1. Write some mini applications with node recently. Using mongoose. There is a small problem. Do not understand (may not understand the English document or do not understand).
for example:
video.find({},(err, videos) => {
videos.forEach(val => {
val.videoId = val._id;
delete val.id;
})
})
find a normal method. Or can you tell me where it is in the document? I really don"t understand how to do it.
video.find ({},'- id',function (err,doc) {})
the second parameter is a string, add-do not return id, do not add-only return id, multiple fields
http://mongoosejs.com/docs/ap.
I wonder if this article can solve the problem of the landlord.
video.aggregate (). Project ({videoId: "$_ id"}). Exec ();
so OK
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