Fatal error (Order -> conversion_rate is empty) in prestashop 1.4

[tarek.fellah]

I would like to add dropdown option to let user select the store in which he can get his produt in the carrier selection page, i added a module for that, also i added a field in the order class, and the orders table, when i tried to save the order in ParentOrderController.php,it is the right place to do that? i get an error: Order->conversion_rate is empty

 

this is my code

$order = new Order((int)($this->id_order));
$order->magasin = (string)Tools::getValue('listmagasins');
$order->save();

I tried to store the $order->magasin in a file to retrieve its content, and it gives me what i expect. The problem whith

$order->save(); i think that this statement is used to store the order in the database specially the magasin variable.

Thanks in advance.

Edited May 14, 2014 by tarek.fellah (see edit history)

[tarek.fellah]

Up!