Virtuemart: Echo order_number on cart/order_done page

Question

Now in the page views/cart/tmpl/order_done.php there is echo $this->html. How can I echo order_number as single record? $this->order_number and $order['details']['BT']->order_number don't work. Thanks

Answer 1

order_done.php

require_once(JPATH_VM_ADMINISTRATOR.DS.'models'.DS.'orders.php');
$order = VirtueMartModelOrders::getOrder($this->cart->virtuemart_order_id);
echo $order['details']['BT']->order_number;