How this MySQL query will be in Doctrine DQL? - php

Question

I have below query in MySQL:
SELECT * FROM (orders)
INNER JOIN links ON orders.ref_id = links.id
INNER JOIN users ON links.user_id = users.id
WHERE links.user_id=2
And three entities in Symfony: order, link, user.
How can I write this in Doctrine Query Builder?
$repo = $em->getRepository('OrderBundle:Order');
$queryBuilder=$repo->createQueryBuilder('o');
$query = $queryBuilder
->select('o, l, u')
->innerJoin('c.ref_id', 'l')
->innerJoin('l.user_id', 'u')
->where('u.id=1')
->getQuery();
This doesn't work. I got below error:
[Semantical Error] line 0, col 84 near 'u WHERE u.id': Error: Class OrderBundle\Entity\Order has no association named user_id
I trying for two hours and this make me angry... Thanks in advance.
My order entity:
<?php
// src/OrderBundle/Entity/Order.php
namespace OrderBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints\DateTime;
/**
* #ORM\Entity
* #ORM\Table(name="orders")
*/
class Order
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\ManyToOne(targetEntity="OrderBundle\Entity\Order")
* #ORM\JoinColumn(name="ref_id", referencedColumnName="id")
*/
protected $ref_id;
/**
* #ORM\Column(type="datetime")
*/
protected $date_created;
/**
* #ORM\Column(type="string", length=60)
*/
protected $email;
/**
* #ORM\Column(type="string", length=60)
*/
protected $email2;
/**
* #ORM\Column(type="integer")
*/
protected $service;
/**
* #ORM\Column(type="string", length=20)
*/
protected $fromlang;
/**
* #ORM\Column(type="string", length=20)
*/
protected $tolang;
/**
* #ORM\Column(type="boolean")
*/
protected $academic;
/**
* #ORM\Column(type="string", length=40)
*/
protected $discipline;
/**
* #ORM\Column(type="text")
*/
protected $notes;
/**
* #ORM\Column(type="string")
*/
protected $file;
/**
* #ORM\Column(type="integer")
*/
protected $status;
/**
* #ORM\Column(type="integer")
*/
protected $cost;
/**
* #ORM\Column(type="string", length=2)
*/
protected $site;
public function __construct()
{
$this->date_created = new DateTime();
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set dateCreated
*
* #param \DateTime $dateCreated
*
* #return Order
*/
public function setDateCreated($dateCreated)
{
$this->date_created = $dateCreated;
return $this;
}
/**
* Get dateCreated
*
* #return \DateTime
*/
public function getDateCreated()
{
return $this->date_created;
}
/**
* Set email
*
* #param string $email
*
* #return Order
*/
public function setEmail($email)
{
$this->email = $email;
return $this;
}
/**
* Get email
*
* #return string
*/
public function getEmail()
{
return $this->email;
}
/**
* Set email2
*
* #param string $email2
*
* #return Order
*/
public function setEmail2($email2)
{
$this->email2 = $email2;
return $this;
}
/**
* Get email2
*
* #return string
*/
public function getEmail2()
{
return $this->email2;
}
/**
* Set refId
*
* #param integer $refId
*
* #return Order
*/
public function setRefId($refId)
{
$this->ref_id = $refId;
return $this;
}
/**
* Get refId
*
* #return integer
*/
public function getRefId()
{
return $this->ref_id;
}
/**
* Set service
*
* #param integer $service
*
* #return Order
*/
public function setService($service)
{
$this->service = $service;
return $this;
}
/**
* Get service
*
* #return integer
*/
public function getService()
{
return $this->service;
}
/**
* Set fromlang
*
* #param string $fromlang
*
* #return Order
*/
public function setFromlang($fromlang)
{
$this->fromlang = $fromlang;
return $this;
}
/**
* Get fromlang
*
* #return string
*/
public function getFromlang()
{
return $this->fromlang;
}
/**
* Set tolang
*
* #param string $tolang
*
* #return Order
*/
public function setTolang($tolang)
{
$this->tolang = $tolang;
return $this;
}
/**
* Get tolang
*
* #return string
*/
public function getTolang()
{
return $this->tolang;
}
/**
* Set academic
*
* #param boolean $academic
*
* #return Order
*/
public function setAcademic($academic)
{
$this->academic = $academic;
return $this;
}
/**
* Get academic
*
* #return boolean
*/
public function getAcademic()
{
return $this->academic;
}
/**
* Set discipline
*
* #param string $discipline
*
* #return Order
*/
public function setDiscipline($discipline)
{
$this->discipline = $discipline;
return $this;
}
/**
* Get discipline
*
* #return string
*/
public function getDiscipline()
{
return $this->discipline;
}
/**
* Set notes
*
* #param string $notes
*
* #return Order
*/
public function setNotes($notes)
{
$this->notes = $notes;
return $this;
}
/**
* Get notes
*
* #return string
*/
public function getNotes()
{
return $this->notes;
}
/**
* Set file
*
* #param string $file
*
* #return Order
*/
public function setFile($file)
{
$this->file = $file;
return $this;
}
/**
* Get file
*
* #return string
*/
public function getFile()
{
return $this->file;
}
/**
* Set status
*
* #param integer $status
*
* #return Order
*/
public function setStatus($status)
{
$this->status = $status;
return $this;
}
/**
* Get status
*
* #return integer
*/
public function getStatus()
{
return $this->status;
}
/**
* Set cost
*
* #param integer $cost
*
* #return Order
*/
public function setCost($cost)
{
$this->cost = $cost;
return $this;
}
/**
* Get cost
*
* #return \cost
*/
public function getCost()
{
return $this->cost;
}
/**
* Set site
*
* #param string $site
*
* #return Order
*/
public function setSite($site)
{
$this->site = $site;
return $this;
}
/**
* Get site
*
* #return string
*/
public function getSite()
{
return $this->site;
}
}