Node.js Web Development - Fourth Edition

MongoDB model for the Notes application

Now that you've proved you have a working MongoDB server, let's get to work.

Installing the Node.js driver is as simple as running the following command:

$ npm install mongodb@3.x --save

Now create a new file, models/notes-mongodb.mjs:

import util from 'util';import Note from './Note';import mongodb from 'mongodb'; const MongoClient = mongodb.MongoClient;import DBG from 'debug';const debug = DBG('notes:notes-mongodb'); const error = DBG('notes:error-mongodb'); var client;async function connectDB() {     if (!client) client = await MongoClient.connect(process.env.MONGO_URL);    return {         db: client.db(process.env.MONGO_DBNAME),         client: client    };}

The MongoClient class is used to connect with a MongoDB instance. ...