Doctrine mapping with Symfony 2 for foreign key - symfony

Question

I am currently facing one problem with mapping I hope some one would helpe me.
I have two table describe bellow..
unitid(primary_key, column_1)
For example data here
unitid(1,22)
unitid (2,33)
mappaths(primary key, forign_key (column_1), forign_key(column_1))
For example data here
mappaths (1,22,33)
mappaths (2,33,22)
unitid has some kind of units defines while this mappaths table define the specific paths based on the unitid
Now when I run the doctrain2 mapping It give me some kind these entities pluse these following mapping information
Entity class
<?php
namespace ApiMaps\ApiMapBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Mappaths
*
* #ORM\Table(name="mappaths", indexes={#ORM\Index(name="idx_45b7519fa3995845", columns={"ref_unitids1"}), #ORM\Index(name="idx_45b7519f3a9009ff", columns={"ref_unitids2"})})
* #ORM\Entity
*/
class Mappaths
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="SEQUENCE")
* #ORM\SequenceGenerator(sequenceName="mappaths_id_seq", allocationSize=1, initialValue=1)
*/
private $id;
/**
* #var integer
*
* #ORM\Column(name="normalvalue", type="smallint", nullable=true)
*/
private $normalvalue;
/**
*
* #var \Unitids
* #ORM\ManyToOne(targetEntity="Unitids",cascade={"all"},fetch="LAZY")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="ref_unitids2", referencedColumnName="databaseid")
* })
*/
private $refUnitids2;
/**
* #var \Unitids
* #ORM\ManyToOne(targetEntity="Unitids",cascade={"all"},fetch="LAZY")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="ref_unitids1", referencedColumnName="databaseid")
* })
*/
private $refUnitids1;
/**
* Set normalvalue
*
* #param integer $normalvalue
*
* #return Mappaths
*/
public function setNormalvalue($normalvalue)
{
$this->normalvalue = $normalvalue;
return $this;
}
/**
* Get normalvalue
*
* #return integer
*/
public function getNormalvalue()
{
return $this->normalvalue;
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set refUnitids1
*
* #param \ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids1
*
* #return Mappaths
*/
public function setRefUnitids1(\ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids1 = null)
{
$this->refUnitids1 = $refUnitids1;
return $this;
}
/**
* Get refUnitids1
*
* #return \ApiMaps\ApiMapBundle\Entity\Unitids
*/
public function getRefUnitids1()
{
return $this->refUnitids1;
}
/**
* Set refUnitids2
*
* #param \ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids2
*
* #return Mappaths
*/
public function setRefUnitids2(\ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids2 = null)
{
$this->refUnitids2 = $refUnitids2;
return $this;
}
/**
* Get refUnitids2
*
* #return \ApiMaps\ApiMapBundle\Entity\Unitids
*/
public function getRefUnitids2()
{
return $this->refUnitids2;
}
}
and mappaths.php
<?php
namespace ApiMaps\ApiMapBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Mappaths
*
* #ORM\Table(name="mappaths", indexes={#ORM\Index(name="idx_45b7519fa3995845", columns={"ref_unitids1"}), #ORM\Index(name="idx_45b7519f3a9009ff", columns={"ref_unitids2"})})
* #ORM\Entity
*/
class Mappaths
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="SEQUENCE")
* #ORM\SequenceGenerator(sequenceName="mappaths_id_seq", allocationSize=1, initialValue=1)
*/
private $id;
/**
* #var integer
*
* #ORM\Column(name="normalvalue", type="smallint", nullable=true)
*/
private $normalvalue;
/**
*
* #var \Unitids
* #ORM\ManyToOne(targetEntity="Unitids",cascade={"all"},fetch="LAZY")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="ref_unitids2", referencedColumnName="databaseid")
* })
*/
private $refUnitids2;
/**
* #var \Unitids
* #ORM\ManyToOne(targetEntity="Unitids",cascade={"all"},fetch="LAZY")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="ref_unitids1", referencedColumnName="databaseid")
* })
*/
private $refUnitids1;
/**
* Set normalvalue
*
* #param integer $normalvalue
*
* #return Mappaths
*/
public function setNormalvalue($normalvalue)
{
$this->normalvalue = $normalvalue;
return $this;
}
/**
* Get normalvalue
*
* #return integer
*/
public function getNormalvalue()
{
return $this->normalvalue;
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set refUnitids1
*
* #param \ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids1
*
* #return Mappaths
*/
public function setRefUnitids1(\ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids1 = null)
{
$this->refUnitids1 = $refUnitids1;
return $this;
}
/**
* Get refUnitids1
*
* #return \ApiMaps\ApiMapBundle\Entity\Unitids
*/
public function getRefUnitids1()
{
return $this->refUnitids1;
}
/**
* Set refUnitids2
*
* #param \ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids2
*
* #return Mappaths
*/
public function setRefUnitids2(\ApiMaps\ApiMapBundle\Entity\Unitids $refUnitids2 = null)
{
$this->refUnitids2 = $refUnitids2;
return $this;
}
/**
* Get refUnitids2
*
* #return \ApiMaps\ApiMapBundle\Entity\Unitids
*/
public function getRefUnitids2()
{
return $this->refUnitids2;
}
}
now when I run the project it give me the following error
37. public static function missingPrimaryKeyValue($className, $idField)
38. {
39. return new self(sprintf("Missing value for primary key %s on %s", $idField, $className));
40. }
41. }
It seems to me that this primary key of unitsid could not get by mapping
Any solution would be appreciated

Answer 1

First I think you haven't understand the ORM (object relational mapping) concept in your entities you don't map these relations by foreign keys, doctrine will do it for you, in the entities layer you have to map objects and only objects
Second you need to map your entities relations by using orm annotations or xml configuration to describe those relations if they are oneToOne or ManyToOne or OneToMany or ManyToMany relation
Third You are having this error because you haven't set a value to the entity id, to do that you have two options : auto generate the id or set it manually before persisting object
see this