/** #var Achievement $achievement */
$achievement = $event->getObject();
/** #var GenericSerializationVisitor $visitor */
$visitor = $event->getVisitor();
$visitor->setData(
'achievement_users',
$achievement->getAchievementUsers($this->currentUser)
);
}
}
services.yml
app.listener.serializer.achievement:
class: AppBundle\Listener\Serializer\AchievementSerializerListener
arguments:
- '#security.token_storage'
tags: [ { name: jms_serializer.event_listener, event: serializer.post_serialize, class: AppBundle\Entity\Achievement, method: onAchievementSerialize } ]