MongoDB - Error: invalid schema, expected mongodb

Question

I\'m new in building application with MEAN Stack, I\'m trying to build a real time chat app, here is my server side :

console.log(\"Server running...!\");

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Answer 1

the working code would be like this

don't forget to replace username, password & URL

const socketClient = require('socket.io').listen(4000).sockets;
const MongoClient = require('mongodb').MongoClient;

const uri = "mongodb+srv://:@cluster0-saugt.mongodb.net/test?retryWrites=true&w=majority";

const client = new MongoClient(uri, { useNewUrlParser: true });
client.connect(err => {
    socketClient.on('connection', function (socket) {

        //Need to Get the Database first before trying to access the collections.
        let chat = client.db("test").collection('chats');

        // Get chats from mongo collection
        // perform actions on the collection object
        chat.find().limit(100).sort({ _id: 1 }).toArray(function (err, res) {
            if (err) {
                throw err;
            }

            // Emit the messages
            socket.emit('output', res);
        });


    });

});