<?php

use Doctrine\Common\Util\Debug;

require 'init.php';

// Create a parent group (id 1) and a child group (id 2)
$group1 = new \Entities\Group;
$group2 = new \Entities\Group;
$group2->parent = $group1;
$group1->children->add($group2);
$em->persist($group1);
$em->flush();

$em->clear();

$group3 = $em->find('Entities\Group', $group2->id); // Load child group first (id 2)
$group4 = $em->find('Entities\Group', $group1->id); // Load parent group (id 1)
// $group3 (id 2) should be a child of (id 1)
foreach ($group4->children as $child) { }