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2º encontro de Frevo on Rails
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RUBY ON RAILS 3O que vem de novo por aí...
FREVO ON RAILSGRUPO DE USUÁRIOS RUBY/RAILS DE PERNAMBUCO
GUILHERME CARVALHO E LAILSON BANDEIRA
FREVO ON RAILS
“No, no another Rails upgrade!”
FREVO ON RAILS
Rails 2 + MerbAnunciado em dezembro de 2008
FREVO ON RAILS
Versão 3.0.0.beta4Funciona em Ruby 1.8.7 e 1.9.2
Contain
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Versão 3.0.0.beta3
Versão 3.0.0.beta2
Versão 3.0.0.beta1
Versão 3.0.0.rc1
FREVO ON RAILS
MAJOR UPGRADE
FREVO ON RAILS
Mudanças arquiteturais importantes
FREVO ON RAILS
RAILS
FREVO ON RAILS
ACTIVERECORD
ACTIVESUPPORT
ACTIVEMODEL
ACTIONPACK
ACTIVERESOURCE
ACTIONMAILER
RAILTIES
FREVO ON RAILS
COMMAND INTERFACE
FREVO ON RAILS
rails nome_da_app
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rails new nome_da_app
FREVO ON RAILS
script/server
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rails server
FREVO ON RAILS
rails s
FREVO ON RAILS
script/generate controller nome_do_controlador
FREVO ON RAILS
rails generate controller nome_do_controlador
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rails g controller nome_do_controlador
FREVO ON RAILS
console
dbconsole
plugin
destroy
benchmarker
profiler
runner
FREVO ON RAILS
Gerenciamento de gems com o Bundler
FREVO ON RAILS
ROUTING
FREVO ON RAILS
Não se usa mais o map!
FREVO ON RAILS
ActionController::Routing::Routes.draw do |map| map.resources :postsend
FREVO ON RAILS
ActionController::Routing::Routes.draw do |map| resources :postsend
FREVO ON RAILS
Resources e singular resources não mudaram
FREVO ON RAILS
Namespaces e scopes
FREVO ON RAILS
map.with_options(:namespace => “admin”) do |a| a.resources :photosend
FREVO ON RAILS
namespace “admin” do resources :photosend
FREVO ON RAILS
Scopes foram criados para auxiliar na organização
FREVO ON RAILS
map.resources :photos, :member => {:preview => :get }
FREVO ON RAILS
resources :photos do get :preview, on: :memberend
FREVO ON RAILS
Sai o método connect, entra o match
FREVO ON RAILS
rake routes
FREVO ON RAILS
RESPONDERS
FREVO ON RAILS
class PostsController < ApplicationController def index @posts = Post.all
respond_to do |format| format.html # index.html.erb format.xml { render :xml => @posts } end end
def show @post = Post.find(params[:id])
respond_to do |format| format.html # show.html.erb format.xml { render :xml => @post } end end...end
FREVO ON RAILS
class PostsController < ApplicationController respond_to :html, :xml, :json def index @posts = Post.all
respond_with(@posts) end
def show @post = Post.find(params[:id])
respond_with(@post) end...end
FREVO ON RAILS
É possível também criar outros responders
FREVO ON RAILS
Three reasons to love Respondershttp://weblog.rubyonrails.org/2009/8/31/three-reasons-love-responder
FREVO ON RAILS
ACTION CONTROLLER
FREVO ON RAILS
Gargalo de performance:roteamento + renderização
FREVO ON RAILS
Separação de responsabilidades:Action Dispatch
FREVO ON RAILS
Hierarquia de controladores
FREVO ON RAILS
AbstractController::Base
ActionController::Metal
ActionController::Base
FREVO ON RAILS
ACTIVE RECORDQUERY API
FREVO ON RAILS
Nova API de consultaActive Relation
FREVO ON RAILS
@posts = Post.find(:all,! :conditions => ['created_at > ?', date])
FREVO ON RAILS
@posts = Post.where(['created_at > ?', date])
FREVO ON RAILS
Lazy loading
FREVO ON RAILS
@posts = Post.where(['created_at > ?', date])
if only_published?! @posts = @posts.where(:published => true)end
FREVO ON RAILS
# @posts.all@posts.each do |p|! ...end
FREVO ON RAILS
from
order
select
wherehaving
joins
group
includeslimit
offset
FREVO ON RAILS
minimum
firstall
sumcount
maximum
averagecalculate
last
FREVO ON RAILS
Active Record Query Interface 3http://m.onkey.org/2010/1/22/active-record-query-interface
FREVO ON RAILS
Escopos também foram simplificados
FREVO ON RAILS
class Post < ActiveRecord::Base named_scope :published, :conditions => {:published => true} named_scope :unpublished, :conditions => {:published => false}end
FREVO ON RAILS
class Post < ActiveRecord::Base scope :published, where(:published => true) scope :unpublished, where(:published => false)end
FREVO ON RAILS
VALIDAÇÕES SEMMODELOS
FREVO ON RAILS
Consequência da modularizaçãoActive Model
FREVO ON RAILS
class Person include ActiveModel::Validations validates_presence_of :first_name, :last_name attr_accessor :first_name, :last_nameend
FREVO ON RAILS
person = Person.newperson.valid? # falseperson.errors # {:first_name=>["can't be bl...p.first_name = 'John'p.last_name = 'Travolta'p.valid? # true
FREVO ON RAILS
Make Any Ruby Object Feel Like ARhttp://yehudakatz.com/2010/01/10/activemodel-make-any-
ruby-object-feel-like-activerecord/
FREVO ON RAILS
VALIDADORESCUSTOMIZADOS
FREVO ON RAILS
Agora é possível criar validadores que podem ser reusados
FREVO ON RAILS
Mais um resultado do desacoplamento
FREVO ON RAILS
module ActiveModel module Validations class CepValidator < EachValidator FORMATO_CEP = /\d{5}-\d{3}/
def initialize(options) super(options) end
def validate_each(record, attribute, value) unless valid?(value) record.errors[attribute] = 'não é válido' end end
def valid?(value) FORMATO_CEP =~ value end end endend
FREVO ON RAILS
require "#{Rails.root}/lib/validadores/cep_validator"
class Person < ActiveRecord::Base validates :cep, cep: trueend
FREVO ON RAILS
ACTION MAILER
FREVO ON RAILS
Sai TMail, entra Mail
FREVO ON RAILS
Uma nova casa para os mailers./app/mailers/nome_do_mailer
FREVO ON RAILS
Criação de defaults para diminuir duplicação de código
FREVO ON RAILS
class UserMailer < ActionMailer::Base! def welcome(user)! ! recipients user.email! ! from “email@example.com”! ! subject “Welcome to my site”! ! body { :user => user }! endend
FREVO ON RAILS
class UserMailer < ActionMailer::Base! default from: “email@example.com”
! def welcome(user)! ! @user = user
! ! mail(to: user.email, ! ! ! subject: “Welcome to my site”)! endend
FREVO ON RAILS
Anexos muito mais fáceis
FREVO ON RAILS
class UserMailer < ActionMailer::Base! default from: “email@example.com”
! def welcome(user)! ! @user = user! ! attachments[“hello.gif”] = File.read(‘...’)
! ! mail(to: user.email, ! ! ! subject: “Welcome to my site”)! endend
FREVO ON RAILS
class UserMailer < ActionMailer::Base! default from: “email@example.com”
! def welcome(user)! ! @user = user! ! attachments.inline[“logo.png”] = ! ! ! File.read(...)
! ! mail(to: user.email, ! ! ! subject: “Welcome to my site”)! endend
FREVO ON RAILS
FREVO ON RAILS
DEMO TIME
FREVO ON RAILS
RECURSOS
FREVO ON RAILS
Rails Dispatchhttp://railsdispatch.com/
FREVO ON RAILS
Rails Guides Edgehttp://guides.rails.info/
FREVO ON RAILS
Engine Yard Bloghttp://www.engineyard.com/blog
FREVO ON RAILS
Dive into Rails 3 Screencastshttp://rubyonrails.org/screencasts/rails3
FREVO ON RAILS
Railscastshttp://railscasts.com/
FREVO ON RAILS
Agile Web Development with Rails (4th ed.)http://pragprog.com/titles/rails4/agile-web-development-with-rails
FREVO ON RAILS
The Rails 3 Wayhttp://my.safaribooksonline.com/9780132480345
FREVO ON RAILS
FREVO ON RAILSGRUPO DE USUÁRIOS RUBY DE PERNAMBUCO
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