def action_cancel(self):

        """

        @param self: object pointer

        """

        for rec in self:

            if not rec.order_id:

                raise UserError(_("Order id is not available"))

            for product in rec.room_line_ids.filtered(

                lambda l: l.order_line_id.product_id == product

            ):

                rooms = self.env["hotel.room"].search([("product_id", "=", product.id)])

                rooms.write({"isroom": True, "status": "available"})

            rec.invoice_ids.button_cancel()

            return rec.order_id.action_cancel()


Hello how can I solve this error?