symfony2 createQueryBuilder - symfony

Question

I am trying to make a really simple sql query from repository class, just select * from Adjudicacion where cursoAcademico_id=$cursoAcademicoActual;:
This is my entity:
/**
* Adjudicacion
*
* #ORM\Table(name="Adjudicacion")
* #ORM\Entity(repositoryClass="Administrador\AdjudicacionBundle\Entity\AdjudicacionRepository")
*/
class Adjudicacion {
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var \DateTime
*
* #ORM\Column(name="fechaInicio", type="date")
*/
private $fechaInicio;
/**
* #var \DateTime
*
* #ORM\Column(name="fechaFinal", type="date")
*/
private $fechaFinal;
/**
* #ORM\ManyToOne(targetEntity="Administrador\CursoAcademicoBundle\Entity\CursoAcademico")
*/
private $cursoAcademico;
/**
* #ORM\ManyToOne(targetEntity="Administrador\AdjudicacionClaseBundle\Entity\AdjudicacionClase")
*/
private $adjudicacionClase;
/**
* #ORM\ManyToOne(targetEntity="Administrador\AdjudicacionNumeroBundle\Entity\AdjudicacionNumero")
*/
private $adjudicacionNumero;
/**
* #ORM\ManyToOne(targetEntity="Administrador\AdjudicacionTipoBundle\Entity\AdjudicacionTipo")
*/
private $adjudicacionTipo;
...getters and setters...
This is my repository class:
class AdjudicacionRepository extends EntityRepository {
public function findAdjudicacionesActuales($cursoAcademicoActual) {
$q=$this->createQueryBuilder('c')
->where('c.cursoAcademico_id = :cursoAcademico_id')
->setParameter('cursoAcademico_id', $cursoAcademicoActual)
->getQuery()->getResult();
return $q;
}
}
But it doesnt work, the screen is just blank and I dont get any result. I tried with criteria too, like this:
public function findAdjudicacionesActuales2($cursoAcademicoActual) {
$expr = Criteria::expr();
$criteria = Criteria::create();
$criteria->where($expr->eq("cursoAcademico_id", $cursoAcademicoActual));
return $this->matching($criteria);
}
and i get: Unrecognized field: cursoAcademico_id
This is in the database:
mysql> select * from Adjudicacion;
+----+-------------+------------+-------------------+----------------------+-----------------------+---------------------+
| id | fechaInicio | fechaFinal | cursoAcademico_id | adjudicacionClase_id | adjudicacionNumero_id | adjudicacionTipo_id |
+----+-------------+------------+-------------------+----------------------+-----------------------+---------------------+
| 2 | 2009-01-01 | 2009-01-01 | 7 | 3 | 4 | 3 |
| 6 | 2009-01-01 | 2009-01-01 | 7 | 3 | 4 | 4 |
| 7 | 2009-01-01 | 2009-01-01 | 7 | 3 | 5 | 3 |
| 8 | 2009-01-01 | 2009-01-01 | 7 | 3 | 5 | 4 |
+----+-------------+------------+-------------------+----------------------+-----------------------+---------------------+
what is wrong?

Answer 1

Technically in the eyes of Doctrine ORM the cursoAcademico_id field doesn't exist. It is used to create a link between the 2 tables to create the object but you can't use it in anything.
To do a search for an object with the given id you should use a join and match the id of the joined object like..
$q=$this->createQueryBuilder('a')
// Create builder in 'Adjudicacion' repository so 'a' rather than 'c'
->join('a.cursoAcademico', 'c')
// Join 'Adjudicacion' to 'CursoAcademico'
->where('c.id = :cursoAcademico_id')
// match id of joined `CursoAcademico`
->setParameter('cursoAcademico_id', $cursoAcademicoActual)
->getQuery()->getResult();
return $q;