The document discusses Ruby on Rails, including its history, philosophy, and conventions like MVC, TDD, and REST. It covers common Rails components like models, views, controllers, validations, associations, and migrations. It also mentions the large Rails community and conferences like RailsConf and Rails Summit Latin America.

1. Repensando o Desenvolvimento Web com
Ruby on Rails

2. Rails

3. Comunidade

4. Filosofia

5. DanteRegis.com
@danteregis
Admin de Redes - TJ/SE

6. DanteRegis.com
@danteregis
Admin de Redes - TJ/SE
http://slideshare.net/danteregis

7. Você não vai aprender
Ruby on Rails aqui

8. framework

10. David Heinemeier Hansson
2004

11. 37signals

12. 1400+
desenvolvedores

13. jul/2004 0.5
dez/2005 1.0
mar/2006 1.1
jan/2007 1.2
dez/2007 2.0
jun/2008 2.1
nov/2008 2.2
mar/2009 2.3
algum dia (em 2009?) 3.0

14. Empregos
(fonte: indeed.com)

16. MVC

17. opiniated

18. eXtreme Programming

19. TDD

20. REST

21. modularização

22. DRY

23. Convention
over
Configuration

24. KISS

26. script/console

27. Model

28. Model

29. Model

30. Model
id: integer
name: string
price: float
category_id: integer
stock: integer
created_at: datetime
updated_at: datetime

31. Model
id: integer
name: string
x = Product.new
price: float
category_id: integer
stock: integer
created_at: datetime
updated_at: datetime

32. Model
id: integer
name: string
x = Product.new
price: float x.name = "Pão Jacó"
category_id: integer
stock: integer
created_at: datetime
updated_at: datetime

33. Model
id: integer
name: string
x = Product.new
price: float x.name = "Pão Jacó"
category_id: integer x.stock = "100
stock: integer
created_at: datetime
updated_at: datetime

34. Model
id: integer
name: string
x = Product.new
price: float x.name = "Pão Jacó"
category_id: integer x.stock = "100
stock: integer x.price = 0.15
created_at: datetime
updated_at: datetime

35. Model
id: integer
name: string
x = Product.new
price: float x.name = "Pão Jacó"
category_id: integer x.stock = "100
stock: integer x.price = 0.15
created_at: datetime x.save
updated_at: datetime

36. Model

37. Model
INSERT INTO `products` COLUMNS (`name`, `price`,
`stock`) VALUES ("Pão Jaco", 0.15, 100);

38. Model

39. Model
Product.first

40. Model
Product.first
Product.find_all_by_category_id(10)

41. Model
Product.first
Product.find_all_by_category_id(10)
Product.find_or_create_by_name("Margarina")

42. Model
Product.first
Product.find_all_by_category_id(10)
Product.find_or_create_by_name("Margarina")
Product.count

43. Model
Product.first
Product.find_all_by_category_id(10)
Product.find_or_create_by_name("Margarina")
Product.count
Product.average('price')

44. validations

45. associations

46. instance methods

47. Model
class Product < ActiveRecord::Base
end

48. Model
class Product < ActiveRecord::Base
end

49. Model
class Product < ActiveRecord::Base
belongs_to :category
end

50. Model
class Product < ActiveRecord::Base
belongs_to :category
validates_presence_of :name
end

51. Model
class Product < ActiveRecord::Base
belongs_to :category
validates_presence_of :name
validates_numericality_of :stock
end

52. Model
class Product < ActiveRecord::Base
belongs_to :category
validates_presence_of :name
validates_numericality_of :stock
def consume!
stock -= 1
save
end
end

54. p = Product.new(:stock => "xxxxx")

55. p = Product.new(:stock => "xxxxx")
p.save

56. p = Product.new(:stock => "xxxxx")
p.save
#=> false

57. p = Product.first
p.category
p.category.name = "Mudei o nome"
p.category.save

58. has_many

59. class Category < ActiveRecord::Base
has_many :products
end

60. cat.products
cat.products.new
cat.products.first

61. named scope

62. class Product < ActiveRecord::Base
named_scope :low_stock, :conditions => ['stock <= 10']
end

64. Product.low_stock
#=> [.....]

65. Product.low_stock
#=> [.....]
category.products.low_stock
#=> [...]

66. SQL?

67. migrations

68. controle de versão

69. do banco de dados!

70. sem SQL!

72. class AddQuantityToCartProduct < ActiveRecord::Migration

73. class AddQuantityToCartProduct < ActiveRecord::Migration
def self.up
add_column :cart_products, :quantity, :integer
end

74. class AddQuantityToCartProduct < ActiveRecord::Migration
def self.up
add_column :cart_products, :quantity, :integer
end
def self.down
drop_column :cart_products, :quantity
end
end

75. com SQL!

76. > 90%
experiência pessoal

77. ActionController

78. session

79. render

80. filters

81. class ApplicationController < ActionController::Base
before_filter :check_login
def check_login
render :text => "acesso negado!"
end
end

82. flash

83. flash[:notice] = "Você logou no sistema"

84. cookies

85. respond_to

86. ActionView

87. erb

88. haml

89. erb

90. form_tag
form_for

91. <div>
<span><%= flash[:notice] %></span>
</div>
<div>
<% form_tag do %>
<p>
Usuário: <%= text_field_tag 'username' %>
</p>
<p>
Senha: <%= password_field_tag 'password' %>
</p>
<p>
<%= submit_tag 'Entrar' %>
</p>
<% end %>
</div>

92. Tempo para falar mal
de certas “soluções”

93. Fim do tempo para
falar mal de certas
“soluções”

94. Comunidade

95. RailsConf
http://railsconf.com

101. Rails Summit Latin
America
http://railssummit.com.br

102. 13 e 14 de outubro
São Paulo/SP

103. Aldo França

104. Great Blogs ‘n People

105. Akita on Rails
http://akitaonrails.com

106. Carlos Brando
http://nomedojogo.com

107. Ozéias Sant’ana
http://railsbox.org

108. Bruno Miranda
http://brunomiranda.com

109. Ruby Onda
http://rubyonda.com

110. Nando Vieira
http://simplesideias.com.br

111. PeepCode
http://peepcode.com

112. RailsCasts
http://railscasts.com

113. http://slideshare.net/danteregis

114. dante@danteregis.com