未处理拒绝MongoError：CMD_NOT_ALLOWED：MapReduce的

Question

我想要使用的MapReduce方法在自由Mongodb-atlas-cloud计划，但我得到这个错误

at emitOne (events.js:96:13) 
at TLSSocket.emit (events.js:188:7) 
at readableAddChunk (_stream_readable.js:176:18) 
at TLSSocket.Readable.push (_stream_readable.js:134:10) 
at TLSWrap.onread (net.js:547:20) 
Unhandled rejection MongoError: CMD_NOT_ALLOWED: mapreduce 
at Function.MongoError.create ... 

注：我可以写，没有任何问题

Answer 1

阅读MongoDB云服务支持

Mapreduce is not allowed in free tier at this moment. https://docs.atlas.mongodb.com/unsupported-commands/