MongoDB returning a lot of data - node.js

Question

I am trying to grab all documents from my "chats" collection. When I loop through my results variable and console log item, I get a lot of data back. how can I query all objects and get just the document fields?
//create route
router.get('/', function(req, res) {
db.connect(url, function(err, db){
if(err){
console.log(err);
}else{
console.log("Connected");
}
getAllChats(db, function(data){
console.log(data);
});
});
res.render('index.jade');
});
var getAllChats = function(db, callback){
var collection = db.collection('chats');
var results = collection.find();
results.each(function(err, item) {
// If the item is null then the cursor is exhausted/empty and closed
console.log(item);
if(item == null) {
db.close(); // you may not want to close the DB if you have more code....
return;
}
// otherwise, do something with the item
});
callback(results);
}

Answer 1

You need a projection to achieve this.
https://docs.mongodb.com/manual/tutorial/project-fields-from-query-results/
var collection = db.collection('chats');
var results = collection.find(query, projection);
In your case query will be {};
Projection will be {FieldYouNeed: 1, fieldYouNeed: 1, ...};
Here is example
var results = collection.find({name: "developer"}, {_id: 0, name: 1, email:1});
In this case only name and email will be returned from DB.
Hope this helps.