Hi,

I create a new module to add new fields to class stock_picking_out. I can choose my new field but don't save this information. Anyone knows why?

My code:

class stock_picking_out(osv.osv):
    _name = "stock.picking.out"
    _inherit = "stock.picking.out"
    _description = "Delivery Orders"

 _columns = {
        'movement_status': fields.selection(
            ....................
      ),

}
    _defaults = {
        'movement_status': 'N',
    }

stock_picking_out()

But when save:

I don't know why this information disappear.

Thanks...