rails3 @ rsonrails - 2010.08.21

Rails 3 Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rails 3 ID blog twitter Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Quem sou eu? • Carlos Antonio da Silva • Desenvolvedor Ruby e Rails há mais de 2 anos • Engenheiro da Plataforma Tecnologia a 1 ano Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Desenvolvimento de aplicações em Rails Coaching em Consultoria Rails e Agile Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rails 3 Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Como tudo começou? Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Vantagens do Rails 3 Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Vantagens do Rails 3 Performance Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Vantagens do Rails 3 Modularidade Performance Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Vantagens do Rails 3 Agnosticismo Modularidade Performance Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Arquitetura Rails ActionDispatch ActiveSupport Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Arquitetura Todo o resto são Railties! Rails ActionDispatch ActiveSupport Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Arquitetura Todo o resto são Railties! ActiveRecord Rails ActionView ActionDispatch outros... ActiveSupport ActionController ActionMailer Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Como o Rails 3 muda o modo como desenvolvemos? Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rails command Rails 2.3 Rails 3 rails blog rails new blog Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rails command Rails 2.3 Rails 3 ruby script/server rails server ruby script/console rails console ruby script/generate rails generate ruby script/dbconsole rails dbconsole Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rails command Rails 3 Shortcuts! rails server rails s rails console rails c rails generate rails g rails dbconsole rails db Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

blog/conﬁg.ru require ::File.expand_path(../config/environment, __FILE__) run Blog::Application Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

blog/conﬁg/application.rb require File.expand_path(../boot, __FILE__) require rails/all Bundler.require(:default, Rails.env) if defined?(Bundler) module Blog class Application < Rails::Application config.encoding = "utf-8" config.filter_parameters += [:password] end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

blog/conﬁg/application.rb require File.expand_path(../boot, __FILE__) require rails/all Bundler.require(:default, Rails.env) if defined?(Bundler) module Blog uma Rack App! class Application < Rails::Application config.encoding = "utf-8" config.filter_parameters += [:password] end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

O que é uma Rack App? Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

O que é uma Rack App? Qualquer objeto que responde ao método call, retornando um array com três parâmetros: o response status, os headers e o body, que por sua vez deve responder ao método each. Rack App! lambda { |env| [ 200, {“Content-Type” => “plain/text”}, ["Hello!"] ] } Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

blog/conﬁg/application.rb require File.expand_path(../boot, __FILE__) require rails/all Bundler.require(:default, Rails.env) if defined?(Bundler) module Blog uma Rack App! class Application < Rails::Application config.encoding = "utf-8" config.filter_parameters += [:password] end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

blog/conﬁg/application.rb require File.expand_path(../boot, __FILE__) require rails/all Bundler.require(:default, Rails.env) if defined?(Bundler) module Blog class Application < Rails::Application config.encoding = "utf-8" config.filter_parameters += [:password] end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

blog/conﬁg/boot.rb require rubygems # Set up gems listed in the Gemfile. gemfile = File.expand_path(../../Gemfile, __FILE__) begin ENV[BUNDLE_GEMFILE] = gemfile require bundler Bundler.setup rescue Bundler::GemNotFound => e STDERR.puts e.message STDERR.puts "Try running `bundle install`." exit! end if File.exist?(gemfile) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Bundler Router ActionMailer ActiveModel ActiveRecord Responders Unobtrusive Javascript XSS Protection Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Biblioteca para gerenciamento de dependências Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rubygems Resolução de dependências rsrails$ gem dependency actionpack -v="2.3.5" Gem actionpack-2.3.5 activesupport (= 2.3.5, runtime) rack (~> 1.0.0, runtime) rsrails$ gem dependency thin Gem thin-1.2.7 daemons (>= 1.0.9, runtime) eventmachine (>= 0.12.6, runtime) rack (>= 1.0.0, runtime) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rubygems Resolução de dependências Gems instaladas do rack: require "rubygems" * rack (1.0.1) require "thin" * rack (1.1.0) gem "actionpack", "2.3.5" Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rubygems Resolução de dependências Gems instaladas do rack: require "rubygems" * rack (1.0.1) require "thin" * rack (1.1.0) gem "actionpack", "2.3.5" BOOM!!! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rubygems Resolução de dependências Gems instaladas do rack: require "rubygems" * rack (1.0.1) require "thin" * rack (1.1.0) gem "actionpack", "2.3.5" cant activate rack (~> 1.0.0, runtime) for ["actionpack-2.3.5"], already activated rack-1.1.0 for ["thin-1.2.7"] (Gem::LoadError) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Bundler: Gemﬁle # Gemfile gem "thin" gem "actionpack", "2.3.5" Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Bundler: Gemﬁle # Gemfile gem "thin" gem "actionpack", "2.3.5" rsrails$ bundle list Gems included by the bundle: * actionpack (2.3.5) * activesupport (2.3.5) * daemons (1.0.10) * eventmachine (0.12.10) * rack (1.0.1) * thin (1.2.7) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rubygems $LOAD_PATH Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

} rsrails$ gem list *** LOCAL GEMS *** bundler (0.9.25) rake (0.8.7, 0.8.5) Filesystem rdoc (2.5.8) thor (0.13.6) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

} rsrails$ gem list *** LOCAL GEMS *** bundler (0.9.25) rake (0.8.7, 0.8.5) Filesystem rdoc (2.5.8) thor (0.13.6) # Rubygems gem “rake”, “0.8.5” } Gemﬁle Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

} rsrails$ gem list *** LOCAL GEMS *** bundler (0.9.25) rake (0.8.7, 0.8.5) Filesystem rdoc (2.5.8) thor (0.13.6) # Rubygems gem “rake”, “0.8.5” } Gemﬁle } bundler (0.9.25) rake (0.8.7, 0.8.5) $LOAD_PATH rdoc (2.5.8) thor (0.13.6) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Bundler Lock no $LOAD_PATH Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Esqueci de colocar no conﬁg.gem! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

} rsrails$ gem list *** LOCAL GEMS *** bundler (0.9.25) rake (0.8.7, 0.8.5) Filesystem rdoc (2.5.8) thor (0.13.6) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

} rsrails$ gem list *** LOCAL GEMS *** bundler (0.9.25) rake (0.8.7, 0.8.5) Filesystem rdoc (2.5.8) thor (0.13.6) # Gemfile - Bundler gem “rake”, “0.8.5” } Gemﬁle Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

} rsrails$ gem list *** LOCAL GEMS *** bundler (0.9.25) rake (0.8.7, 0.8.5) Filesystem rdoc (2.5.8) thor (0.13.6) # Gemfile - Bundler gem “rake”, “0.8.5” } Gemﬁle rake-0.8.5 } $LOAD_PATH Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rsrails$ gem list rake (0.8.7, 0.8.5) thor (0.13.6) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rsrails$ gem list rake (0.8.7, 0.8.5) thor (0.13.6) # Gemfile gem "rake" Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rsrails$ gem list rake (0.8.7, 0.8.5) thor (0.13.6) # Gemfile gem "rake" # test_load_path_lock.rb require "rubygems" require "bundler" Bundler.setup require "rake" require "thor" Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rsrails$ gem list rake (0.8.7, 0.8.5) thor (0.13.6) # Gemfile gem "rake" # test_load_path_lock.rb require "rubygems" require "bundler" Bundler.setup Lock no $LOAD_PATH require "rake" require "thor" Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rsrails$ gem list rake (0.8.7, 0.8.5) thor (0.13.6) # Gemfile gem "rake" # test_load_path_lock.rb require "rubygems" require "bundler" Bundler.setup Lock no $LOAD_PATH require "rake" require "thor" rsrails$ ruby test_load_path_lock.rb test_load_path_lock.rb:6:in `require: no such ﬁle to load -- thor (LoadError) from test_load_path_lock.rb:6 Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Packaging System OMG! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Router Nova API Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rotas root Rails 2.3 map.root :controller => "welcome" Rails 3 root :to => "welcome#index" Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rotas comuns Rails 2.3 map.connect "products/:id", :controller=> "catalog", :action => "view" Rails 3 match products/:id => catalog#view Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rotas nomeadas Rails 2.3 map.purchase "products/:id/purchase", :controller => "catalog", :action => "purchase" Rails 3 match "products/:id/purchase" => catalog#purchase, :as => :purchase Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Resources com member e collection Rails 2.3 map.resources :products, :member => { :short => :get, :toggle => :post }, :collection => { :sold => :get } Rails 3 resources :products do member do get :short post :toggle end get :sold, :on => :collection end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Router e Rack FTW! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Router e Rack FTW! match "posts/:echo", :to => "posts#show" Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Router e Rack FTW! match "posts/:echo", :to => "posts#show" Rack App! match "posts/:echo", :to => PostsController.action(:show) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Router e Rack FTW! match "posts/:echo", :to => "posts#show" match "posts/:echo", :to => PostsController.action(:show) Rack App! match "/posts/:echo" => redirect("/foo/%{echo}") Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Router e Rack FTW! match "posts/:echo", :to => "posts#show" match "posts/:echo", :to => PostsController.action(:show) match "/posts/:echo" => redirect("/foo/%{echo}") Rack App! match "posts/:echo" => lambda { |env| [ 200, {“Content-Type” => “plain/text”}, ["Echo!"] ] } Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Router e Rack FTW! match "posts/:echo", :to => "posts#show" match "posts/:echo", :to => PostsController.action(:show) match "/posts/:echo" => redirect("/foo/%{echo}") match "posts/:echo" => lambda { |env| [ 200, {“Content-Type” => “plain/text”}, ["Echo!"] ] } Rack App! match "posts/:echo" => MySinatraBlog Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

100% compatível com Rack OMG! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer rsrails$ ls -lp app/ controllers/ helpers/ mailers/ models/ views/ rsrails$ rails g mailer Notifier signup_notification create app/mailers/notifier.rb invoke erb create app/views/notifier create app/views/notifier/signup_notification.text.erb invoke test_unit create test/functional/notifier_test.rb Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer rsrails$ ls -lp app/ controllers/ helpers/ mailers com diretório próprio mailers/ models/ views/ rsrails$ rails g mailer Notifier signup_notification create app/mailers/notifier.rb invoke erb create app/views/notifier create app/views/notifier/signup_notification.text.erb invoke test_unit create test/functional/notifier_test.rb Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer Nova API Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

TMail Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

TMail Mail Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer nova API class Notifier < ActionMailer::Base default :from => "system@example.com" def signup_notification(recipient) @account = recipient attachments[image.jpg] = File.read("image.jpg") mail(:to => recipient.email) do |format| format.html format.text end end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer nova API class Notifier < ActionMailer::Base Defaults default :from => "system@example.com" def signup_notification(recipient) @account = recipient attachments[image.jpg] = File.read("image.jpg") mail(:to => recipient.email) do |format| format.html format.text end end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer nova API class Notifier < ActionMailer::Base Defaults Variáveis default :from => "system@example.com" de instância def signup_notification(recipient) @account = recipient attachments[image.jpg] = File.read("image.jpg") mail(:to => recipient.email) do |format| format.html format.text end end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer nova API class Notifier < ActionMailer::Base Defaults Variáveis default :from => "system@example.com" de instância def signup_notification(recipient) Attachments tipo @account = recipient cookies attachments[image.jpg] = File.read("image.jpg") mail(:to => recipient.email) do |format| format.html format.text end end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActionMailer nova API class Notifier < ActionMailer::Base Defaults Variáveis default :from => "system@example.com" de instância def signup_notification(recipient) Attachments tipo @account = recipient cookies attachments[image.jpg] = File.read("image.jpg") mail(:to => recipient.email) do |format| format.html format.text end end mail tipo respond_to do |format| end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

AbstractController::Base ActionController::Metal ActionMailer::Base ActionController::Base Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Menos coisas para lembrar OMG! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel • Google Summer of Code 2009: Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel • Google Summer of Code 2009: • Extrair a lógica comum entre ActiveRecord e ActiveResource Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel • Google Summer of Code 2009: • Extrair a lógica comum entre ActiveRecord e ActiveResource • Hoje Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel • Google Summer of Code 2009: • Extrair a lógica comum entre ActiveRecord e ActiveResource • Hoje • Desempenha papel no agnosticismo de ORM Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel • Google Summer of Code 2009: • Extrair a lógica comum entre ActiveRecord e ActiveResource • Hoje • Desempenha papel no agnosticismo de ORM • Permite a criação de models à la ActiveRecord Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveResource::Base + ActiveModel module ActiveResource ... class Base extend ActiveModel::Naming include CustomMethods, Observing, Validations include ActiveModel::Conversion include ActiveModel::Serializers::JSON include ActiveModel::Serializers::Xml end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveRecord::Base + ActiveModel Base.class_eval do ... extend ActiveModel::Naming ... include ActiveModel::Conversion include Validations ... include ActiveModel::MassAssignmentSecurity include Callbacks, ActiveModel::Observing, Timestamp end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

MyApp + ActiveModel class Person include ActiveModel::Validations attr_accessor :name, :age validates_presence_of :name, :age end >> p = Person.new => #<Person:0x102623588> >> p.valid? => false >> p.errors.full_messages => ["Name cant be blank", "Age cant be blank"] Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Agnosticismo de ORM Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Agnosticismo de ORM Agnosticismo de ORM ActiveModel Rails::Railtie Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Agnosticismo de ORM Agnosticismo de ORM ActiveModel Rails::Railtie Provê uma API para que o ActionPack possa conversar com o ORM Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Agnosticismo de ORM Agnosticismo de ORM ActiveModel Rails::Railtie Provê uma API para que o Integração do ORM com o Rails ActionPack possa conversar com o ORM Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel Validations Callbacks Serialization ActiveRecord Data Mapper MongoDB MeuModel Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveModel::Lint::Tests Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

module ActiveModel module Lint module Tests def test_to_key; end def test_to_param; end def test_valid?; end def test_persisted?; end def test_model_naming; end def test_errors_aref; end def test_errors_full_messages; end end end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ActiveRecord-like Ótimo exemplo de uso do ActiveModel http://github.com/plataformatec/mail_form Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Menos hacks! Reusabilidade OMG! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Nova API select joins where includes order group limit having offset lock from readonly Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Nova API Rails 2.3 Post.find(:all, :order => "published_at desc", :limit => 10) Rails 3 Post.order("published_at desc").limit(10) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Nova API Rails 2.3 Post.all(:conditions => ["published_at <= ?", Time.now], :include => :comments) Rails 3 Post.where("published_at <= ?", Time.now).includes(:comments) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Lazy loading Rails 2.3 Job.find(:all, :conditions => {:published => true}) Faz um query no DB imediatamente e retorna um array de Jobs Rails 3 Job.where(:published => true) Não faz query no DB, retorna um ActiveRecord::Relation Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Lazy loading # app/controllers/jobs_controller.rb class JobsController < ApplicationController def index @jobs = Jobs.where(:published => true).order("created_at DESC") end end # app/views/jobs/index.html.erb <% cache do %> <% @jobs.each do |job| %> ... <% end %> <% end %> Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Lazy loading # app/controllers/jobs_controller.rb class JobsController < ApplicationController def index @jobs = Jobs.where(:published => true).order("created_at DESC") end end Não realiza query no DB # app/views/jobs/index.html.erb <% cache do %> <% @jobs.each do |job| %> ... <% end %> <% end %> Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Lazy loading # app/controllers/jobs_controller.rb class JobsController < ApplicationController def index @jobs = Jobs.where(:published => true).order("created_at DESC") end end Não realiza query no DB # app/views/jobs/index.html.erb <% cache do %> <% @jobs.each do |job| %> ... <% end %> <% end %> Só aqui que será feito a query no DB Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Lazy loading # app/controllers/jobs_controller.rb class JobsController < ApplicationController def index @jobs = Jobs.where(:published => true).order("created_at DESC") end end Não realiza query no DB # app/views/jobs/index.html.erb <% cache do %> Se estiver cacheado, a query <% @jobs.each do |job| %> não é disparada! ... <% end %> <% end %> Só aqui que será feito a query no DB Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Chainability: it “quacks” like named_scope cars = Car.where(:colour => black) black_fancy_cars = cars.order(cars.price DESC).limit(10) black_cheap_cart = cars.order(cars.price ASC).limit(10) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Chainability: it “quacks” like named_scope ActiveRecord::Relation cars = Car.where(:colour => black) black_fancy_cars = cars.order(cars.price DESC).limit(10) black_cheap_cart = cars.order(cars.price ASC).limit(10) Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Chainability: it “quacks” like named_scope ActiveRecord::Relation cars = Car.where(:colour => black) black_fancy_cars = cars.order(cars.price DESC).limit(10) black_cheap_cart = cars.order(cars.price ASC).limit(10) Reaproveitar uma Relation e encadear mais ﬁnders Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Falando em named_scope... class Post < ActiveRecord::Base has_many :comments scope :published, where(posts.published_at is not null) scope :recent, published.order("posts.published_at desc").limit(10) end class Comment < ActiveRecord::Base belongs_to :post scope :from_published_posts, joins(:post) & Post.published end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Falando em named_scope... class Post < ActiveRecord::Base has_many :comments scope :published, where(posts.published_at is not null) scope :recent, published.order("posts.published_at desc").limit(10) end class Comment < ActiveRecord::Base DRY belongs_to :post scope :from_published_posts, joins(:post) & Post.published end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Mas e sobre o ARel que tanto se fala? Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

ARel == Relational Algebra ARel != ActiveRecord::Relation Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Código mais limpo OMG! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rails 2.3 def index @users = User.all respond_to do |format| format.html # index.html.erb format.xml { render :xml => @users } end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rails 3.0 respond_to :html, :xml def index @users = User.all respond_with(@users) end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

3 variáveis Formato do request Verbo HTTP Status do recurso Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rails 2.3 def create @user = User.new(params[:user]) respond_to do |format| if @user.save format.html { redirect_to @user, :notice => User was successfully created } format.xml { render :xml => @user, :status => :created, :location => @user } else format.html { render :action => "new" } format.xml { render :xml => @user.errors, :status => :unprocessable_entity } end end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Rails 3.0 def create @user = User.new(params[:user]) flash[:notice] = User was successfully created if @user.save respond_with(@user) end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

respond_with(@users) ActionController::Responder Formato do request Verbo HTTP Status do recurso Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

respond_with(@users) ActionController::Responder to_code Formato do request Verbo HTTP Status do recurso Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Responders Customizados Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

github.com/plataformatec/responders Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

github.com/plataformatec/responders FlashResponder: seta o ﬂash baseado no controller, na action e no status do recurso Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

github.com/plataformatec/responders FlashResponder: seta o ﬂash baseado no controller, na action e no status do recurso HttpCacheResponder: adiciona o cabeçalho HTTP Last-Modiﬁed para requests de API Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

github.com/plataformatec/responders FlashResponder: seta o ﬂash baseado no controller, na action e no status do recurso HttpCacheResponder: adiciona o cabeçalho HTTP Last-Modiﬁed para requests de API CollectionResponder: altera o redirecionamento para a action :index ao criar/atualizar um recurso Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

DRY OMG! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Unobtrusive Javascript: Rails 2.3 remote_form_for(@post) link_to Destroy, post, :confirm => Are you sure?,:method => :delete Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Unobtrusive Javascript: Rails 2.3 remote_form_for(@post) <form action="/posts" class="new_post" id="new_post" method="post" onsubmit="new Ajax.Request(/posts, {asynchronous:true, evalScripts:true, parameters:Form.serialize(this)}); return false;"> link_to Destroy, post, :confirm => Are you sure?,:method => :delete Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Unobtrusive Javascript: Rails 2.3 remote_form_for(@post) <form action="/posts" class="new_post" id="new_post" method="post" onsubmit="new Ajax.Request(/posts, {asynchronous:true, evalScripts:true, parameters:Form.serialize(this)}); return false;"> link_to Destroy, post, :confirm => Are you sure?,:method => :delete <a href="/posts/1" onclick="if (confirm(Are you sure?)) { var f = document.createElement(form); f.style.display = none; this.parentNode.appendChild(f); f.method = POST; f.action = this.href;var m = document.createElement(input); m.setAttribute(type, hidden); m.setAttribute(name, _method); m.setAttribute(value, delete); f.appendChild(m);var s = document.createElement(input); s.setAttribute(type, hidden); s.setAttribute(name, authenticity_token); s.setAttribute(value, LM2fEF6HuRWdYUZdEumWlemhI6iDPH97pqWhO4jEpiU=); f.appendChild(s);f.submit(); };return false;">Destroy</a> Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Unobtrusive Javascript: Rails 3 form_for(@posts, :remote => true) <form action="/posts" class="new_post" data-remote="true" id="new_post" method="post"> Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Unobtrusive Javascript: Rails 3 link_to Destroy, post, :confirm => Are you sure?, :method => :delete <a href="/posts/1" data-confirm="Are you sure?" data-method="delete" rel="nofollow">Destroy</a> Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

JS para todos os gostos • Prototype: default • jQuery: http://github.com/rails/jquery-ujs • MooTools: http://mootools.net/forge/p/rails_3_driver • Você pode fazer o seu! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Javascript no Rails 3 Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Javascript no Rails 3 Agnosticismo de Javascript HTML 5 custom data attributes JS driver para cada framework Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Helpers Deprecados no Rails 3 • link_to_remote • observe_ﬁeld • form_remote_tag • submit_to_remote • periodically_call_remote • remote_form_for • observe_form • button_to_remote http://github.com/rails/prototype_legacy_helper Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Agnosticismo + HTML 5 OMG! JQUERY! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

XSS protection Rails 2.3: unsafe por default <%= @job.title %> <%= h @job.title %> unsafe safe Rails 3: safe por default <%= @job.title %> <%= raw @job.title %> safe unsafe Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Helpers que retornam HTML module ApplicationHelper def strong(content) "<strong>#{h content}</strong>".html_safe end end Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Helpers que retornam HTML module ApplicationHelper def strong(content) "<strong>#{h content}</strong>".html_safe end end Dicas: 1. Certiﬁcar-se de que todo input está sendo escapado Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Helpers que retornam HTML module ApplicationHelper def strong(content) "<strong>#{h content}</strong>".html_safe end end Dicas: 1. Certiﬁcar-se de que todo input está sendo escapado 2. Chamar html_safe no output Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Segurança OMG! Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Agora... como eu começo a usar tudo isso que está disponível no Rails 3? Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Para começar rsrails$ gem install rails --pre ... Successfully installed rails-3.0.0.rc 23 gems installed rsrails$ rails -v Rails 3.0.0.rc Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Para atualizar Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Para atualizar • rails upgrade plugin: • http://github.com/rails/rails_upgrade Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Para atualizar • rails upgrade plugin: • http://github.com/rails/rails_upgrade • rails upgrade handbook: • http://www.railsupgradehandbook.com/ Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

Para atualizar • rails upgrade plugin: • http://github.com/rails/rails_upgrade • rails upgrade handbook: • http://www.railsupgradehandbook.com/ • screencasts “Upgrading to Rails 3”: • http://railscasts.com/, Episódios #225, #226 e #227 Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

?! Tem muito mais aqui! http://github.com/plataformatec Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

?! Tem muito mais aqui! http://github.com/plataformatec ID blog twitter Carlos Antonio blog.plataformatec.com.br @cantoniodasilvaSunday, November 6, 11

rails3 @ rsonrails - 2010.08.21

by Carlos Antonio da Silva on Nov 05, 2011

Accessibility

Categories

Tags

Upload Details

Usage Rights

1 Embed 2

Statistics

rails3 @ rsonrails - 2010.08.21 — Presentation Transcript