Full Backend Project Connect MongoDB Atlas in NodeJS Part - 2

If you complete the first part of this blog series then lets get start with mongoDB. read part-1

• first of all goto: MONGODB ATLAST login with your email then create a project.

• then create a cluster and fill-up the form and save the username and password after saving scroll down and allow the IP Address: 0.0.0.0/0 for testing perpose

• then all done save and click on connect button and click on on the VSCODE option and copy the connection string.

after that open VSCODE select .env file and add the following code with your username and password

PORT=8000
MONGO_URI=mongodb+srv://username:[e-mail]

save the files.

• then open the constants.js file and add the following code:

export const DB_NAME = "choose_a_name";

• then save all the following files

• then open your terminal and install this following NPM packages mongoose express dotenv

copy the following snippets in your terminal and past

npm i mongoose express dotenv 

• after successfully installed done open db/index.js file and copy the following code:

import {DB_NAME} from "../constants.js";
import mongoose from "mongoose";

const connectDD = async () => {
    try {
        const connectionDB = await mongoose.connect(`${process.env.MONGO_URI}/${DB_NAME}`);
        console.log(`MONGODB Connected: ${connectionDB.connection.host}`);
    } catch (error) {
        console.log(`MONGODB Connection Error: ${error.message}`);
        process.exit(1);
    }
}

export default connectDD;

• then save the file and open index.js root file and copy the following code:

import dotenv from "dotenv";
import connectDD from "./db/index.js";

dotenv.config();
connectDD();

• then save the files and open your terminal and run

npm run dev

Congratulation your database successfully connected with your server