One-To-Many Relation in Symfony 2 with Doctrine - symfony

Question

I've looked at literally tons of questions/answers on Stack Overflow and other places on the web, but cannot find a resolution to this problem.
Before I explain the problem, I have:
stripped back my entities so that they only have the minimum attributes and methods
have cleared the doctrine query cache / metadata cache
dropped and recreated the schema
checked my spelling
I have the following two entities:
<?php
namespace Docker\ApiBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
*/
class Source
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\Column(type="integer")
* #ORM\ManyToOne(targetEntity="Project",inversedBy="sources")
* #ORM\JoinColumn(referencedColumnName="id")
*/
private $project;
}
<?php
namespace Docker\ApiBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
*/
class Project
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\OneToMany(targetEntity="Source", mappedBy="project")
*/
private $sources;
public function __construct() {
$this->sources = new ArrayCollection();
}
public function getSources() {
return $this->sources;
}
}
So a many 'sources' can belong to one 'project'.
In my controller I have:
$em = $this->getDoctrine()->getManager();
$project = $em->find('Docker\ApiBundle\Entity\Project', 1);
$sources = $project->getSources()->toArray();
I have tried lots of things but I always get:
Notice: Undefined index: project in /.../www/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/BasicEntityPersister.php line 1577
Like I say, I know there are a lot of questions going around about this, but none of the accepted answers fix my problem.
This all looks pretty fundamental to using Doctrine2 so not sure what I am doing wrong - it could be something really obvious.
Any help would be appreciated.

Answer 1

You have:
/**
* #ORM\Column(type="integer")
* #ORM\ManyToOne(targetEntity="Project",inversedBy="sources")
* #ORM\JoinColumn(referencedColumnName="id")
*/
private $project;
Remove:
#ORM\Column(type="integer")
from annotation.

Answer 2

If this is exactly your code, i dont see a namespace in your Project class. Try adding the namespace line "namespace Docker\ApiBundle\Entity;".
If this is the same folder no need for "use" but if it s part of other bundle or folder try putting a line like "use Docker\ApiBundle\Entity\Project;"
in your Source class. I Hope it helps..
Otherwise :
<?php
namespace Azimut\ApiBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
*/
class Source
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
private $name;
/**
* #ORM\Column(type="integer")
* #ORM\ManyToOne(targetEntity="Azimut\ApiBundle\Entity\Project", inversedBy="sources")
* #ORM\JoinColumn(onDelete="CASCADE")
*/
private $project;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set project
*
* #param integer $project
* #return Source
*/
public function setProject($project)
{
$this->project = $project;
return $this;
}
/**
* Get project
*
* #return integer
*/
public function getProject()
{
return $this->project;
}
}
<?php
namespace Azimut\ApiBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* #ORM\Entity
*/
class Project
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\OneToMany(targetEntity="Azimut\ApiBundle\Entity\Source", mappedBy="object", cascade={"all"})
*/
private $sources;
public function __construct() {
$this->sources = new ArrayCollection();
}
public function getSources() {
return $this->sources;
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Add sources
*
* #param \Azimut\ApiBundle\Entity\Source $sources
* #return Project
*/
public function addSource(\Azimut\ApiBundle\Entity\Source $sources)
{
$this->sources[] = $sources;
return $this;
}
/**
* Remove sources
*
* #param \Azimut\ApiBundle\Entity\Source $sources
*/
public function removeSource(\Azimut\ApiBundle\Entity\Source $sources)
{
$this->sources->removeElement($sources);
}
}
and little part of the controller:
public function helloAction()
{
$id = 1;
$em = $this->getDoctrine()->getManager();
$project = $em->getRepository('Azimut\ApiBundle\Entity\Project')->find($id);
$source1 = $em->getRepository('Azimut\ApiBundle\Entity\Source')->find(3);
$source2 = $em->getRepository('Azimut\ApiBundle\Entity\Source')->find(5);
$project->addSource($source1);
$sources = array();
$sources = $project->getSources();
var_dump($sources);
return ....
}
and this works just fine for me.