Ruby presents
Ruby
snoozer.05@gmail.com
AppleStoreSapporo 2007-10-31( )

✓
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✓
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snoozer.05
✓
✓ ʻ06
✓ Ruby
✓ Ruby
✓ RubyKaigi2007
✓
✓
✓
✓ http://iddy.jp/profile/snoozer05

http://rubyist_level.jitor.net/

http://rubyist_level.jitor.net/

http://noplans.org/product/t-shirt/

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Ruby

Ruby
✓
✓ http://www.ruby-lang.org/ja/
✓
✓
✓
✓ A Programmerʼs Best Friend

Ruby
✓
- http://www.ruby-lang.org/ja/install.cgi
✓
- http://www.ruby-lang.org/ja/man/
✓
- http://www.ruby-lang.org/ja/man/

Ruby
✓ PHPer Ruby
- http://www.slideshare.net/masuidrive/
ruby-90109
✓ Java Ruby
- http://www.kbmj.com/tech/index.php?
itemid=25

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Ruby

Ruby
✓ Ruby
✓ “From Sapporo, With Love For Ruby.”
✓ Ruby @
✓ RubySapporoNight ←
✓ @
✓ Ruby&Rails

http://ruby-sapporo.org/

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http://www.apple.com/jp/macosx/

“One of the most exciting features for me as a
Rubyist is the inclusion of a well Ruby
installation.” - Chad Fowler
http://www.chadfowler.cm/2007/10/28/
ruby-on-leopard

Ruby and Leopard
✓ Ruby : 1.8.6 p36
✓ RubyGems : 0.9.4
✓ Ruby on Rails : 1.2.3
✓ RubyCocoa : 1.0.0
✓ XCode and Interface Builder
✓ Capistrano, Mongorel

http://tarc.macosforge.org/projects/ruby/wiki/
WhatsNewInLeopard

“Apple’s latest OS ships with an improved
Ruby, but it’s not an un-crippled Ruby - it’s just
a less-crippled Ruby.” - Giles Bowkett
http://gilesbowkett.blogspot.com/2007/10/
apples-ruby-communities-not-features

“Apple’s latest OS ships with an improved
Ruby, but it’s not an un-crippled Ruby - it’s just
a less-crippled Ruby.” - Giles Bowkett
http://gilesbowkett.blogspot.com/2007/10/
apples-ruby-communities-not-features

“Apple’s latest OS ships with an improved
Ruby, but it’s not an un-crippled Ruby - it’s just
a less-crippled Ruby.” - Giles Bowkett
http://gilesbowkett.blogspot.com/2007/10/
apples-ruby-communities-not-features

✓
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✓ Leopard Ruby
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Ruby on Rails
ActiveRecord

ActiveRecord

ActiveRecord

Rails

Rails
MVC M

ORM
Object / Relational Mapping

“
RDB
ORM RDB
RDB
” - IT

Active Record
“An object that wraps a row in a database table
or view, encapsules the database access, and
adds domain logic on that data.”

ActiveRecord
✓ Rails
✓ MVC M
✓ O/R
✓ P of EAA ʻActive Recordʼ
✓ RDB Ruby

ActiveRecord

AR

DB

ORM

AR::Base

(CRUD)

CRUD

CRUD

CRUD

CRUD

CRUD

DSL

1 1

One-to-One
has_one
user = User.find(:first)
user.profile
user.profile.nil?
user.create_profile(:firstname => “foo”)
belongs_to
prof = Profile.find(:first)
prof.create_user(:login => “snoozer.05”)
prof.user.nil?
prof.user = user

1

One-to-Many
has_many
apple_store = Site.find(:first)
apple_store.events
apple_store.events.create(:name => “RSN”)
apple_store.events << event
belongs_to
rsn = Event.find(1)
rsn.site.nil?
rsn.site = apple_store

1 *
* 1

Many-to-Many
has_many
user.register_events
user.register_events.nil?
user.register_events << event
has_many
event.members
event.members.nil?
event.members << user

RDB

AR
✓ DB
✓ CRUD
✓
✓
✓
✓

AR

created_at, created_on

updated_at, updated_on

type
STI

acts_as_paranoid
http://ar-paranoid.rubyforge.org/

“delete_at”
datetime

AR::Observer
Observer

acts_as_tree
http://wiki.rubyonrails.org/rails/pages/ActsAsTree

“parent_id”

acts_as_list

Composite Primary Keys Plugin
http://compositekeys.rubyforge.org

AR

http://d.hatena.ne.jp/mrkn/20071010

Lolcats 'n' Funny Pictures

AR
Rails

Ruby on Rails
ActiveRecord

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Ruby @
✓ 2007 11 17
✓
✓
✓
✓C Ruby
✓
✓ ... (ry

RubySapporoNight vol.4
✓ 2007 11 28
✓
✓
✓
✓ Ruby on Rails
✓

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✓ Ruby
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✓