Tuesday, September 23, 2014

NodeJs mongoDB : With sample application

Hi,

NodeJs connectivity with the MongoDB Database.
Here, i am assuming that you have NodeJS, NPM and socket.io installed on your machine. If not kindly follow the below URL to install the above tools:
http://tarunlinux.blogspot.in/2014/09/nodejs-basics.html

Lets start to create sample appication on NodeJs with mongoDB connectivity.

Step 1: Install mongoDB on your machine... Please follow the below link to setup mongoDB..
http://tarunlinux.blogspot.in/2014/09/mongodb-basics.html

Step 2: Install NodeJS mongoDB dependency with the below command:

1
# sudo npm install mongodb



It will install mongodb module in your application.

Step 3: Create server.js file for the nodejs:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
var mongo = require('mongodb').MongoClient;
var client = require('socket.io').listen(8080).sockets;  //Load socket.io module

mongo.connect('mongodb://localhost/tarundb', function(err, db){
    client.on('connection', function(socket){
        var col = db.collection('employee'); //connect with collection of tarundb

        //Insert data into mongodb
        col.insert({name: 'Tarun', age:26}, function() {
            console.log("Inserted");
        });
        
        //emit all the records
        col.find().limit(100).toArray(function(err, res){
            if(err) throw err;
            
            socket.emit('all-data', res);
        });
    });
});


Step 4: Create Index.html file for the frontend:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
<html>
    <head>
        <title> NodeJs MongoDB APP </title>
    </head>
    <body>
        <div class="data-set"></div>
        <script src="http://localhost:8080/socket.io/socket.io.js" type="text/javascript"></script>
        <script src="http://code.jquery.com/jquery-2.1.1.min.js" type="text/javascript"></script>
        <script>
        (function(){
            try{
                var socket = io.connect('http://localhost:8080');
            } catch(e){
                console.log(e);
            }
            
            if(socket !== undefined) {
                socket.on('all-data', function(data){
                    for(var i=0; i < data.length; i++) {
                        $(".data-set").append('<li>'+ data[i].name +'</li>');
                    }
                });
            }
        })();
        </script>
    </body>
</html>


Step 5: Now you have to run server.js file
# nodejs server.js

Then open your browser, with url: http://localhost:8080/
Where you will see the mongoDB connectivity and their data.

I hope it will help you for NodeJs Connectivity with MongoDB.. If you have any query, please put your comments, i highly appreciate that ...

Bye..

2 comments :

Cognegic said...

Check your MongoDB Connection with Cognegic's MongoDB Technical Support
On the off chance that you need to test the MongoDB association then first you need to utilize implanted Mongo which is composed in Java. To start with you need to download the Mongo and store it in home index and after that run it. Be that as it may, ensure on the off chance that you stand up to an issue in regards to MongoDB like association issue, reinforcement issue, recuperation issue et cetera then connect with our MongoDB Online Support or Support for MongoDB Database Software.
For More Info: https://cognegicsystems.com/
Contact Number: 1-800-450-8670
Email Address- info@cognegicsystems.com
Company’s Address- 507 Copper Square Drive Bethel Connecticut (USA) 06801

Cognegic said...

Solve MongoDB Connection if it not instated on Node.js through MongoDB Technical Support
If you found that the affiliation isn't presented and you will get the "Indistinguishable DB" issue then obviously the issue is associated with your affiliation issue. To get out the game plan of this issue just contact to MongoDB Online Support or Support for MongoDB Database Software. With Cognegic's MongoDB Customer Support USA you will get complete the process of watching and checking of your MongoDB condition and get the lively and trustworthy plan.
For More Info: https://cognegicsystems.com/
Contact Number: 1-800-450-8670
Email Address- info@cognegicsystems.com
Company’s Address- 507 Copper Square Drive Bethel Connecticut (USA) 06801