组(按猫鼬)? [英] Group (By) in Mongoose?

问题描述

我已经在shell中构造了我想要的查询，但是用Mongoose编写查询时遇到了麻烦.

I've constructed the query I want in the shell but am having trouble writing it in Mongoose.

db.commentstreams.group({ key: { page_id: true }, reduce: function(obj,prev) { prev.num_comments += obj.num_comments }, initial: { num_comments: 0 } })

我对Mongoose语法有点困惑；也许有人可以对此有所了解.非常感谢.

I'm a bit confused by the Mongoose syntax; perhaps someone could shed some light on this one. Much thanks.

推荐答案

根据不幸的是，我们似乎缺少此文件的文档.

Unfortunately we seem to be lacking documentation for this one.

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