symfony2 doctrine2 postLoad and single table inheritance - symfony

Question

i have an entity structure with Doctrine 2 Single Table Inheritance like this:
/**
*
* #ORM\Table(name="animal")
* #ORM\InheritanceType("SINGLE_TABLE")
* #ORM\DiscriminatorColumn(name="animaltype", type="integer")
* #ORM\DiscriminatorMap({1 = "Cat", 2 = "Dog"})
*/
class Animal
.
.
.
This is the inherited Entity:
/**
* #ORM\Entity
*/
class Dog extends Animal
Now i would like to do something with the object with the postload Event:
I get the Dog Object from the LifecycleEventArgs Object but just with the attributes from the Dog Entity, at this moment the Listener doesn't know anything about the inherited Attributes from the Animal Entity.
What am i doing wrong? Does anybody know?
Thank you very much.

Answer 1

The attributes are private in your Animal class. I just did something similar, but you need to use the metadata to get the object attributes in your postLoad method.
$MetaData = $em->getClassMetadata(get_class($entity));
You can then get all the field names (properly formatted, without "_") with
foreach (array_keys($MetaData->reflFields) as $value) {
}
In order to use the getters of those fields you can do :
//this will become $entity->getSomeFieldValue()
//it will eval to false if this doesn't exist
if ($entity->{'get' . ucfirst($value)}()) {}
Your whole code will look something like:
//Your listener class
private $reg;
public function __construct(Registry $reg) {
$this->reg = $reg;
}
public function postLoad( LifecycleEventArgs $eventArgs ){
$entity = $eventArgs->getEntity();
$em = $this->reg->getManager();
$MetaData = $em->getClassMetadata(get_class($entity ));
foreach (array_keys($MetaData->reflFields) as $value) {
if ($entity->{'get' . ucfirst($value)}()) {
//here you can get the $entity->someGetter() values
}
}
}
in your service.yml you would do:
arguments: ['#doctrine']
tags:
- { name: doctrine.event_listener, event: postLoad }
Keep in mind that unless you switch your parent class variables to protected instead of private, there is no real way to read them directly. If you need any clarification, let me know, but this method with the metadata worked fine for me. It also gives you associations