mongoDB (from "humongous") is a cross-platform document-oriented database.

No Schema?!

• Documents (JSON Objects)
• No relations

• Indices make it fast
• BSON (Binary JSON)

RDBMS

Database

Table

Column

Row

Primary Key

MongoDB

CRUD Operations

docs

Creating

• use *database_name*
• show dbs
• db.createCollection(*coll_name*)
• show collections

Inserting

• db.my_collection.insert({'age': 26, 'name': 'gustav'})

Reading

• db.my_collection.find()
• db.my_collection.find().pretty()
• db.my_collection.find({'age': 26})
• db.my_collection.find({'age': {$gt: 24}})

docs

Updating

• db.my_collection.update({'age': 26}, {'age': 27})
• db.my_collection.update({'age': 26}, {$set: {'age': 27}})

Deleting

• db.my_collection.remove({'age': 25})

Advanced Operations

Find with projection

• db.my_collection.find({'age': 23}, {'age': 1, '_id': 0})

Limiting

• db.my_collection.find().limit(2)
• db.my_collection.find().limit(2).skip(3)
• db.my_collection.findOne()

Indexing

To avoid full collection scan for a query, ensure indices of fields you are likely to use

Aggregation framework

docs

Tests

Functions

User interface

Mocha

Mocha is a feature-rich JavaScript test framework running on node.js and the browser, making asynchronous testing simple and fun.

http://mochajs.org/

Install Mocha

$ npm install -g mocha

Mocha

describe('###Test Description###', function(){

  describe('###Detailed Test Description###', function(){

    it('should ###do stuff###', function(){
      //assert stuff using 
      //third party assert library
    })

  })
})

test/test.js

$ mocha

Mocha async

describe('###Test Description###', function(){

  describe('###Detailed Test Description###', function(){

    it('should ###do stuff###', function(done){
      //assert stuff using 
      //third party assert library
      done();
    })

  })
})

Mocha + assertion lib

• should.js

• expect.js

• better-assert

• chai

Chai

Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.

http://chaijs.com/

Expect

var expect = require('chai').expect;
var request = require('request');

describe('Complete webapp', function(){
    before(function(done){
        request('http://localhost:3000/logout', function(err, res, body){
            expect(err).to.not.exist;
            done();
        });
    });

    it('should load the start page successfully', function(done){
        request('http://localhost:3000', function(err, res, body){
            expect(err).to.not.exist;
            expect(res.statusCode).to.equal(200);
            done();
        });
    });
});

Install Grunt

$ npm install -g grunt-cli
$ npm install grunt --save-dev

Gruntfile.js

module.exports = function(grunt) {

    grunt.initConfig({
        jshint: {
            files: ['package.json', 'Gruntfile.js', 'routes/*.js'],
            options: {
                // options here to override JSHint defaults
                globals: {
                    jQuery: true,
                    console: true,
                    module: true,
                    document: true
                }
            }
        }
    });

    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.registerTask('test', ['jshint']);
}