Symfony2 doctrine ManyToMany associations mapping invalid? - symfony

Question

I have two entities relating to this issue, and I want a join table to be able to cross reference values in each table.
Here is an explanation:
Entity ContainerType.php:
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use AppBundle\Entity\Containers;
/**
* ContainerType
*
* #ORM\Table(name="container_type")
* #ORM\Entity
* #ORM\HasLifecycleCallbacks()
*/
class ContainerType
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="type", type="string", length=255)
*/
private $type;
/**
* #var \DateTime
*
* #ORM\Column(name="date_added", type="datetime")
*/
private $dateAdded;
/**
* #var \DateTime
*
* #ORM\Column(name="date_modified", type="datetime", nullable=true)
*/
private $dateModified;
/**
* #ORM\ManyToMany(targetEntity="Containers", inversedBy="type")
* #ORM\JoinTable(name="container_type_containers")
**/
private $container;
public function __construct()
{
$this->container = new ArrayCollection();
}
And entity Containers.php:
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use AppBundle\Entity\ContainerType;
/**
* Containers
*
* #ORM\Table(name="containers")
* #ORM\Entity
*/
class Containers
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="number", type="string", length=255)
*/
private $number;
/**
* #ORM\ManyToMany(targetEntity="Containers", mappedBy="container")
*/
private $type;
public function __construct()
{
$this->type = new ArrayCollection();
}
And although the schema update works without problems, when I do a doctrine:schema:validate I get the following fail:
[Mapping] FAIL - The entity-class 'AppBundle\Entity\Containers' mapping is invalid:
* The association AppBundle\Entity\Containers#type refers to the owning side field AppBundle\Entity\Containers#container which does not exist.
But the $container field DOES exist in ContainerType so I do not understand why it's trying to reference a field called container in the Containers entity?
Can anyone shed any light on this?
Thank you
Michael

Answer 1

I think this code should works fine for you :)
ContainerType.php
/**
* #ORM\ManyToMany(targetEntity="Containers", inversedBy="containersType")
* #ORM\JoinTable(name="container_type_containers",
* joinColumns={#ORM\JoinColumn(name="container_id", referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="container_type_id", referencedColumnName="id")})
*/
protected $containers;
Containers.php
/**
* #ORM\ManyToMany(targetEntity="ContainerType", mappedBy="containers")
*/
protected $containersType;

Answer 2

I have just realized my error!
I had used the wrong target Entity in the Containers.php file, I should have used ContainerType as the target, instead I had Containers which is why it was trying to find the field in the wrong table!