Second parameter to limit fields in find() not working in Mongodb

Question

Mongodb Database view

I want to omit the _id field in my result

MongoClient.connect(\"mongodb://localhost:27017/\",function(err,client)         


        

Answer 1

In version 3.4.9 of the mongodb you can simply achieve this by:

db.getCollection('data').find({}, { _id: 0 })

Answer 2

This should work. Using the boolean "false".

MongoClient.connect("mongodb://localhost:27017/",function(err,client){ var db = client.db("customerDetails"); db.collection("customerName").find({},{ _id : false}).toArray(function(error,result){ console.log(result); client.close(); }); });

Answer 3

In version 3.0 of the mongodb driver, the second parameter to find() is the options object, not the projection document. See the documentation here. To send a projection document, set the projection property of the options document. E.g.

db.collection("customerName").find({}, { projection: { _id: 0 } })

Alternatively, use the project method:

db.collection("customerName").find({}).project({ _id: 0 })

In version 2.2 of the mongodb driver, the second argument of find was indeed the projection document. This has changed in the latest version (3.0). So some blog posts might not be up to date. See the relevant section of the 3.0 changelog here.