Mongoose 4.11.0 Promises timing out - node.js

Question

I'm using mongoose and bluebird.
The setup is by-the-book, and is using the useMongoClient option, as requested by the notification.
Mongoose.connect(myConnectionString, {useMongoClient: true});
however none of the promises I use execute.

Answer 1

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/starbucks', { useMongoClient:
true });
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('openUri', function() {
// we're connected!
});
I have used this code for latest version and warning has gone. Please try it. Or use older version.

Answer 2

I've found that this is likely a bug with mongoose
problem went away after rolling back mongoose version
npm uninstall -save mongoose
npm install -save mongoose#4.10.8
OR you can remove the useMongoClient option Mongoose.connect(connectionString);, and ignore the message
DeprecationWarning: open() is deprecated in mongoose >= 4.11.0, use openUri() instead, or set the useMongoClient option if using connect() or createConnection()
https://github.com/Automattic/mongoose/blob/master/History.md
shows
hope this helps someone

Answer 3

This code solves all deprecation warnings:
mongoose.Promise = global.Promise;
mongoose.connect(uri, {
keepAlive: true,
reconnectTries: Number.MAX_VALUE,
useMongoClient: true
});
Example:
const mongoose = require("mongoose");
module.exports.connect = uri => {
mongoose.connect(uri, {
keepAlive: true,
reconnectTries: Number.MAX_VALUE,
useMongoClient: true
});
// plug in the promise library:
mongoose.Promise = global.Promise;
mongoose.connection.on("error", err => {
console.error(`Mongoose connection error: ${err}`);
process.exit(1);
});
// load models
require("./user");
};

Answer 4

For further reading, a contributor discusses new behaviors here: https://github.com/Automattic/mongoose/issues/5399#issuecomment-312523545