我有横断和购买收藏，其中包含横断和购买详细信息，现在我想将其转换为单个收藏。基于transectionid我们需要合并文档下面是我的横断面采集数据{"transectionid":"1","transectionamount":"2000","transectiondate":"2016-07-1219:22:28",},{"transectionid":"2","transectionamount":"1000","transectiondate":"2016-07-1220:17:11",}以下是我的购买收集数据{"purchaseid":"1","transectionid":"

我有横断和购买收藏，其中包含横断和购买详细信息，现在我想将其转换为单个收藏。基于transectionid我们需要合并文档下面是我的横断面采集数据{"transectionid":"1","transectionamount":"2000","transectiondate":"2016-07-1219:22:28",},{"transectionid":"2","transectionamount":"1000","transectiondate":"2016-07-1220:17:11",}以下是我的购买收集数据{"purchaseid":"1","transectionid":"