projection not working with db.collection.find in mongo [duplicate]

Question

I have started to use mongodb just a day back and have encountered an issue. I searched on net and stackoverflow for how to hide _id value in final answer and following the answers provided I tried to get my code run but still the _id part shows.

P.S.: I am using cloud9 as the ide.

var mongo = require('mongodb').MongoClient; mongo.connect('mongodb://localhost:27017/learnyoumongo', function(err, database) {         if(err) throw err;         const db = database.db('learnyoumongo');         var parrots = db.collection('parrots');         parrots.find({             age: { $gt: +process.argv[2] }         },{             name: 1,             age: 1,             _id: 0         }).toArray(function(err, docs){             if(err) throw err;             console.log(docs);             database.close();         }); }); 

Answer 1

you could separate projection like this:

    parrots.find({         age: { $gt: +process.argv[2] }     }).project({_id:0}).toArray(function(err, docs){         if(err) throw err;         console.log(docs);         database.close();     }); 

i had the same issue with being unable to get projection to work, and the above method worked for me