/**
* Product::getSpec()
*
* @return list of product spec order by position
*/
function getSpec()
{
$productSpec = new productspec();
$productSpec->where('product_id', $this->id);
$productSpec->order_by('position', 'asc');
$productSpec->include_related("productgenspec", "*", TRUE, TRUE);
$productSpec->get_iterated();
return $productSpec;
}
