How do I get the objectID after I save an object in Mongoose?

var n = new Chat();
n.name = "chat room";
n.save(function(){
    //console.log(THE OBJECT ID that I just saved);
});

I want to console.log the object id of the object I just saved. How do I do that in Mongoose?

Solution 1:

This just worked for me:

var mongoose = require('mongoose'),
      Schema = mongoose.Schema;

mongoose.connect('mongodb://localhost/lol', function(err) {
    if (err) { console.log(err) }
});

var ChatSchema = new Schema({
    name: String
});

mongoose.model('Chat', ChatSchema);

var Chat = mongoose.model('Chat');

var n = new Chat();
n.name = "chat room";
n.save(function(err,room) {
   console.log(room.id);
});

$ node test.js
4e3444818cde747f02000001
$

I'm on mongoose 1.7.2 and this works just fine, just ran it again to be sure.

Solution 2:

Mongo sends the complete document as a callbackobject so you can simply get it from there only.

for example

n.save(function(err,room){
  var newRoomId = room._id;
  });

Solution 3:

You can manually generate the _id then you don't have to worry about pulling it back out later.

var mongoose = require('mongoose');
var myId = mongoose.Types.ObjectId();

// then set it manually when you create your object

_id: myId

// then use the variable wherever