i modified the _cart_update function of website_sale to update the field price_unit of sale.order.line. But if i write to the sale.order.line the functional fields of the sale.order.line like price_subtotal are not updated after write?!?
sol_obj = self.pool.get('sale.order.line')
sol_obj.write(cr, SUPERUSER_ID, [line_id], {'price_unit': 10, }, context=context)