Mongoose: mpromise (mongoose's default promise library) is deprecated

Question

I am using popular fix from Internet, but it still ain't working... here is my code:

var Lobby = require('../models/lobbies-model');
var mongoose = require('mongoose');

mongoose.Promise = require('bluebird');
mongoose.connect('localhost:27017/mydb');
var lobbies = [
    new Lobby({
        nickname: 'Nickname1',
        status: "Status1",
    }),
    new Lobby({
        nickname: 'Nickname2',
        status: "Status2",
    })
];

var done = 0;
for (var i = 0; i < lobbies.length; i++) {
    lobbies[i].save(function(err, result) {
        done++;
        console.log(result);
        if (done === lobbies.length) {
            exit();
        }
    });
}

function exit() {
    mongoose.disconnect();
}

And have an error in my console and my result...

(node:1108) DeprecationWarning: Mongoose: mpromise (mongoose's default promise library) is deprecated, plug in your own promise library instead: http://mongoosejs.com/docs/promises.html
undefined
undefined

How to fix that error?

Try moving the `var Lobby = require('../models/lobbies-model');` line after you set `mongoose.Promise`. — JohnnyHK, Mar 08 '17 at 03:55

michelem · Accepted Answer · 2017-03-08T02:07:46.400

3

As stated here https://github.com/Automattic/mongoose/issues/4291#issuecomment-230312093 a workaround is to use mongoose.Promise = global.Promise; before the connect:

  mongoose.Promise = global.Promise; // ADD THIS
  mongoose.connect('localhost:27017/mydb');

edited Mar 08 '17 at 02:07

answered Mar 08 '17 at 01:19

michelem

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first line and second line should only keep one of them, right? – Jingshao Chen Mar 08 '17 at 02:05
Yep, updated, you should add bluebird with something like this http://bluebirdjs.com/docs/api/promisification.html – michelem Mar 08 '17 at 02:08
The OP is already calling `mongoose.Promise = require('bluebird');` in their code. – JohnnyHK Mar 08 '17 at 03:54

Mongoose: mpromise (mongoose's default promise library) is deprecated

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