Problem:
When serializing a collection of Doctrine enitities the collection will still have 2 items though the items are empty.
Background:
I have a few entities which extends each other B extends A and C extends B. In the entity Test I have an array with objects of the type B. $test will have the expected values (collection with two items) at the moment of serialization.
$test contains a variable (array) collection one of the items in the array is of the type B and one of type C.
$sTest will get the collection of two items though the items are empty.
This is how the string in $sTest lookslike after the serialization of $test "{"collection":[[],[]]}"
Test script:
$test = new Test();
$b = new B();
$b->setToken('asdf');
$b->setName('asdf');
$c = new C();
$c->setToken('asdf');
$c->setName('asdf');
$c->setDescription('asdf');
$test->addCollection($b);
$test->addCollection($c);
//Serialize
$serializer = $this->container->get('serializer');
$sTest = $serializer->serialize($test, 'json');
//Deserialize
$deserializer = $this->container->get('serializer');
$dTest = $deserializer->deserialize($sTest, 'Acme\DemoBundle\Entity\Test', 'json');
$em = $this->getDoctrine()->getManager();
$em->merge($dTest);
$em->flush();
A:
<?php
namespace Acme\DemoBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use JMS\Serializer\Annotation as JMS;
/**
* @ORM\Entity
* @ORM\InheritanceType("JOINED")
* @ORM\DiscriminatorColumn(name="discr", type="string")
* @ORM\DiscriminatorMap({"a" = "Acme\DemoBundle\Entity\A", "b" = "Acme\DemoBundle\Entity\B", "c" = "Acme\DemoBundle\Entity\C"})
*
* @JMS\ExclusionPolicy("None")
* @JMS\Discriminator(field = "type", map = {
* "a": "Acme\DemoBundle\Entity\A",
* "b": "Acme\DemoBundle\Entity\B",
* "c": "Acme\DemoBundle\Entity\C", *
* })
*/
class A {
/**
* @ORM\Column(type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @ORM\Column(type="string", length=100)
*/
protected $token;
public function setToken($token){
$this->token = $token;
}
/**
* @JMS\VirtualProperty
* @JMS\SerializedName("type")
*/
public function getDiscr()
{
return 'a';
}
}
B:
<?php
namespace Acme\DemoBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use JMS\Serializer\Annotation as JMS;
/**
* @ORM\Entity
* @JMS\ExclusionPolicy("None")
*/
class B extends A {
/**
* @ORM\Column(type="string", length=100)
*/
protected $name;
/**
* @ORM\ManyToOne(targetEntity="Acme\DemoBundle\Entity\Test", inversedBy="collection")
* @ORM\JoinColumn(name="TestId", referencedColumnName="id")
*/
private $test;
public function setName($name) {
$this->name = $name;
}
/**
* @JMS\VirtualProperty
* @JMS\SerializedName("type")
*/
public function getDiscr() {
return 'b';
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set token
*
* @param string $token
* @return B
*/
public function setToken($token)
{
$this->token = $token;
return $this;
}
/**
* Get token
*
* @return string
*/
public function getToken()
{
return $this->token;
}
/**
* Set test
*
* @param \Acme\DemoBundle\Entity\Test $test
* @return B
*/
public function setTest(\Acme\DemoBundle\Entity\Test $test = null)
{
$this->test = $test;
return $this;
}
/**
* Get test
*
* @return \Acme\DemoBundle\Entity\Test
*/
public function getTest()
{
return $this->test;
}
}
C:
<?php
namespace Acme\DemoBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use JMS\Serializer\Annotation as JMS;
/**
* @ORM\Entity
* @JMS\ExclusionPolicy("None")
*/
class C extends B {
/**
* @ORM\Column(type="text")
*/
protected $description;
public function setDescription($description) {
$this->description = $description;
}
/**
* @JMS\VirtualProperty
* @JMS\SerializedName("type")
*/
public function getDiscr() {
return 'c';
}
}
Test:
<?php
namespace Acme\DemoBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use JMS\Serializer\Annotation as JMS;
/**
* @ORM\Entity
*/
class Test {
/**
* @ORM\Column(type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @ORM\OneToMany(targetEntity="Acme\DemoBundle\Entity\B", mappedBy="test", cascade={"all"})
* @JMS\Type("ArrayCollection<'Acme\DemoBundle\Entity\B'>")
*/
private $collection;
/**
* Constructor
*/
public function __construct()
{
$this->collection = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Add collection
*
* @param \Acme\DemoBundle\Entity\B $collection
* @return Test
*/
public function addCollection(\Acme\DemoBundle\Entity\B $collection)
{
$this->collection[] = $collection;
return $this;
}
/**
* Remove collection
*
* @param \Acme\DemoBundle\Entity\B $collection
*/
public function removeCollection(\Acme\DemoBundle\Entity\B $collection)
{
$this->collection->removeElement($collection);
}
/**
* Get collection
*
* @return \Doctrine\Common\Collections\Collection
*/
public function getCollection()
{
return $this->collection;
}
}
