Ruby on Rails Introduction

Ruby on RailsPeak IT, 17 September 2008

Joost Hietbrink?www.linkedin.com/in/joosthietbrink

www.yelloyello.com

source: http://en.wikipedia.org/wiki/Ruby_(programming_language)

• Birthday: 24 February 1993

• v1.0: 25 December 1996

• “more powerful than Perl, and more OO than Python”

• 99.9% Object Oriented

Yukihiro ‘Matz’ Matsumoto, creator of Ruby.

try ruby! (in your browser)http://tryruby.hobix.com/

• Birth: July 2004

• Shipped with OSX Leopard

• Latest: 2.1.1: 4 September 2008

David ‘dhh’ Heinemeier Hansson

Ruby on Rails vs.JavaPHP.NET

ColdFusionDjango

...

Websites on Rails

Companies using Rails

The Framework

source: http://flickr.com/photos/charlesbodi/236037049/

• Convention over Configuration

• Agile Programming principle

• DRY

app controllers helpers models viewsconfig environments initializersdbdoclib taskslogpublic images javascripts stylesheetsscript performance processtest fixtures functional integration unit...

ModelView

Controller

Framework (MVC)

Modelssource: http://flickr.com/photos/74982136@N00/252447564

ActiveRecord

source: http://media.rubyonrails.org/presentations/pursuitofbeauty.pdf

Fat Models

ActionControllersource: http://flickr.com/photos/sameli/261307204/

RESTfulResources

HTTP verb Controller Action

CRUD Action URL

GET show READ /products/1/products/1.xml

POST create CREATE /products

PUT update UPDATE /products/1

DELETE destroy DESTROY /products/1

GET new /products/new

GET index /products

GET edit /products/1/edit

source: http://rubyenrails.nl/articles/2006/11/02/restful-rails

ActionViewsource: http://flickr.com/photos/bocavermelha/66759796/

action.mimetype.renderer

show.html.erbindex.rss.builderedit.iphone.haml

Generateinstead of

Create

DRY vs. DRO

source: http://media.rubyonrails.org/video/rails_take2_with_sound.mov

Demo?!

?

Joost HietbrinkJoopp (joopp.com/blog.joopp.com)

joost@joopp.nl06 14 89 65 41

More info

• rubyonrails.org

• railscasts.com

• peepcode.com

• rubyenrails.nl

• slideshare.net:

• http://www.slideshare.net/mattb/coding-on-the-shoulders-of-giants

Other interesting stuff..

• http://www.slideshare.net/daveman692/supporting-the-open-web-oscon-2008

• http://microformats.org/

• http://www.dataportability.org/

• http://git.or.cz/

How to create aMP3 Playing Alarm Clock

in Ruby?

sleep7.hours%x(open~/heaven‐sent.mp3)