Doctrine 2 - ManyToOne association not working - symfony

Question

I need a hand with the following code.
I have this two clases:
Class Expert{
/**
* #var integer
*
* #ORM\Id
* #ORM\Column(name="id", type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(name="username", type="string", length=255)
* #Assert\NotBlank()
*/
protected $username;
/**
* #ORM\Column(name="email", type="string", length=255, unique=true)
* #Assert\NotBlank()
*/
protected $email;
/**
* #ORM\Column(name="password", type="string", length=40)
* #Assert\NotBlank()
*/
protected $password;
}
Class Job{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(name="titulo", type="string", length=255)
* #Assert\NotBlank()
*/
protected $title;
/**
* #ORM\Column(name="description", type="text")
* #Assert\NotBlank()
*/
protected $description;
/**
* #ORM\ManyToOne(targetEntity="Expert")
* #ORM\JoinColumn(name="expert_id", referencedColumnName="id")
*/
protected $assigned_expert;
}
And this custom Repository:
class JobRepository extends EntityRepository
{
public function getTechnicianFinishedJobs($id)
{
$Q = $this->getQueryBuilder('j')
->where('j.expert = :expert_id')
->setParameter('expert_id', $id)
->getQuery()
try{
return $q->getResult();
}catch(NoResultException $e){
return false;
}
}
}
When I run this I get the following error:
[Semantical Error] line 0, col 68 near 'expert = :e': Error: Class Job has no field or association named expert
The idea is that one expert can be assigned to many jobs and one job can be assigned to one expert . The job needs to know who's the designated expert but not the other way around, so that's why I use a ManyToOne unidirectional association.
I tried changing the repository to ->where('j.expert_id = :expert_id') and other combinations with no avail.
Can somebody tell me what I'm doing wrong?
Thanks in advance.

Answer 1

If 'j' is your job table, you can't use j.expert, because this is (as far as I can tell) no attribute of your table/entity. You named the field 'expert_id'.
I guess it should be:
$Q = $this->getQueryBuilder('j')
->where('j.assigned_expert = :expert_id')
->setParameter('expert_id', $id)
->getQuery()
#alvk4: He explained why he didn't use bidirectional association. What you suggested, forgive me if I'm wrong, is bidirectional association.

Answer 2

You miss something on your annotation see an working example:
/**
* Fluency\Bundle\DesktopBundle\Entity\Application
*
* #ORM\Table(
* name="desktop.applications",
* uniqueConstraints={
* #ORM\UniqueConstraint(name="applications_jsid_key", columns={"jsid"}),
* #ORM\UniqueConstraint(name="applications_type_key", columns={"type"}),
* #ORM\UniqueConstraint(name="applications_classname_key", columns={"classname"})
* }
* )
* #ORM\Entity(repositoryClass="Fluency\Bundle\DesktopBundle\Entity\Repository\ApplicationRepository")
*/
class Application
{
...
/**
* #var ArrayCollection
*
* #ORM\OneToMany(targetEntity="Fluency\Bundle\DesktopBundle\Entity\ApplicationFile", mappedBy="application", cascade={"persist"})
* #ORM\JoinTable(name="desktop.application_files",
* joinColumns={
* #ORM\JoinColumn(name="idapplication", referencedColumnName="idapplication")
* }
* )
*/
private $files;
...
}
/**
* Fluency\Bundle\DesktopBundle\Entity\ApplicationFile
*
* #ORM\Table(name="desktop.application_files")
* #ORM\Entity
*/
class ApplicationFile
{
...
/**
* #var \Fluency\Bundle\DesktopBundle\Entity\Application
*
* #ORM\ManyToOne(targetEntity="Application", inversedBy="files")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="idapplication", referencedColumnName="idapplication", onDelete="CASCADE")
* })
*/
private $application;
...
}
See a working example of DQL on my repository class:
...
public function getApplicationFilesByJsid($jsid)
{
if(empty($jsid) OR !$jsid OR !is_string($jsid))
{
throw new \Psr\Log\InvalidArgumentException();
}
$query = $this->getEntityManager()->createQueryBuilder()
->select('a, af, m, ft')
->from($this->getEntityName(), 'a')
->innerJoin('a.files', 'af')
->innerJoin('a.module', 'm')
->innerJoin('af.filetype', 'ft')
->where('a.active = 1 AND a.jsid = :jsid')
->setParameter('jsid', $jsid)
->orderBy('af.id', 'ASC')
->getQuery();
$applicationFiles = $query->getSingleResult(\Doctrine\ORM\Query::HYDRATE_ARRAY);
return $applicationFiles;
}
...
#enigma: Yes is bidirectional, but your DQL its'n right, would be j.assigned_expert, but anyway the Expert is owning side of relationship, also he needs set mappedBy=assigned_expert on annotation.