Symony find in array Type - arrays

Question

From a form of symfony I stock several values in a doctrine Array.
Then I want to do a findBy in my controller to find entites with an Id.
My entity:
<?php
/**
* Questionnaire
*
*/
class Questionnaire
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* #var text
*
* #ORM\Column(name="description", type="text")
*/
private $description;
/**
* add unit list
* #Exclude
* #ORM\Column(name="unitids", type="array")
*/
private $unitsId = array();
public function __construct()
{
$this->unitsId = array();
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
* #return Questionnaire
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
/**
* Set description
*
* #param string $description
* #return Questionnaire
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Get description
*
* #return string
*/
public function getDescription()
{
return $this->description;
}
/**
* Set unitsId
*
* #param array $unitsId
* #return Questionnaire
*/
public function setUnitsId($unitsId)
{
$this->unitsId = $unitsId;
return $this;
}
/**
* Get unitsId
*
* #return array
*/
public function getUnitsId()
{
return $this->unitsId;
}
}
What I want to do in my controller is to find all questionnaires which have the X unitId in UnitsId.
I tried :
$entities = $em->getRepository('Questionnaire')->findBy(array('unitsId'=>$unitId ));
But it does not work.
Is theire a way to do this ?
Thank you in advance

Answer 1

No, You can't do this with a Query, first You have to recover the Questionnaire object, then you have to iterate for the array because Doctrine Saves in database the array serialized and it is a lot of garbage, so You can't query directly.
find the questionarie.
Doctrine unserialize the array automatically
Iterate in the array and find the correct id.
return the result.
I Hope it Helps

Answer 2

I think you have to use QueryBuilder to fetch objects from joined query.