Querying Join Table in Doctrine - symfony

Question

I have the following two classes which are have a ManyToMany relationship and saved in a joining table called countries_involved.
class CountriesInvolved
{
/**
* #var integer
*/
private $id;
/**
* #var string
*/
private $description;
/**
* #var \DateTime
*/
private $createdAt;
/**
* #var \DateTime
*/
private $updatedAt;
/**
* #var \ACME\SouthBundle\Entity\Country
*/
private $country;
/**
* #var \Doctrine\Common\Collections\Collection
*/
private $involvement;
}
and
class Involvement
{
/**
* #var integer
*/
private $id;
/**
* #var string
*/
private $name;
/**
* #var string
*/
private $description;
}
The relationship is defined as below in YML
manyToMany:
involvement:
targetEntity: Involvement
joinTable:
name: countries_involvement
joinColumns:
case_country_involved_id:
referencedColumnName: id
inverseJoinColumns:
involvement_id:
referencedColumnName: id
I'm trying to return results of countries involved based on the id of an involvement but kind of stuck in writing the query without getting an error. Here's what I tried thus far:
$em = $this->getDoctrine()->getManager()->createQueryBuilder();
$q = $em->select('c')
->from('ACMESouthBundle:CountriesInvolved','c')
->innerJOIN('c.Involvement','i')
->where('i.id = 1')
->groupBy('c.country')->getQuery();
The error is:
[Semantical Error] line 0, col 80 near 'i WHERE i.id': Error: Class ACME\SouthBundle\Entity\CountriesInvolved has no association named Involvement

Answer 1

Firstly, I would recommend the use of annotations, your code will be more readable.
The problem I think is that you have forgotten inversedBy and mappedBy properties.
The following code is a possible solution to your problem using annotations.
You should add this code to Involvement entity:
/**
* #ORM\ManyToMany(targetEntity="CountriesInvolved", inversedBy="involvement")
* #ORM\JoinTable(name="countries_involvement",
* joinColumns={#ORM\JoinColumn(name="case_country_involved_id", referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="involvement_id", referencedColumnName="id")}
* )
*/
private $countries;
and in CountriesInvolved entity you should add the following annotations in $involvement:
/**
* #ORM\ManyToMany(targetEntity="Involvement", mappedBy="countries")
*/
private $involvement;
I have just rewrite the query, something like this:
$em = $this->getEntityManager();
$query = $em->createQuery('
SELECT c
FROM ACMESouthBundle:CountriesInvolved c
JOIN c.involvement i
WHERE i.id = :id
');
$query->setParameter('id', '1');
return $query->getResult();
EDIT
This is with YAML method:
CountriesInvolved:
manyToMany:
involvement:
targetEntity: Involvement
mappedBy: countries
CountriesInvolved:
manyToMany:
countries:
targetEntity: CountriesInvolved
inversedBy: involvement
joinTable:
name: countries_involvement
joinColumns:
case_country_involved_id:
referencedColumnName: id
inverseJoinColumns:
involvement_id:
referencedColumnName: id