(株)ウェブキャリア　2007/10/18 のセミナー資料 DLはこちらからどうぞ http://ko.meadowy.net/~nay/ruby/2007/seminar_ohba_2007_11_26-1.pdf

1. Ruby on Rails
y.ohba@everyleaf.com

2. ... → C++ → Java(7 ) → Ruby(1.5 )
Award on Rails 2006

3. orz

5. Award on Rails 2006
• Web
•
•
http://www.kozuchi.net

6. Ruby on Rails 100%
EC
SNS

7. Ruby on Rails
http://www.everyleaf.com

8. Ruby on Rails
/

9. Ruby on Rails
Java

10. Hello, RoR
Scaffold
CRUD
Session, Request

11. Rails
Ruby
etc...

12. API
Rails , Plugin
Ruby

13. REST Hash Array
ActiveRecord
Module Mix-in DRY
Ajax
Plugin

14. - IDE, SVN, Trac, Wiki, UML

16. Java Ruby
0
||=
Hash Array

17. Ruby - 0
s=0
if s
p "0 "
end
nil false
0

18. nil
if value != nil
...
if value
...
unless value.nil?
...

19. 1
if !id
raise "no id"
end
Java
raise "no id" if !id
raise "no id" unless id
unless

20. Hash Array
API

21. Hash
hash = {key => value, key => value, ...}
value = hash[key]
obj.foo( {key => value, key => value} )
obj.foo(key => value, key => value)
{}

22. Array
admin= nil
for element in @array
if element.name == "admin"
admin = element
break
end
end
admin = @array.detect{|e| e.name == "admin" }

23. public, protected, private Java
Module

24. ||=
name ||= " "
name = name || " "
ex) value += 1

25. private, protected, public
Ruby
private
Java
Ruby
protected
Java
Java
public
Ruby
Java

26. Ruby
Java

27. item.save
item
self.save
self
save
private

28. RoR
- public
- private
protected
ActiveRecord

29. class Foo
def self.foo
p ‘foo’
end
end
> Foo.foo
> f = Foo.new
> f.class.foo

30. ActiveRecord

31. :joins :include

32. Acts as List

33. class
table
class class

35. Item, Book, Dvd
items
Item
items
Book Dvd

36. type

37. type
items
Item
type: varchar(30) "Book"
Book Dvd
type

38. Employee belongs_to :work_place

39. has_many :employees
has_one :employee
employees Employee Office offices
office_id
belongs_to :office

40. has_many :employees, :as => work_place
Office offices
work_place_id
work_place_type
employe Work
es Employee Place Factory factories
belongs_to :work_place, :polymorphic => true

41. work_place_id,
work_place_type
xxx_id, xxx_type xxx
id type( )
xxx_type
has_many :through

42. (xxx_)type
→ Up

43. ActiveRecord
Save

44. #
def after_update
children.each {|c| c.save!}
end

45. -
Controller
Model
Rails API

46. :joins :include
employees = Employee.find(:all,
:select => "employee.*",
:conditions => ["offices.prefectue_id = ?",
prefecture_id],
:joins => "left join offices on
employees.office_id = offices.id")
:joins SQL join

47. :joins :include (2)
class Employee < ActiveRecord::Base
belongs_to :office
end
employee = Employee.find(@id,
:include => :office)

48. Rails API
validates_presence_of etc...
= errors
def validate
errors.add_to_base(“ ”) unless quantity % 2 == 0
end

49. API
:scope, :allow_nil
ActiveHeart Plugin
GetText , Scpecial Generator

50. Acts as List
has_many

51. Acts as List
position
class Note < ActiveRecord::Base
has_many :lines, :order => "position"
end
class Line < ActiveRecord::Base
belongs_to :note rails 2.0
acts_as_list :scope => :note
end

52. has_many
)

53. class Employee < ActiveRecord::Base
belongs_to :office, :counter_cache => true
end
★offices employees_count
★ 0

54. ActiveRecord
API
Association (has_many
)
http://api.rubyonrails.org/

55. REST
Controller URL
entries/new_comment/1
entries/1/comments/new
entries/1/comments/3

56. REST
Controller
routes.rb
Filter
@book

57. rails 2.0
REST

59. acts_as_authenticated plugin
before_filter
before_filter :load_user
private
def load_user
@user = User.find(session[:user_id])
end

60. @entries = Entry.secure_find(@user, options)

61. create save
update
validates_association
:dependent => :destroy

62. acts_as_paranoid

63. file_column
RMagick
I/F

64. GetText (gem
)
Globalize

65. acts_as_taggable
SpecialGenerator
Scaffold

66. Rails

67. Ruby DSL
DSL =
has_many :employees
AR
Rails
= DSL

68. String
under_score, pluralize ...
acts_as_paranoid

69. Module Mix-in

70. Java
Ruby
class Object
def yeah
p ‘yeah!’
end
end

71. Module Mix-in
Module
module Human
def age(date)
# ( )
end
end
include
class Employee < ActiveRecord::Base
include Human
end

72. /
ActiveRecord::Base
Office Factory Module
include include
WorkPlace

73. include
module WorkPlace
#
def self.included(base)
base.has_many :employees,
:as => :work_place
end
end

74. Module
module WorkPlace
module ClassMethods
def foo
p ‘foo’
end
end
def self.included(base)
base.extend(ClassMethods)
end
end

75. private
obj.__send__(:himitsu)
※Ruby1.9

76. clazz.__send__(:define_method, :yeah) {
p ‘yeah!’
}

77. (^o^)/

78. init.rb
Module include
→ DSL
) acts_as_paranoid

79. Module Helper
DSL

83. What

84. (^o^)/

85. Ruby on Rails

87. Award on rails 2007
BookScope
http://ko.meadowy.net/bookscope/

88. BookScope
Amazon WebService
.org

89. 10/19( ) !!
http://rails.drecom.jp/vote
BookScope
m(_ _)m