Not being able to connect to mongoDB - node.js

Question

I am trying to connect my app to MongoDB but i get the following error as i run my app:
DepracationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
[MONGODB DRIVER] Warning: Current Server Discover and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to MongoClient constructor
I know both above are just warnings but they are stopping my app and no letting me run it.
This is how i am setting the connection to mongodb in app.js:
const path = require('path');
const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const session = require('express-session');
const MongoDBStore = require('connect-mongodb-session')(session);
const csrf = require('csurf');
const flash = require('connect-flash');
const multer = require('multer');
const errorController = require('./controllers/error');
const User = require('./models/user');
const MONGODB_URI =
'mongodb+srv://mateoghidini:<PASSWORD>#cluster0.9dernor.mongodb.net/test';
const app = express();
const store = new MongoDBStore({
uri: MONGODB_URI,
collection: 'sessions'
});
const csrfProtection = csrf();
const fileStorage = multer.diskStorage({
destination: (req, file, cb) => {
cb(null, 'images');
},
filename: (req, file, cb) => {
cb(null, new Date().toISOString() + '-' + file.originalname);
}
});
const fileFilter = (req, file, cb) => {
if (
file.mimetype === 'image/png' ||
file.mimetype === 'image/jpg' ||
file.mimetype === 'image/jpeg'
) {
cb(null, true);
} else {
cb(null, false);
}
};
app.set('view engine', 'ejs');
app.set('views', 'views');
const adminRoutes = require('./routes/admin');
const shopRoutes = require('./routes/shop');
const authRoutes = require('./routes/auth');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(
multer({ storage: fileStorage, fileFilter: fileFilter }).single('image')
);
app.use(express.static(path.join(__dirname, 'public')));
app.use('/images', express.static(path.join(__dirname, 'images')));
app.use(
session({
secret: 'my secret',
resave: false,
saveUninitialized: false,
store: store
})
);
app.use(csrfProtection);
app.use(flash());
app.use((req, res, next) => {
res.locals.isAuthenticated = req.session.isLoggedIn;
res.locals.csrfToken = req.csrfToken();
next();
});
app.use((req, res, next) => {
// throw new Error('Sync Dummy');
if (!req.session.user) {
return next();
}
User.findById(req.session.user._id)
.then(user => {
if (!user) {
return next();
}
req.user = user;
next();
})
.catch(err => {
next(new Error(err));
});
});
app.use('/admin', adminRoutes);
app.use(shopRoutes);
app.use(authRoutes);
app.get('/500', errorController.get500);
app.use(errorController.get404);
app.use((error, req, res, next) => {
// res.status(error.httpStatusCode).render(...);
// res.redirect('/500');
res.status(500).render('500', {
pageTitle: 'Error!',
path: '/500',
isAuthenticated: req.session.isLoggedIn
});
});
mongoose
.connect(MONGODB_URI)
.then(result => {
app.listen(3000);
})
.catch(err => {
console.log(err);
});
Is any of the packages that i am requiring above deprecated? Or should i include new lines of code that i am missing?

Answer 1

I remember having similar issue, so first of all make sure your mongoose version is above 5.7.1, if it is you can pass the options objects suggested from your warning message to your connect function like so:
mongoose
.connect(MONGODB_URI, {useNewUrlParser: true, useUnifiedTopology: true})
.then(result => {
app.listen(3000);
})
.catch(err => {
console.log(err);
});