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Node.js

• Runtime for JavaScript (på server)
   
• Your computer is a server!

REST

http://phpflow.com/wp-content/uploads/2012/07/rest-websrvices.jpg

Express + body-parser

var server = require('express')();
var bodyParser = require('body-parser');

server.use(bodyParser.json());

var port = 5432;

server.get('/api', function(req, res) {
    return res.status(201).send({message: 'hi'});
});

server.post('/api', function(req, res) {
    console.log(req.body);
    return res.send(req.body);
});

server.listen(port);
console.log('listening on: ' + port);

Static content

server.use(express.static(__dirname + './path/to/static/files'));

• Server statisk innhold
   
• Filer, bilder
   
• Angular-appen?
   
• (note: Emmet)

Documents vs. Databases

• Remember SQL?
  
   
• Forget all that

Relasjoner vs. dokumenter

Lagringsformat: bson

• Binary JSON
   
• ObjectId
  • Basert på timestamp
     
• Dokumenter "=" objekter
   
• Joins
   
• Polymorfi

Enter mongodb

$ mongo exampleDb
MongoDB shell version: 2.6.5
connecting to: exampleDb

> db.users.insert({username: 'Theneva'})
WriteResult({ "nInserted" : 1 })

> db.users.insert({username: 'HeroK0'})
WriteResult({ "nInserted" : 1 })

> db.users.find()
{ "_id" : ObjectId("54c5fbe88ede449775e517d2"), "username" : "Theneva" }
{ "_id" : ObjectId("54c5fbf58ede449775e517d3"), "username" : "HeroK0" }

http://docs.mongodb.org/manual/installation/

OSX-PS:
​$ brew info mongodb

Mongodb

• Ikke sett opp noe på forhånd; Mongo lager...
  • DB
  • Collections ("tabeller")
     
• MEN sørg for at ting kjører!

mongodb is webscale

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');

var Cat = mongoose.model('Cat', { name: String });

var kitty = new Cat({ name: 'Zildjian' });
kitty.save(function (err) {
  if (err) // ...
  console.log('meow');
});

http://mongoosejs.com/docs/index.html

Everything is a schema

var mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/exampleDb', function() {
    console.log('Connected to MongoDB');
});

var personSchema = new mongoose.Schema({
    name: { type: String, required: true },
    email: { type: String, required: true }
});

https://github.com/LearnBoost/mongoose/blob/master/README.md#embedded-documents

Models brukes for alt

var mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/exampleDb', function() {
    console.log('Connected to MongoDB');
});

var personSchema = new mongoose.Schema({
    name: { type: String, required: true },
    email: { type: String, required: true }
});

var Person = mongoose.model('Person', personSchema);

var a = new Person({
    name: 'Rebecca Black',
    email: 'rebecca@rebeccablackonline.com'
});

a.save();

Embedded documents

• Eksporter schema for subdoc
   
• Referer som vanlig
   
• Eksporter model, referer til model.schema?

Fra forrige gang:

RAM-"persistering" i Express

var express = require('express');
var app = express();
app.use(require('body-parser').json());

var artists = [
    'Rebecca Black',
    'Double Take',
    'Alison Gold',
    'Jenna Rose',
    'Alana Lee'
];

app.get('/', function(req, res) {
    res.send(artists);
});

app.post('/', function(req, res) {
    artists.push(req.body.name); // some artist name
    res.status(201).send();
});

app.listen(2345);

PS: Fantastiske artister

Express <3 Mongoose

var app = require('express')();
var mongoose = require('mongoose');

app.use(require('body-parser').json());

var personSchema = new mongoose.Schema({
	name: { type: String, required: true }
});

var Person = mongoose.model('Person', personSchema);

app.get('/person', function(req, res) {
	var person = new Person({
		name: 'Martin'
	});

	res.send(person);
});

app.listen(1234);

EKSEMPEL: Fra bunnen av, med persistering