       , {
                        field: 'purchase_time', title: '出售时间', formatter: function (val, item) {
                            if (!item.purchase_time) {
                                return '-';
                            }
                            return item.purchase_time;
                        }
                    }
                    , {
                        field: 'order', title: '订单号', formatter: function (val, item) {
                            if (!item.order) {