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Single Page Application with Angular.js, Node.js and MongoDB (MongoJS Module)

June 25, 2013 51 Comments

Previously we have posted the communication for Developing Web Application with Node.js, Express.js and MongoDB (MongoJS module).

Current post is a proof of concept towards make a web application with Javascript based Web Server. This technological stack is popularly known as MEAN  Stack.

To make this possible, we have selected –

1> Angular.js for client side development – Single Page Application

2> Cross Domain Communication in between Angular.js and Node.js

3> Node.js for server side development

4> Rest based web service creation with express.js

5> Database – MongoDb

6> Node.js MongoDb Module Extention (mongojs)

We have created a Proof of Concept with Javascript based web server, where we have focused on dealing with NoSql (MongoDB) with javascript based framework Node.js and angular.js on client side.

Our initial code can be downloaded here.

Architecture at a glance –

Angularjs Nodejs MongoDB

So here are the steps –

Installation –

A> Download and install Node.js from here.

B> To Develop the application we need to install mongojs module for Node.js

Command – npm install mongojs (should be connected to internet)

C> We need to install express.js for node.js

Command – npm install express  (should be connected to internet)

Configuration Code –

Now, we will try to describe the code portion –

 
var application_root = __dirname,
    express = require("express"),
    path = require("path");

Here we have initialised the express.js within javascript variables in respect of Node.js concept.

 
var app = express();

Here we have initialised the express web server in app variable.

 
var databaseUrl = "sampledb"; 
var collections = ["things"]
var db = require("mongojs").connect(databaseUrl, collections);

Here we have made the connection to the mongodb database using the Node.js mongojs module extension library.

 
// Config

app.configure(function () {
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(path.join(application_root, "public")));
  app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

Here we have made the configuration related to express.js

Rest Services Code –

 
app.get('/api', function (req, res) {
  res.send('Our Sample API is up...');
});

Here we have made our first REST based web service and tested whether the express.js is up.

Our sample api will be  – http://127.0.0.1:1212/api (Get Method)

 
app.get('/getangularusers', function (req, res) {
	res.header("Access-Control-Allow-Origin", "http://localhost");
	res.header("Access-Control-Allow-Methods", "GET, POST");
        // The above 2 lines are required for Cross Domain Communication(Allowing the methods that come as Cross           // Domain Request
	db.things.find('', function(err, users) { // Query in MongoDB via Mongo JS Module
	if( err || !users) console.log("No users found");
	  else 
	{
		res.writeHead(200, {'Content-Type': 'application/json'}); // Sending data via json
		str='[';
		users.forEach( function(user) {
			str = str + '{ "name" : "' + user.username + '"},' +'\n';
		});
		str = str.trim();
		str = str.substring(0,str.length-1);
		str = str + ']';
		res.end( str);
                // Prepared the jSon Array here
	}
  });
});

Here we have created another REST api to get all username from user collection and so have done the mongojs query.

Our sample api will be  – http://127.0.0.1:1212/getangularusers (Get Method)

 
app.post('/insertangularmongouser', function (req, res){
  console.log("POST: ");
  res.header("Access-Control-Allow-Origin", "http://localhost");
  res.header("Access-Control-Allow-Methods", "GET, POST");
  // The above 2 lines are required for Cross Domain Communication(Allowing the methods that come as Cross 
  // Domain Request
  console.log(req.body);
  console.log(req.body.mydata);
  var jsonData = JSON.parse(req.body.mydata);

  db.things.save({email: jsonData.email, password: jsonData.password, username: jsonData.username},
       function(err, saved) { // Query in MongoDB via Mongo JS Module
           if( err || !saved ) res.end( "User not saved"); 
           else res.end( "User saved");
       });
});

Here we have made a POST request to create an user via REST calling.

Our sample api will be  – http://127.0.0.1:1212/insertangularmongouser(Post Method)

 
// Launch server
app.listen(1212);

We have made the server to listen at 1212 port.

Now run node appmongodbangular.js from command shell.
javascriptnosqlbook

Angular.js part –

Below is the code in Angular Controller –

 
'use strict';

var myApp = angular.module('myApp', []); // Taking Angular Application in Javascript Variable

// Below is the code to allow cross domain request from web server through angular.js
myApp.config(['$httpProvider', function($httpProvider) {
        $httpProvider.defaults.useXDomain = true;
        delete $httpProvider.defaults.headers.common['X-Requested-With'];
    }
]);

/* Controllers */

function UserListCtrl($scope, $http, $templateCache) {

  var method = 'POST';
  var inserturl = 'http://localhost:1212/insertangularmongouser';// URL where the Node.js server is running
  $scope.codeStatus = "";
  $scope.save = function() {
    // Preparing the Json Data from the Angular Model to send in the Server. 
    var formData = {
      'username' : this.username,
      'password' : this.password,
	  'email' : this.email
    };

	this.username = '';
	this.password = '';
	this.email = '';

	var jdata = 'mydata='+JSON.stringify(formData); // The data is to be string.

	$http({ // Accessing the Angular $http Service to send data via REST Communication to Node Server.
            method: method,
            url: inserturl,
            data:  jdata ,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            cache: $templateCache
        }).
        success(function(response) {
		console.log("success"); // Getting Success Response in Callback
                $scope.codeStatus = response.data;
		console.log($scope.codeStatus);

        }).
        error(function(response) {
		console.log("error"); // Getting Error Response in Callback
                $scope.codeStatus = response || "Request failed";
		console.log($scope.codeStatus);
        });
	$scope.list();// Calling the list function in Angular Controller to show all current data in HTML
        return false;
  };	

  $scope.list = function() {
	  var url = 'http://localhost:1212/getangularusers';// URL where the Node.js server is running	
	  $http.get(url).success(function(data) {
		$scope.users = data;
	  });
          // Accessing the Angular $http Service to get data via REST Communication from Node Server 
  };

  $scope.list();
}

Angular Template and HTML

 <html lang="en" ng-app="myApp">
.....

We have referred the Angular Application in above code

 <body ng-controller="UserListCtrl">
.....

We have referred the Angular Controller in above code

Search: <input ng-model="user">
<div class="span10">
    <!--Body content-->
    <ul class="users">
        <li ng-repeat="user in users | filter:user ">
            {{user.name}}
        </li>
    </ul>
</div>

We have used the ng-repeat tag to take the users data model from REST communication and shown in HTML

 
<form name="myform" id="myform1" ng-submit="save()">
    <fieldset>
        <legend>New User</legend>
            <div class="control-group">
                <center><input type="text" placeholder="User…" ng-model="username" size=50 required/></center>
                <center><input type="text" placeholder="Password…" ng-model="password" size=50 required/></center>
                <center><input type="text" placeholder="Email…" ng-model="email" size=50 required/></center>
            </div>
    </fieldset>
    <p>
         <div><center><button type="submit" >Save now...</button></center></div>
    </p>
</form>

We have used the ng-submit tag to send the user data model from REST communication and sent to node server to save in MongoDB.

Reader can download the complete source-code in GitHub.

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Comments (51)

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  1. Darryl Snow says:

    How do you run it? If you run node /server/appmongodbangular.js then you’ll run the server part /api on port 1212, but what about the client? Thanks

  2. codedungeon says:

    So why use mongojs library? just curious what it offers over native Mongo commands?

  3. Mukesh Soni says:

    Can’t read the article on mobile due to the floating social icons on top

  4. thecity2 says:

    I use this same stack for my website (nbawowy.com), but call it AMEN. 😉

  5. Vo Thanh Thang says:

    Thank alot for your project, but I still do not know how to run your project. How to config Apache web sever?, where to put your project folder?, where is the code of
    Cross Domain Communication in between Angular.js and Node.js?. I am newbie like a dummy. Thank so much

    • Piyas De says:

      Please install node.js and other modules as written in “Installation” section.

      Please google for Apache Web Server installation and put application in htdocs folder.

      Please go through the “res.header” section of node.js code in the post which is commented as Cross Domain Configuration.

      Please go through the above instruction and comment for any help required, that we can.

  6. Diego Vieira says:

    impossible to read this article. the top slider keeps making the text going up and down.

  7. Katsumoto says:

    str='[‘;
    users.forEach( function(user) {
    str = str + ‘{ “name” : “‘ + user.username + ‘”},’ +’n’;
    });
    str = str.trim();
    str = str.substring(0,str.length-1);
    str = str + ‘]’;
    res.end( str);
    // Prepared the jSon Array here

    This is a joke??

    • Piyas De says:

      What do you want to understand here? Here we have made the json array and send to browser client i.e. angular.js framework to parse it. Also this article is is a poc of the whole stack and it is running.

  8. bcs says:

    Can you please give an example on how to connect to Oracle Database using
    node-odp(https://npmjs.org/package/node-odp)?

    AngularJS+Node.JS+Express.JS+Oracle

  9. Vi says:

    I am getting below error while installing mongojs module.

    MSBUILD : error MSB3428: Could not load the Visual C++ component “VCBuild.exe”.
    To fix this, 1) install the .NET Framework 2.0 SDK, 2) install Microsoft Visua
    l Studio 2005 or 3) add the location of the component to the system path if it
    is installed elsewhere. [C:Usersvinay_000angular-phonecatnode_modulesmong
    ojsnode_modulesmongodbnode_modulesbsonbuildbinding.sln]

    Do I really need to install these additional components in order to make this work?

    • Piyas De says:

      Hi,

      As the issue is seen, somehow your node.js installation is not correct. Actually if node.js is build from source, then it will be fine. In my linux box, I have built the node.js with GC++ and all other installation were fine. Generally for some node.js modules, the above type of issues are seen. So I have switched my development of node.js applications from windows to linux.

      Thanks

  10. pixelBender67 says:

    your code is outdated, express has changed. It would be great if you updated the code to work with express v4

  11. samir says:

    I cant download project from GitHub. Can you please provide full url of GitHub Project.

  12. Daniel Baah says:

    I went through multiple angular / node tutorials… and this is the only one that I could get to work…

    Thanks!

  13. Majid Lotfi says:

    HI, Thank you for this tutorial, I download it, went to the server folder and did :

    C:UsersalotfinodeJSNodeMongoDBAngularserverappmongodbangular.js:12
    app.configure(function () {
    ^
    TypeError: Object function (req, res, next) {
    app.handle(req, res, next);
    } has no method ‘configure’
    at Object. (C:UsersalotfinodeJSNodeMongoDBAngularserverappmongodbangular.js:12:5)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)

    at node.js:906:3

    Please your help is appreciated.

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