Ruby on Rails

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RUBY ON RAILS
It’s so rad
What we’ll cover
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What is Ruby?
What is RoR?
Why RoR?
Developing with RoR
Deployment
Demo
Questions
What is Ruby?
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Object-oriented language
Written in 1995 by some smart Japanese man
Influenced by PERL, Python, and Lisp (but mostly
Python)
EASY to understand, simple syntax
What is RoR?
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Full stack web application framework
Written in Ruby (duh)
Since 2004
Open Source
Focused on rapid application development
Why Ruby on Rails?
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Rails is a framework
Python – TurboGears, Django
 Java - JSP/Servlets, Struts
 PHP – Cake, Symfony
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Convention over Configuration
Super fast to get started writing useable code
class Project < ActiveRecord::Base
belongs_to :portfolio
has_one :project_manager
has_many :milestones
end
Developing with RoR
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Rails gives the developer a solid infrastructure to build a
web application
Model View Controller (MVC)
Model, the Object Relational Mapper
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Automatically maps the database to objects
Very easy and natural to work with
Thin layer with SQL – dynamically generates SQL queries
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User.find_all
User.find(:first, :conditions => [“user = ? AND password =?”], user,
pass)
Controller, the logic of the application
View, provides HTML templates and UI helpers
Developing with RoR
Developing with RoR
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Support many database back-ends (db agnostic)
 Oracle,
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MySQL, PosgreSQL, SQLite
Built-in support for AJAX
Built-in functional and unit testing
Code tests while you develop
Test templates are automatically generated
Rails comes with a complete toolbox of classes,
helpers and utilities
Deployment
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Rails apps are compatible with Unix and Windows
environments
Rails apps can be deployed on multiple web server
Configurations
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Easy control of the deployment with Capistrano
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Mod_rails (Phusion Passenger)
Mongrel/Mongrel Cluster (plus some Apache goodness for proxy)
FastCGI – running behind Apache or Lighty
CGI
WEBrick – a standalone Ruby web server, easy for development
A scripting tool to control the deployment of the application on multiple sites
Easy control of schema migration
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rake migrate VERSION=3
Demo
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Real-time demo of the “Blog in 15 Minutes” (so it
will probably take at least 20)

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