fix product cart log

go/gopath/src/fohow.com/apps/models/order_model/order.go

@@ -177,7 +177,7 @@ func GetOrderById(oId string, useCache bool) (order *Order) {
 	if item != nil && len(item.ExpressOrderNo) > 0 {
 		beego.BeeLogger.Warn("order.ExpressOrderNo =[%v]", order.ExpressOrderNo)
 
-		item.Sign = GenExpressPassword(order.ExpressOrderNo)
+		item.Sign = GenExpressPassword(item.ExpressOrderNo)
 		item.CTime = item.CreatedAt.Unix()
 		item.DTime = item.DispatchTime.Unix()
 	}