How to create database in Mongodb using Node js?

Question

Iam beginner, first i installed npm install mongodb, then i create js file as demo_create_mongo_db.js

I used following code to create database

var MongoClient = require('mongodb').MongoClient;
//Create a database named "mydb":
var url = "mongodb://localhost:27017/mydb";

 MongoClient.connect(url, function(err, db) {
 if (err) throw err;
 console.log("Database created!");
 db.close();
 });

then i just run node demo_create_mongo_db.js following error occured

Why this error occur? how can i handle this?

Thanks

You need to install MongoDB database in your system and run mongod server to listen to any mongodb request on port 27017. In a separate terminal run mongod.exe also — Puneet Singh
– Puneet Singh, Commented Oct 21, 2017 at 9:36

Ahmad Sharif · Accepted Answer · 2019-09-30 13:23:08Z

1

index.js

At first, install MongoDB module by running this command.

npm install mongodb --save

Just keep in mind that you can not create the only database. You have to create also the collection to see your new database.

const mongodb = require('mongodb');
const uri = 'mongodb://localhost:27017';
const client = new mongodb.MongoClient(uri);

client.connect((err) => {
    if (!err) {
        console.log('connection created');
    }
    const newDB = client.db("YourNewDatabase");
    newDB.createCollection("YourCreatedCollectionName"); // This line i s important. Unless you create collection you can not see your database in mongodb .

})

Now run this index file by the following command in your terminal

node index.js

answered Sep 30, 2019 at 13:23

Ahmad Sharif

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Sakthikanth · Accepted Answer · 2019-09-30 13:31:46Z

1

You can use Mongoose library to connect to MongoDB in Node JS

 var mongoose = require('mongoose');
 mongoose.connect('mongodb://localhost:27017/'+db_to_connect,{ useNewUrlParser: true });

 var db = mongoose.connection;
 db.on('error', function(){             
 });
 db.once('open', ()=> {
 });

answered Sep 30, 2019 at 13:31

Sakthikanth

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Le Dinh Dam · Accepted Answer · 2017-10-21 09:37:20Z

0

Seem your mongo server havn't runing yet!! run mongo in comment line to check if mongo server is runing or not.

answered Oct 21, 2017 at 9:37

Le Dinh Dam

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