add clear product cache

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

@@ -83,7 +83,7 @@ func GetOrderDetailPackages(productId int64, useCache bool) (list []*ProductItem
 		}
 	}
 	sql := `
-		select item_id,item_title,nums from
+		select product_id,item_id,item_title,nums from
 		product_items
 		where product_id = ? ;
 		`