Ruby on Rails
BY thegiive
( License by CC 2.0 )

About me
• ID : thegiive
• SocialPicks.com
• Ruby on Rails
• Blog : http://lightyror.thegiive.net/
• Email : thegiive at gmail . com

Outline
• Ruby on Rails
• Ruby on Rails
• Rails
• Active Record
•
• Active Record

Ruby on Rails
A
95.00
71.25
47.50
C
B
23.75
0
6 7 8 9 10 11 12 1 2 3 4

A
95.00
71.25
47.50
23.75
0
6 7 8 9 10 11 12 1 2 3 4

Before Rails day
10%
• PHP
•
• 90%

After Rails day
Survey Bloging
• 2
PHP 10%
Project
20% 40%
•
• 30%

Phone time project
• “
“
• 20 code
• 3

B
95.00
71.25
47.50
23.75
0
6 7 8 9 10 11 12 1 2 3 4

•
•
•
•
•

Coding RD
Rails
PHP
0 25 50 75 100

C
95.00
71.25
47.50
23.75
0
6 7 8 9 10 11 12 1 2 3 4

PS2 10

After PS2 Day
Blog Survey
PS2
• 20%
• 30%
Project
•
30% 10%
10%

Ruby on Rails
• MVC
• Ruby
• DHH Basecamp
Project

• David Heinemeier Hansson
• DHH
• 26
DHH Blog

How Hot is Rails
• Rails 2006 400
150 24
• 2005 Ruby on Rails
1500% 2006 700%
• Ruby 26 13

Rails Clone

•

JAVA (Spring/Hibernate) Rails
4 (20 / )4 (5 /)
3293 1164
1161 113
Class/method 62/549 55/126
Justin Gehtland Blog

• RD
•
•
• Web Site
• Performance

(
•
•
• PS2

• Justin Gehtland JAVA : Rails = 3.5 : 1
• Java : Rails = 25 : 1
• Proc.net PHP : Rails = 10 : 1
• JavaEye JAVA : Rails = 10 : 1
• PHP : Rails = 8 : 1
http://lightyror.blogspot.com/2006/10/rails.html

Rails

• ORM
• Convention over Configuration
• Don’t Repeat Yourself
• Domain Specific Language

ORM
• Object Relational Mapping
•
• Propel Hibernate Active Record ...

Convention over Configuration
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping
•
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.d
<hibernate-mapping>
<class name="test.hibernate.Order" table="orders">
<id name="id" type="string" unsaved-value="null" >
<column name="id" sql-type="integer" not-null="true"/>
<generator class="native"/>
• </id>
<key column="order_id" />
<one-to-many class="test.hibernate.OrderItem" />
</set>
</class>
</hibernate-mapping>

DRY
• Don’t Repeat Yourself
• View Helper Partial DRY
• Controller Module Lib DRY

Domain Specific Language
• Ruby DSL
• Rails DB-Driven Web App DSL
• has_one , has_many , HABTM
• symbol ( :abc )

Migration
create_table :stores do |t|
t.column :name , :string
t.column :info , :text
t.column :open_time , :string
t.column :user_id , :integer
t.column :created_at , :datetime
t.column :updated_at , :datetime
end

Active Record
• Rails
• ORM
• Convention over Configuration
• 1:1 1:m n:m
• MySQL SQL Server Oracle
SQLite

ORM Example
a = People.new
People
id int a = People.find(1)
name varchar
phone varchar a.name = ‘David’
address text a.destroy
sex enum
a.save

Relation Table Example
Article
People
id int id int
name varchar person_id int
phone varchar title varchar
address text
content text
sex enum
created_at datatime

Relation ORM
a = People.find(1)
a.articles
a.articles.find(:first)
a.articles << Article.new(...)
Person a

•
•
• Legacy
• Template

“
” JAVA
Python Perl

Rails
• ..... ....
• DHH Ruby
• Ruby DSL
•
•

“ 20%
JAVA
300%
”
From Beyond Java

Ruby ?
•
Ruby Programmming
• Ruby is not Rails
• Rails Ruby 60%

City Neighbor
id int city_id int
neighbor_id int
name varchar
“ “ ”
“ ” “

• city n:m neighbor
join table
•
•

function (A B {
if( B A ){
return ‘ ’
}else{
for ( A C {
if( B C {
return ‘ ’
}
}
return ‘ ’
Pseudo Code
}
}

def check ( city_a , city_b )
if ( city_a.neighbors.include?(city_b)
return ‘ ’
else
city_a.neighbors.each do | neighbor_of_a |
if (neighbor_of_a.neighbors.include?(city_b) )
return ‘ ’
end
end
return ‘ ’
Rails Code
end
end

• Ubi
• Topic
•

RoR * 1hr
RoR in pratice * 3hr

•
• 10
•
• Demo Code

•
•
• Inspire by

Code Stats
• Code 270
• 230
• 40
• 80%

•
• Tag
• Urmap
• Search
•

Outline
•
•
•
•
• Urmap API
• Tag

Live Demo RoR
•
•
• Contagions

Demo

• Live Demo With Subversion
• reversion
• May the force be with me

Stores
Users id int
id int user_id int
Comments
id int
user_id int
store_id int

code
• svn Committed revision 9.

•

• Yullio Mollio plugin for Rails
• layout
• script/generate layout_yullio stores sidebar
• Rails

code
• svn Committed revision 10.
• sidebar : 11
• Store Layout : 12

• Plugin
• session
• before_filter

•
•

code
• User : 13
• : 14

• Rmagick
•
•

file_column
• Base on Rmagick
• Rails
• Upload

code
• : 15

• Search Engine + Web API
• Solr + act_as_solr
• Ferret + ast_as_ferret

SQL Search
• Like ‘%....%’
• SQL code
• Rails SQL

code
• Committed revision 16.
• partial template

Urmap API
•
•
• UrMap API

•
• “ Hello 25 121
“
• GPS
•

...

Cron Script
• ActiveRecord
• Ruby HTTP POST

code
• Commit reversion 17

Table Relationship
• Active Record
• console relationship

code
• Commit reversion 18
• ruby script/console

Comment
•
•

code
• Commit reversion 19

Tag
• ast_as_taggable
• model.tag_with('red library book')
• model.tags

code
• Committed revision 20.
• Committed revision 21

•
•
•

?

?

Q &A