Doctrine Collection Entities not fully populated - php

Question

I made a mapping of 4 entities, but when I view the objects in the collection , all objects are populated except the last.
Here Entities
User.php
/**
* User
*
* #ORM\Table(name="`user`")
* #ORM\Entity(repositoryClass="icgo\AdminBundle\Repository\UserRepository")
*/
class User extends BaseUser
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=255,nullable=false)
* #Assert\NotBlank()
* #Assert\NotNull()
*/
private $name;
/**
* #var string
*
* #ORM\Column(name="surname", type="string", length=255,nullable=false)
* #Assert\NotBlank()
* #Assert\NotNull()
*/
private $surname;
/**
*
* #ORM\OneToMany(targetEntity="Affectation",mappedBy="user",cascade={"persist"})
* #ORM\JoinColumn(nullable=false)
*/
private $affectations;
public function __construct()
{
parent::__construct();
$this->affectations = new \Doctrine\Common\Collections\ArrayCollection();
}
...... getters and setters ....
Affectation.php
/**
* Affectation
*
* #ORM\Table(name="affectation")
* #ORM\Entity(repositoryClass="icgo\AdminBundle\Repository\AffectationRepository")
*/
class Affectation
{
/**
* #ORM\Id
* #ORM\ManyToOne(targetEntity="User",inversedBy="affectations",cascade={"persist"})
* #ORM\JoinColumn(name="uid",referencedColumnName="id")
*/
private $user;
/**
* #ORM\Id
* #ORM\ManyToOne(targetEntity="icgo\WorkPlaceBundle\Entity\Workplace",inversedBy="affectations",cascade={"persist"})
* #ORM\JoinColumn(name="wid",referencedColumnName="id")
*/
private $workplace;
/**
* #ORM\Id
* #ORM\ManyToOne(targetEntity="Role",inversedBy="affectations",cascade={"persist"})
* #ORM\JoinColumn(name="rid",referencedColumnName="rid")
*/
private $role;
.... getters and setters .....
Workplace.php
/**
* workplace
*
* #ORM\Table(name="workplace")
* #ORM\Entity(repositoryClass="icgo\WorkPlaceBundle\Repository\WorkplaceRepository")
*/
class Workplace
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="wfa", type="string", length=1, nullable=false)
*/
private $famille;
/**
* #var string
*
* #ORM\Column(name="nickname", type="string", length=255)
* #Assert\NotBlank()
* #Assert\NotNull()
*/
private $nickname;
/**
* #var \DateTime
*
* #ORM\Column(name="date_start", type="date")
* #Assert\Date()
*/
private $dateStart;
/**
* #var \DateTime
*
* #ORM\Column(name="date_end", type="date")
* #Assert\Date()
*/
private $dateEnd;
/**
* #var string
*
* #ORM\Column(name="label_short", type="string", length=255)
* #Assert\NotBlank()
* #Assert\NotNull()
*/
private $labelShort;
/**
* #var string
*
* #ORM\Column(name="label_long", type="text")
*/
private $labelLong;
/**
*
* #ORM\OneToMany(targetEntity="icgo\AdminBundle\Entity\Affectation",mappedBy="workplace")
* #ORM\JoinColumn(nullable=false)
*/
private $affectations;
.... getters and setters .....
Role.php
/**
* Role
*
* #ORM\Table(name="role")
* #ORM\Entity(repositoryClass="icgo\AdminBundle\Repository\RoleRepository")
*/
class Role
{
/**
* #var int
*
* #ORM\Column(name="rid", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="label_short", type="string", length=255)
* #Assert\NotBlank()
* #Assert\NotNull()
*/
private $labelShort;
/**
* #var string
*
* #ORM\Column(name="label_long", type="text", nullable=false)
*/
private $labelLong;
/**
*
* #ORM\OneToMany(targetEntity="Affectation",mappedBy="role")
* #ORM\JoinColumn(nullable=false)
*/
private $affectations;
.... getters and setters ......
UserRepository.php
class UserRepository extends \Doctrine\ORM\EntityRepository
{
public function getUsers(){
$query = $this->createQueryBuilder('u')
->select('u','a','r')
->addSelect('w')
->leftJoin('u.affectations','a')
->leftJoin('a.workplace','w')
->leftJoin('a.role','r')
->getQuery();
return $query->getResult();
}
}
Result dump
Dump image
As see, for the last object User , the table assignments, workplace and role objects are null. All the previous user are populated
Thanks for help