This method helps you to sort your entity request in an Symfony2 entity!

AnyEntity.php

/**
* This method helps you to sort your entity request in an Symfony2 entity!
*
* Please, share your tips commenting here:
* https://gist.github.com/5038457
*
* Author: @dbeuchler
*
* (Tested and used with doctrine 2.x and Symfony 2.0.x, 2.1.x)
*/

public function getProductsSortedByPositionInGroup()
{
    $arr = $this->product->toArray();
    usort($arr, function($a, $b) {
        if ($a->getPositionInGroup() > $b->getPositionInGroup()) {
            return 1;
        }
    });
    	
    return $arr;
}