Issue when trying to use doctrine queryBuilder - php

Question

I have two entities Categorie and ChampCat with ManyToMany relation and I want to get list of categories with related ChampCat by using doctrine QueryBuilder so I have used this query:
class CategorieRepository extends \Doctrine\ORM\EntityRepository
{
public function myFindCategories(array $tab){
$em = $this->getEntityManager();
$query = $em->select(array('cat', 'ch'))
->from('AnnonceBundle\Entity\Categorie', 'cat')
->join('cat.champsCat', 'ch')
->where('cat.id In (:tabOfIds)')
->setParameter('tabOfIds', array_values($tab))
->getQuery();
return $query->getResult();
}
}
Here u can see the Categorie Entity:
<?php
namespace AnnonceBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Categorie
*
* #ORM\Table(name="categorie")
* #ORM\Entity(repositoryClass="AnnonceBundle\Repository\CategorieRepository")
*/
class Categorie implements \JsonSerializable
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="refCat", type="string", length=100)
*/
private $refCat;
/**
* #var string
*
* #ORM\Column(name="libelleCat", type="string", length=50)
*/
private $libelleCat;
/**
* #ORM\ManyToMany(targetEntity="AnnonceBundle\Entity\ChampCat",cascade={"persist"})
*/
private $champsCat;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set refCat
*
* #param string $refCat
*
* #return Categorie
*/
public function setRefCat($refCat)
{
$this->refCat = $refCat;
return $this;
}
/**
* Get refCat
*
* #return string
*/
public function getRefCat()
{
return $this->refCat;
}
/**
* Set libelleCat
*
* #param string $libelleCat
*
* #return Categorie
*/
public function setLibelleCat($libelleCat)
{
$this->libelleCat = $libelleCat;
return $this;
}
/**
* Get libelleCat
*
* #return string
*/
public function getLibelleCat()
{
return $this->libelleCat;
}
/**
* Set champsCat
*
* #param \AnnonceBundle\Entity\ChampCat $champsCat
*
* #return Categorie
*/
public function setChampsCat(\AnnonceBundle\Entity\ChampCat $champsCat = null)
{
$this->champsCat = $champsCat;
return $this;
}
/**
* Get champsCat
*
* #return \AnnonceBundle\Entity\ChampCat
*/
public function getChampsCat()
{
return $this->champsCat;
}
/**
* Constructor
*/
public function __construct()
{
$this->champsCat = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Add champsCat
*
* #param \AnnonceBundle\Entity\ChampCat $champsCat
*
* #return Categorie
*/
public function addChampsCat(\AnnonceBundle\Entity\ChampCat $champsCat)
{
$this->champsCat[] = $champsCat;
return $this;
}
/**
* Remove champsCat
*
* #param \AnnonceBundle\Entity\ChampCat $champsCat
*/
public function removeChampsCat(\AnnonceBundle\Entity\ChampCat $champsCat)
{
$this->champsCat->removeElement($champsCat);
}
function jsonSerialize()
{
return get_object_vars($this);
}
}
And this is ChamCat Entity:
<?php
namespace AnnonceBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* ChampCat
*
* #ORM\Table(name="champ_cat")
* #ORM\Entity(repositoryClass="AnnonceBundle\Repository\ChampCatRepository")
*/
class ChampCat implements \JsonSerializable
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
*#var string
*
* #ORM\Column(name="refCh", type="string")
*/
private $refCh;
/**
* #var string
*
* #ORM\Column(name="nom_ch", type="string", length=255)
*/
private $nomCh;
/**
* #var bool
*
* #ORM\Column(name="app_ch", type="boolean")
*/
private $appCh;
/**
* #var string
*
* #ORM\Column(name="format_ch", type="string", length=255)
*/
private $formatCh;
/**
* Get id
*
* #return string
*/
public function getId()
{
return $this->refCh;
}
/**
* Set refCh
*
* #param integer $refCh
* #return ChampCat
*/
public function setRefCh($refCh)
{
$this->refCh = $refCh;
return $this;
}
/**
* Get refCh
*
* #return integer
*/
public function getRefCh()
{
return $this->refCh;
}
/**
* Set nomCh
*
* #param string $nomCh
* #return ChampCat
*/
public function setNomCh($nomCh)
{
$this->nomCh = $nomCh;
return $this;
}
/**
* Get nomCh
*
* #return string
*/
public function getNomCh()
{
return $this->nomCh;
}
/**
* Set appCh
*
* #param boolean $appCh
* #return ChampCat
*/
public function setAppCh($appCh)
{
$this->appCh = $appCh;
return $this;
}
/**
* Get appCh
*
* #return boolean
*/
public function getAppCh()
{
return $this->appCh;
}
/**
* Set formatCh
*
* #param string $formatCh
* #return ChampCat
*/
public function setFormatCh($formatCh)
{
$this->formatCh = $formatCh;
return $this;
}
/**
* Get formatCh
*
* #return string
*/
public function getFormatCh()
{
return $this->formatCh;
}
function jsonSerialize()
{
return get_object_vars($this);
}
}
Unfortunately this query didn't work, so what am I missing ?

Answer 1

Is it working with this syntax?
public function myFindCategories(array $tab){
if(count($tab) == 0) return []; //or IN() will bug with an empty array
$query = $this->createQueryBuilder('cat')
->addSelect('ch')
->innerJoin('cat.champsCat', 'ch')
->where('cat.id in (:tabOfIds)')
->setParameter('tabOfIds', $tab)
->getQuery();
return $query->getResult();
}