Only one product from the selected product pass to the sales order line form. 

What to do to get the whole product selected to the sales order form?

code:

    def create_sale_order(self):      

        return {           

                     'name': 'Create Sale Order',        

         'res_model': 'sale.order',           

                     'type': 'ir.actions.act_window',          

                     'context': {'default_order_line':(0,False,{'product_id':self.product_id.id}) },          

                     'view_type': 'form',

                     'view_mode': 'form',      

                     'views': [(self.env.ref('sale.view_order_form').id, 'form')],            

                     'view_id': self.env.ref('sale.view_order_form').id,            

                     'target': 'current',                }