mongooseaggregate

Mongodb 聚合工具 Aggregate Framework 。 管道 pipeline 操作符號。 ~ 聚合 (aggregate) 是啥?有啥用? ~. 在前面 ...

Aggregate constructor used for building aggregation pipelines. Do not instantiate this class directly, use Model.aggregate() instead.

Aggregation operations process multiple documents and return computed results. You can use aggregation operations to: Group values from multiple documents ...

2020年5月18日 — Mongoose's aggregate() function returns an instance of Mongoose's Aggregate class. Aggregate instances are thenable, so you can use them with ...

mongosh Method · A cursor for the documents produced by the final stage of the aggregation pipeline. · If the pipeline includes the explain option, the query ...

Master the MongoDB aggregation pipeline. Follow along with query examples using the most important aggregation stages, and test your skills!

2021年8月29日 — 盡可能將match放到pipeline越前面的階段越好，因為match會限制通過pipeline的document總數，相對於放到後面的階段，可以降低處理次數。

Aggregate constructor used for building aggregation pipelines. Do not instantiate this class directly, use Model.aggregate() instead.

See: $sort. Appends a new $sort operator to this aggregate pipeline. If an object is passed, values allowed are asc , desc , ascending , descending , 1 , and -1 ...

2021年10月3日 — 簡單來說，Mongoose 是基於node.js 的Object Data Modeling (ODM)，讓我們可以優雅的操作MongoDB 中的資料。