create a new folder called my_node_project.

open the folder with vscode.

create package.json with the command:

npm init -y

install mongoose:

npm i mongoose

create the followiong files:

  • db.js
  • index.js
  • test.js
  • models/User.js
my_node_project
├── package.json
├── index.js
├── db.js
├── test.js
└── models
    └── User.js

Files Content

models/User.js

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const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
	name: String,
	email: String,
});

module.exports = mongoose.model('user', userSchema);

test.js

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const mongoose = require('mongoose');
const User = require('./User');
const db = require('./db');

main();

async function main() {
	db.connect();
	await createAvi();
	db.disconnect();
}

async function createAvi() {
	const avi = {
		name: 'avi biter',
		email: 'avi@gmail.com'
	};

	console.log('inserting avi...');
	await User.create(avi);
	console.log('avi was inserted');
}

db.js - in case your mongoDB runs in your localhost

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const mongoose = require('mongoose');

const protocol = 'mongodb';
const host = '127.0.0.1';
const mongoUrl = `${protocol}://${host}`;

const options = {
    dbName: 'myDB',
};

function connect() {
    mongoose.connect(mongoUrl, options);
}

function disconnect() {
    mongoose.connection.close();
}

module.exports = { connect, disconnect };

add scripts to package.json:

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{
	"scripts": {
		"start": "node index.js",
		"dev": "nodemon index.js",
		"test": "node test.js"
	},
}

Atlas

in case your mongoDB runs on Atlas do the following:

install dotenv

npm i dotenv

create a file called .env

MONGO_USER=nisim
MONGO_PASS=123
MONGO_HOST=bamba.bisli.mongodb.net

edit db.js as the following

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require('dotenv').config();
const mongoose = require('mongoose');

const protocol = 'mongodb+srv';
const host = env.process.MONGO_HOST;
const mongoUrl = `${protocol}://${host}`;

const options = {
    dbName: 'myDB',
    user: env.process.MONGO_USER,
    pass: env.process.MONGO_PASS,
};

function connect() {
    mongoose.connect(mongoUrl, options);
}

function disconnect() {
    mongoose.connection.close();
}

module.exports = { connect, disconnect };

to test your ability to connect to your MongoDB execute:

npm test

Express Server

install express pacakge

npm i express

edit index.js

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const db = require('./db');
const User = require('./models/User');
const express = require('express');
const port = 5000;

db.connect();

const app = express();

app.get('/users', async (req, res) => {
	const allUsers = await User.find();
	res.json(allUsers);
});

app.listen(port, () => {
    console.log('listen to port', port);
});

run your server

npm start

insert http://localhost:5000/users in your browser address bar to create a request to your end point.