Edted 2010 Ruby on Rails

1. A apresentação já vai começar ... Saturday, April 10, 2010

2. Ruby on Rails Saturday, April 10, 2010

3. AkitaOnRails.com Saturday, April 10, 2010

4. ~ 50 min ~ 110 slides Saturday, April 10, 2010

5. www.slideshare.net/akitaonrails fabioakita@gmail.com Saturday, April 10, 2010

6. Saturday, April 10, 2010

7. Ruby on Rails 2.3.x Ruby on Rails 3.0-pre Ruby 1.8.x Ruby 1.9.x Saturday, April 10, 2010

11. “Matz” 1993 Saturday, April 10, 2010

13. “DHH” 2004 Saturday, April 10, 2010

19. Charles Nutter 2006 Saturday, April 10, 2010

22. “Tornar as coisas simples fáceis e as coisas complexas possíveis” Filoso a Ruby Saturday, April 10, 2010

24. Código que gera Código Convention over Con guration “Don’t Repeat Yourself” Extreme Programming Saturday, April 10, 2010

28. Restful Resources Unicode, Time Zone, i18n Segurança (XSS, CSRF, Injection) Saturday, April 10, 2010

31. Templates ERB, HAML HTTP Basic, HTTP Digest, Autenticação Authlogic, Devise MySQL, PostgreSQL, Oracle, Bancos de Dados MongoDB, CouchDB ActiveRecord, DataMapper, ORMs MongoMapper, Sequel Prototype, jQuery, Javascript SproutCore Apache 2, NginX, Web Servers Lighty, Litespeed Saturday, April 10, 2010

53. Model class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category validates_presence_of :name validates_presence_of :master_price validates_presence_of :description make_permalink :with => :name, :field => :permalink end Saturday, April 10, 2010

54. Views ERB <div id="product-listing"> <%= breadcrumbs(@taxon) %> <br/> <%= render :partial => "shared/products.html.erb", :locals => {:products => @products, :taxon => @taxon } %> </div> <% content_for :sidebar do %> <td id="shop-by-col" valign="top"> <%= render :partial => "shared/taxonomies" %> </td> <% end %> <%= render :partial => 'shared/paginate', :locals => {:collection => @products, :options => {}} unless @products.empty? %> Saturday, April 10, 2010

55. Controller class UsersController < Spree::BaseController resource_controller before_filter :initialize_extension_partials actions :all, :except => [:index, :destroy] show.before do @orders = Order.checkout_completed(true) .find_all_by_user_id(current_user.id) end create.after { self.current_user = @user } create.response do |wants| wants.html { redirect_back_or_default(products_path) } end end Saturday, April 10, 2010

56. “Beautiful Code” Saturday, April 10, 2010

57. @Transient public BigDecimal getTotal() //$Id: Booking.java 5579 2007-06-27 00:06:49Z gavin $ { package org.jboss.seam.example.booking; return hotel.getPrice().multiply( new BigDecimal( getNights() ) ); } import java.io.Serializable; import java.math.BigDecimal; @Transient import java.text.DateFormat; public int getNights() import java.util.Date; { return (int) ( checkoutDate.getTime() - checkinDate.getTime() ) / import javax.persistence.Basic; 1000 / 60 / 60 / 24; import javax.persistence.Entity; } import javax.persistence.GeneratedValue; import javax.persistence.Id; @Id @GeneratedValue import javax.persistence.ManyToOne; public Long getId() import javax.persistence.Temporal; { import javax.persistence.TemporalType; return id; import javax.persistence.Transient; } public void setId(Long id) import org.hibernate.validator.Length; { import org.hibernate.validator.NotNull; this.id = id; import org.hibernate.validator.Pattern; } import org.jboss.seam.annotations.Name; @NotNull @Entity @Basic @Temporal(TemporalType.DATE) @Name("booking") public Date getCheckinDate() public class Booking implements Serializable { { return checkinDate; private Long id; } private User user; public void setCheckinDate(Date datetime) private Hotel hotel; { private Date checkinDate; this.checkinDate = datetime; private Date checkoutDate; } private String creditCard; private String creditCardName; @ManyToOne @NotNull private int creditCardExpiryMonth; public Hotel getHotel() private int creditCardExpiryYear; { private boolean smoking; return hotel; private int beds; } public void setHotel(Hotel hotel) public Booking() {} { this.hotel = hotel; public Booking(Hotel hotel, User user) } { this.hotel = hotel; @ManyToOne @NotNull this.user = user; public User getUser() } { return user; } Saturday, April 10, 2010

58. public int getBeds() public void setUser(User user) { { return beds; this.user = user; } } public void setBeds(int beds) @Basic @Temporal(TemporalType.DATE) { @NotNull this.beds = beds; public Date getCheckoutDate() } { @NotNull(message="Credit card name is required") return checkoutDate; @Length(min=3, max=70, message="Credit card name is required") } public String getCreditCardName() public void setCheckoutDate(Date checkoutDate) { { return creditCardName; this.checkoutDate = checkoutDate; } } public void setCreditCardName(String creditCardName) @NotNull(message="Credit card number is required") { @Length(min=16, max=16, message="Credit card number must 16 digits long") this.creditCardName = creditCardName; @Pattern(regex="^d*$", message="Credit card number must be numeric") } public String getCreditCard() { public int getCreditCardExpiryMonth() return creditCard; { } return creditCardExpiryMonth; } public void setCreditCard(String creditCard) { public void setCreditCardExpiryMonth(int creditCardExpiryMonth) this.creditCard = creditCard; { } this.creditCardExpiryMonth = creditCardExpiryMonth; } @Transient public String getDescription() public int getCreditCardExpiryYear() { { DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM); return creditCardExpiryYear; return hotel==null ? null : hotel.getName() + } ", " + df.format( getCheckinDate() ) + " to " + df.format( getCheckoutDate() ); public void setCreditCardExpiryYear(int creditCardExpiryYear) } { this.creditCardExpiryYear = creditCardExpiryYear; public boolean isSmoking() } { return smoking; @Override } public String toString() { public void setSmoking(boolean smoking) return "Booking(" + user + ","+ hotel + ")"; { } this.smoking = smoking; } } Saturday, April 10, 2010

59. class Booking < ActiveRecord::Base belongs_to :hotel belongs_to :user validates_presence_of :hotel validates_presence_of :user validates_presence_of :credit_card validates_presence_of :credit_card_name validates_length_of :credit_card, :within => 16..16 validates_format_of :credit_card, :with => /^d*$/ validates_length_of :credit_card_name, :within => 3..70 def total hotel.price * nights end def nights ((checkout_date - checkin_date) / 1.day).round end def to_s "Booking(#{user},#{hotel})" end end Saturday, April 10, 2010

60. class Booking < ActiveRecord::Base belongs_to :hotel belongs_to :user validates_presence_of :hotel validates_presence_of :user validates_presence_of :credit_card validates_presence_of :credit_card_name validates_length_of :credit_card, :within => 16..16 validates_format_of :credit_card, :with => /^d*$/ validates_length_of :credit_card_name, :within => 3..70 def total hotel.price * nights end def nights ((checkout_date - checkin_date) / 1.day).round end def to_s "Booking(#{user},#{hotel})" end end Saturday, April 10, 2010

61. class CreateBookings < ActiveRecord::Migration def self.up create_table :bookings do |t| t.references :user t.references :hotel t.datetime :checkin t.datetime :checkout t.string :credit_card t.string :credit_card_name t.integer :credit_card_expiry_month t.integer :credit_card_expiry_year t.boolean :smoking t.integer :beds t.timestamps end end def self.down drop_table :bookings end end Saturday, April 10, 2010

64. 190 vs 40 Saturday, April 10, 2010

66. “Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em 20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante, facilitou a di culdade que tinham em manutenção. Eles também nalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores. Uma vez completo e otimizado, o site deles agora é mais rápido que antes.” http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails Saturday, April 10, 2010

70. Ferramentas Saturday, April 10, 2010

71. Gitorious Repositórios Github Integração Integrity Contínua Cruise Control Chef Deployment Puppet Monitoramento New Relic Saturday, April 10, 2010

83. Comunidade Saturday, April 10, 2010

106. O que dizem por aí ... Saturday, April 10, 2010

107. Ruby é Lento Saturday, April 10, 2010

108. Existem mentiras, mentiras malditas e estatísticas. Saturday, April 10, 2010

112. x mais lento que C++ Saturday, April 10, 2010

113. x mais lento que C++ 0 32.5 65 97.5 130 Python 2 Ruby 1.9 JRuby Perl Python 3 PHP Ruby 1.8 Saturday, April 10, 2010

114. Homepage: 331 ms Saturday, April 10, 2010

115. Homepage: 331 ms Total: 5.45 s Saturday, April 10, 2010

117. Performance != Escalabilidade Saturday, April 10, 2010

118. Rails não Escala Saturday, April 10, 2010

121. Blaine Cook http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter Saturday, April 10, 2010

122. Para colocar as coisas em perspectiva, o Friendster foi escrito em Java e eles mudaram para PHP. MySpace foi escrito em ColdFusion e eles mudaram para ASP.NET. Blaine Cook http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter Saturday, April 10, 2010

123. Para colocar as coisas em perspectiva, o Friendster foi escrito em Java e eles mudaram para PHP. MySpace foi escrito em ColdFusion e eles mudaram para ASP.NET. Quando as pessoas caem em problemas de escalabilidade, normalmente acham que a linguagem é o problema, mas eu acho que isso raramente é a realidade. Blaine Cook http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter Saturday, April 10, 2010

124. “O The New York Times usou Ruby on Rails para agregar, analizar e mostrar os resultados das eleições em quase tempo real em um de seus sites mais acessados de todos os tempos.” http://www.computerworld.com.au/article/268003/ruby_rails_rolls_into_enterprise?fp=16&fpid=1 Saturday, April 10, 2010

125. “O The New York Times usou Ruby on Rails para agregar, analizar e mostrar os resultados das eleições em quase tempo real em um de seus sites mais acessados de todos os tempos.” http://www.computerworld.com.au/article/268003/ruby_rails_rolls_into_enterprise?fp=16&fpid=1 Saturday, April 10, 2010

126. Browser Web Server MySQL Saturday, April 10, 2010

127. Browser Varnish/HAProxy Web Server MySQL Saturday, April 10, 2010

128. Browser Varnish/HAProxy Web Server Memcached MySQL Saturday, April 10, 2010

129. Browser Varnish/HAProxy Web Server Memcached MySQL CouchDB/MongoDB Saturday, April 10, 2010

131. Outros Mitos? Saturday, April 10, 2010

133. Mais Produtivo “Melhor” Anti-legado Saturday, April 10, 2010

134. Sempre se Lembre Poderíamos contratar um Macaco Treinado para fazer seu Trabalho! Saturday, April 10, 2010

139. Agilidade Saturday, April 10, 2010

141. “Rápido” Metodologias Saturday, April 10, 2010

145. Robert C. Martin Saturday, April 10, 2010

147. Código Limpo Saturday, April 10, 2010

149. Test Driven Development Saturday, April 10, 2010

151. describe BankAccount do before :each do @bank_account = BankAccount.new :balance => 250 end it "should not be valid" do @bank_account.should be_valid end it "should transfer funds successfully" do @bank_account.should_receive(:transfer) .with_args(:amount => 100) .and_return(true) @bank_account.execute_transaction(:amount => 100) @bank_account.balance.should == 150 end end Saturday, April 10, 2010

156. Funcionalidade: Adição Para evitar erros bobos Como um péssimo matemático Eu quero saber como somar dois números Cenário: Adicionar dois números Dado que eu digitei 50 na calculadora E que eu digitei 70 na calculadora Quando eu aperto o botão de soma Então o resultado na calculadora deve ser 120 Saturday, April 10, 2010

157. Funcionalidade: Adição Para evitar erros bobos Como um péssimo matemático Eu quero saber como somar dois números Cenário: Adicionar dois números Dado que eu digitei 50 na calculadora E que eu digitei 70 na calculadora Quando eu aperto o botão de soma Então o resultado na calculadora deve ser 120 Saturday, April 10, 2010

160. Não é mais demorado? Saturday, April 10, 2010

161. Produtividade Cowboy Proﬁssional Saturday, April 10, 2010

162. Produtividade Cowboy Proﬁssional 70.00 52.50 Produtividade 35.00 17.50 0 1 2 3 4 5 6 7 8 Tempo Saturday, April 10, 2010

172. 237 Equipes 137 Finalizadas Saturday, April 10, 2010

174. Empreendedorismo Código e “Forma” Ciclo de Vida de Projetos Comunidade Open Source Saturday, April 10, 2010

178. Pro ssionalismo Saturday, April 10, 2010

179. Obrigado! akitaonrails.com Saturday, April 10, 2010

Edted 2010 Ruby on Rails

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