Jason Morrison

January 19, 2006

Rochester on Rails

Ruby on RailsSustainable Productivity for Web Application Development

History

July 2004

DavidHeineimeier

Hansson

Extractedfrom

Basecamp

37signals

Hundreds of contributors

Thousands of revisions, tickets, and patches

Rails 1.0

December 13, 2005

What is Rails?

Full Stack

Web ApplicationFramework

It’s all Ruby!

(okay, except one file)

(here it is)database.yml

development: adapter: sqlite dbfile: db/dev.db

test: adapter: sqlite dbfile: db/test.db

production: adapter: sqlite dbfile: db/prod.db

Everything else is Ruby!

ActiveRecord

ActionPack

ERb views

ActionWebService

ActionMailer

Unit Testing

AJAX Helpers

Key Concepts

DRY:Don’t Repeat Yourself

+

Convention over configuration

=

Less code!

Order.hbm.xml

01 <hibernate-mapping>02 <class name="models.Order" table="ORDERS"03 dynamic-update="true" dynamic-insert="false">06 <id name="id" column="id" type="java.lang.Long" 07 unsaved-value="null">08 <generator class="identity"/>09 </id>10 <set name="items" lazy="false" inverse="false"11 cascade="none" sort="unsorted">12 <key column="id"/>13 <one-to-many class="models.Item"/>14 </set>15 <property name="name" type="java.lang.String"16 update="true" insert="true"17 access="property" column="name"/>18 </class>19 </hibernate-mapping>

Order.java

01 public class Order {02 private Set items;03 private String name;04 private Long id;05 06 public Long getId() { return id;}07 public void setId(Long id) { this.id = id;}08 public Set getItems() { return items;}09 public void setItems(Set items) { this.items = items; }10 public String getName() { return name; }11 public void setName(String name) { this.name = name; }12 }

order.rb

01 class Order < ActiveRecord::Base02 has_many :items03 end

Rails is expressive

class Project < ActiveRecord::Base belongs_to :portfolio has_one :project_manager has_many :milestones has_and_belongs_to_many :categories validates_presence_of :name, :description validates_acceptance_of :non_disclosure_agreement validates_uniqueness_of :keyend

#We’re slashing prices, all books are now half off!Product.find( :all, :conditions => “kind=‘book’” ) do |product| product.price *= 0.5 product.saveend

Increases Programmer

Railsincreases programmer…

Increases Programmer

Railsincreases programmerhappiness!

How does it fit together?

ModelView

Controller

ModelView

Controller

ActiveRecord

ActionPack}}

Ready, set, code!