Doctrine parent, child relationship hydration - php

Question

I am having a problem and I am afraid I am missing something stupid. But I am struggling with searching for a similar problem to see what I am missing.
Anyway, I have a product entity:
<?php
class Product {
private $productid;
private $name;
/**
* #ORM\ManyToOne(targetEntity="MyNamespace\CategoryBundle\Entity\Category")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="categoryid", referencedColumnName="categoryid")
* })
*/
private $category;
public function getCategoryPath()
{
$category = $this->category;
$items = array($category);
var_dump($category->getParent());
while (null !== $category->getParent()) {
$category = $category->getParent();
$items[] = $category;
}
return $items;
}
}
class Category {
private $categoryid;
private $name;
/**
* #var \Category
*
* #ORM\ManyToOne(targetEntity="MyNamespace\CategoryBundle\Entity\Category")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="parentid", referencedColumnName="categoryid")
* })
*/
private $parent;
public function getParent()
{
return $this->parent;
}
}
?>
And I try:
<?php
$product = $entityManager->find('MyNamespaceProductBundle:Product', 10);
$categories = $product->getCategoryPath();
?>
The problem is, that the categories array only contains the directly linked category. It doesn't seem that doctrine fetches the parent ones so $category->getParent() will always return null and if I look to the mysql-general log I don't see a query raised for the parent category.
What am I doing wrong?

Answer 1

My guess is that you should call the getCategoryPath() method inside the Category class like getCategoryid() and just return the categoryid value. Then:
<?php
$product = $entityManager->find( 'MyNamespaceProductBundle:Product', 10 );
$category = $product->getCategoryid();
$categoryProducts = $entityManager->find( 'MyNamespaceCategoryBundle:Product',array( 'categoryid' => '$category' ) );
?>