mongoose 怎么 populate 别的集合的子文档?

[gancl]

https://gist.github.com/gclsoft/cb09057a27410bf0870c
I can't find it with populate, o.B is a objectId,o.B.name is undefined.

BSchema is a subdocument of ASchema, CSchema has a ref connection of BSchema.

I want to find all CSchema which CSchema's name is "c_xxx", and shows CSchema's B's name and its A's name.

Like this result: {CName:"c_xxx",BName:"b_xxx",AName:"a_xxx"}

[shuson]

when populate fields, it only works if there is ref to children from the parent schema

[gancl]

@shuson 看来这种情况用不了populate,只能手动一条条查了.
怎么等待CSchema.find({ 执行完毕? 我再手动将结果构造成json