Create table in MongoDB using NodeJS

Here, we will discuss how to create a MongoDB TABLE/COLLECTION using db.createCollection() method with NodeJS in this Tutorial. We'll finish up by creating a quick example that uses Node Express and MongoDB to store and serve content.

Let's dive straight into it.

NodeJS MongoDB Create Collection

To build a collection in MongoDB, first, create a MongoClient object, then define a link URL that includes the correct IP address and the database name.

Step 1: Start MongoDB.

To start MongoDB Service, type the following code.

sudo service mongod start

Step 2: Get the MongoDB Service's base URL.

To find the MongoDB Service's base URL, open a Terminal and run Mongo Shell.

Shashank@nodejs:~$ mongo
MongoDB shell version v3.4.9
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.9
Server has startup warnings: 
2017-10-29T18:15:36.110+0530 I STORAGE  [initandlisten]

The base URL of MongoDB is echoed back by the Mongo Shell as it starts up.

mongodb://127.0.0.1:27017

Step 3: Prepare the complete URL

Make sure you have the full URL. To the base URL, append the database name you want to build (newdb).

mongodb://127.0.0.1:27017/newdb

Step 4: Create a MongoClient.

Now, Build a Mongo::Client object to bind to a MongoDB deployment. That's an important step to connect out MongoDB with NodeJS in our application.

var MongoClient = require('mongodb').MongoClient;

Step 5: Binding To Server

With the support of the URL, bind MongoClient to the MongoDB Server.

MongoClient.connect(mongodb://127.0.0.1:27017/newdb, function(err, db));

The dB object points to the newly generated database newdb if the relationship is good.

Step 6: Create a MongoDB Set.

The syntax of the createCollection() function, which is used to build collections in MongoDB from NodeJS, is as follows.

db.createCollection(<collection_name>, <callback_function>)

Example

Now, we have seen all the essential steps to create TABLE in our MongoDB database, now let's compile it together.

// Script.js

// we create 'users' collection in newdb database
var url = "mongodb://localhost:27017/newdb";
 
// create a client to mongodb
var MongoClient = require('mongodb').MongoClient;
 
// make client connect to mongo service
MongoClient.connect(url, function(err, db) {
    if (err) throw err;
    // db pointing to newdb
    console.log("Switched to "+db.databaseName+" database");
    // create 'users' collection in newdb database
    db.createCollection("users", function(err, result) {
        if (err) throw err;
        console.log("Collection is created!");
        // close the connection to db when you are done with it
        db.close();
    });
});

Output:

shashank@tutorialkart:~/workspace/nodejs/mongodb$ node script.js 
Switched to newdb database
Collection is created!

Conclusion

Finally, at the end of the tutorial, we looked at MongoDB usability and how to use NodeJS to build a collection. Keep following for more excellent as well as informative tutorials.

Happy Learning!