Rails 3 Internals

Rails 3 Internals Conhecendo detalhes do framework que fazem a diferença. Anderson Leite @anderson_leite www.andersonleite.com.br Tuesday, September 14, 2010

Rails 3 Internals Rails 3 Architectural changes Rails + Merb Tuesday, September 14, 2010

Rails 3 Internals Rails 3 Modularidade Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation ActiveModel Railtie Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation Tuesday, September 14, 2010

Rails 3 Internals Tuesday, September 14, 2010

Rails 3 Internals Diego Carrion ?? Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 2 @models = Model.find(:all, :conditions => {:value => true} ) Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 2 @models = Model.find(:all, :conditions => {:value => true} ) # Rails 3 @models = Model.where(:value => true) Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 2 @models = Model.find(:all, :conditions => {:value => true} ) # Rails 3 @models = Model.where(:value => true) @models = @models.order(params[:order]) Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 2 @models = Model.find(:all, :conditions => {:value => true} ) # Rails 3 @models = Model.where(:value => true) @models = @models.order(params[:order]) @models = Model.where(:value => true).order(params[:order]) Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 2 @models = Model.find(:all, :conditions => {:value => true} ) Array # Rails 3 @models = Model.where(:value => true) @models = @models.order(params[:order]) @models = Model.where(:value => true).order(params[:order]) Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 2 @models = Model.find(:all, :conditions => {:value => true} ) Array # Rails 3 @models = Model.where(:value => true) @models = @models.order(params[:order]) @models = Model.where(:value => true).order(params[:order]) Relation Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 3 @models = Model.where(:value => true) @models = @models.order(params[:order]) @models = Model.where(:value => true).order(params[:order]) Relation Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 3 @models = Model.where(:value => true) @models = @models.order(params[:order]) @models = Model.where(:value => true).order(params[:order]) Relation @models.each do |m| #... end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 3 @models = Model.where(:value => true) @models = @models.order(params[:order]) @models = Model.where(:value => true).order(params[:order]) Relation @models.each do |m| #... end Lazy Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 3 @models = Model.where(:value => true).order(params[:order]).all Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 3 @models = Model.where(:value => true).order(params[:order]).all Nova API (where, limit, having) Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 3 @models = Model.where(:value => true).order(params[:order]).all where having select group Nova API (where, limit, having) order limit offset joins includes lock readonly from Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation # Rails 3 @models = Model.where(:value => true).order(params[:order]).all where having select group Nova API (where, limit, having) order limit Relation offset joins Encadeamento includes lock readonly from Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation 1) internamente 2) minha app? Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation Nova API (where, limit, having) Relation Encadeamento Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation querys dinâmicas class Post < ActiveRecord::Base belongs_to :usuario end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation querys dinâmicas class Post < ActiveRecord::Base belongs_to :usuario texto end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation querys dinâmicas class Post < ActiveRecord::Base belongs_to :usuario texto end > 1 ano Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation querys dinâmicas class Post < ActiveRecord::Base belongs_to :usuario texto end > 1 ano true Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation { :filter => { > rails 2 :conteudo => "texto", :comentarios => true, conditions :usuario_id => "1" } named scopes } Tuesday, September 14, 2010

Rails 3 Internals class PostTest < ActiveSupport::TestCase setup do create_posts end test "filtro em branco devolve todos os posts" do assert_equal Post.all, Post.filtered_relation({}).all end def create_posts valid_attributes = { :body => "Hello.", :title => "Hi!", :content => "text", :user_id => 1, :published_at => Time.now } @base = Post.create(valid_attributes) @quote = Post.create(valid_attributes.merge(:content => "quote")) @number2 = Post.create(valid_attributes.merge(:user_id => 2)) @old = Post.create(valid_attribtues.merge(:published_at => 1.year.ago)) end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation class Post < ActiveRecord::Base belongs_to :user end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation class Post < ActiveRecord::Base belongs_to :user def self.filtered_relation(params) relation = scoped end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation class Post < ActiveRecord::Base belongs_to :user def self.filtered_relation(params) relation = scoped params.each do |facet, value| relation = send("filter_by_#{facet}", value, relation) end relation end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation class Post < ActiveRecord::Base def self.filter_by_content(value, relation) belongs_to :user relation.where(:content => value) end def self.filtered_relation(params) relation = scoped params.each do |facet, value| relation = send("filter_by_#{facet}", value, relation) end relation end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation test "apenas posts com conteudo especifico" do assert_equal @quote, Post.filtered_relation(:content => "quote").first end class Post < ActiveRecord::Base def self.filter_by_content(value, relation) belongs_to :user relation.where(:content => value) end def self.filtered_relation(params) relation = scoped params.each do |facet, value| relation = send("filter_by_#{facet}", value, relation) end relation end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation class Post < ActiveRecord::Base belongs_to :user def self.filtered_relation(params) relation = scoped params.each do |facet, value| relation = send("filter_by_#{facet}", value, relation) end relation end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation def self.filter_by_published_at(value, relation) value ? relation.where("published_at < ?", 1.month.ago) : relation end class Post < ActiveRecord::Base belongs_to :user def self.filtered_relation(params) relation = scoped params.each do |facet, value| relation = send("filter_by_#{facet}", value, relation) end relation end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation test "given a date filter, only gives us the filtered records" do assert_equal @old, Post.filtered_relation(:published_at => true).first end def self.filter_by_published_at(value, relation) value ? relation.where("published_at < ?", 1.month.ago) : relation end class Post < ActiveRecord::Base belongs_to :user def self.filtered_relation(params) relation = scoped params.each do |facet, value| relation = send("filter_by_#{facet}", value, relation) end relation end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation test "given a comments count filter, only gives us the filtered records" do assert_equal @base, Post.filtered_relation(:comments => true).first end def self.filter_by_comments(value, relation) if value relation.preload(:comments). select("posts.*, COUNT(comments.id) AS comment_count"). class Post < ActiveRecord::Base from("posts, comments").having("comment_count > 0") belongs_to :user else relation def self.filtered_relation(params) end end relation = scoped params.each do |facet, value| relation = send("filter_by_#{facet}", value, relation) end relation end end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation test "given a content and comment filter, gives us filtered records" do @base.update_attribute(:content, "picture") assert_equal @base, Post.filtered_relation(:content => "picture", :comments => true).first end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation test "given a content and comment filter, gives us filtered records" do @base.update_attribute(:content, "picture") assert_equal @base, Post.filtered_relation(:content => "picture", :comments => true).first end test "given a date and comment filter, gives us filtered records" do @base.update_attribute(:published_at, 2.years.ago) assert_equal @base, Post.filtered_relation(:published_at => true, :comments => true).first end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation test "given a content and comment filter, gives us filtered records" do @base.update_attribute(:content, "picture") assert_equal @base, Post.filtered_relation(:content => "picture", :comments => true).first end test "given a date and comment filter, gives us filtered records" do @base.update_attribute(:published_at, 2.years.ago) assert_equal @base, Post.filtered_relation(:published_at => true, :comments => true).first end test "given a date and content filter, gives us filtered records" do @base.update_attribute(:published_at, 2.years.ago) @base.update_attribute(:content, "picture") record = Post.filtered_relation(:published_at => true, :content => "picture").first assert_equal @base, record end Tuesday, September 14, 2010

Rails 3 Internals ActiveRelation posts = Post.filtered_relation(:comments => true) .where(:user_id => 4).limit(3).order("id ASC") posts.each do |post| # Do something here... end Tuesday, September 14, 2010

Rails 3 Internals Reflexão Tuesday, September 14, 2010

Rails 3 Internals ActiveModel class Message extend ActiveModel::Callbacks define_model_callbacks :deliver def deliver _run_deliver_callbacks do puts "DELIVER!" end end end Tuesday, September 14, 2010

Rails 3 Internals ActiveModel class Message include ActiveModel::Validations validates_presence_of :body, :user_id attr_accessor :body, :user_id, :posted_at end m = Message.new(nil, 13) m.valid? # => false m.body = "Hello there!" m.valid? # => true Tuesday, September 14, 2010

Rails 3 Internals ActiveModel class Message include ActiveModel::Validations Attributes validates_presence_of :body, :user_id attr_accessor :body, :user_id, :posted_at Callbacks Errors end Observing m = Message.new(nil, 13) Serialization m.valid? # => false Translation m.body = "Hello there!" m.valid? # => true Validations Tuesday, September 14, 2010

Rails 3 Internals ActiveModel class ProperCategoryValidator < ActiveModel::EachValidator def validate_each(record, attribute, value) unless record.user.category_ids.include?(value) record.errors.add attribute, 'has bad category.' end end end Tuesday, September 14, 2010

Rails 3 Internals ActiveModel class ProperCategoryValidator < ActiveModel::EachValidator def validate_each(record, attribute, value) unless record.user.category_ids.include?(value) record.errors.add attribute, 'has bad category.' end end end validate :category_id, :proper_category => true Tuesday, September 14, 2010

Rails 3 Internals ActiveModel class ReallyComplexValidator < ActiveModel::Validator def validate(record) record.errors[:base] << "Validacao A" unless valid_a (record) record.errors[:base] << "Validacao B" unless valid_b (record) record.errors[:base] << "Validacao C" unless valid_c (record) end private def valid_a (record) # ... end def valid_b (record) # ... end def valid_c (record) # ... end end Tuesday, September 14, 2010

Rails 3 Internals ActiveModel class ReallyComplexValidator < ActiveModel::Validator def validate(record) record.errors[:base] << "Validacao A" unless valid_a (record) record.errors[:base] << "Validacao B" unless valid_b (record) record.errors[:base] << "Validacao C" unless valid_c (record) end private def valid_a (record) class NewsPost < ActiveRecord::Base # ... end validates_with ReallyComplexValidator end def valid_b (record) # ... end def valid_c (record) # ... end end Tuesday, September 14, 2010

Rails 3 Internals ActiveModel template rendering, controller logic, e database query results <% cache do %> <% @posts.each do |post| %> <%= render :partial => 'post', :object => post %> <% end %> <% end %> Tuesday, September 14, 2010

Rails 3 Internals ActiveRecord::Relation vs ARel Tuesday, September 14, 2010

Rails 3 Internals Rails 3 > Modularidade Desacoplamento Tuesday, September 14, 2010

Rails 3 Internals Rails 3 > Modularidade Opnionated ? Meta-framework ? Tuesday, September 14, 2010

Rails 3 Internals Rails 3 config.ru # This file is used by Rack-based servers to start the application. require ::File.expand_path('../config/environment', __FILE__) run MinhaApp::Application Tuesday, September 14, 2010

Rails 3 Internals Railtie > Engine > Application Inicializar Rails App Coordenar processos de boot Carregar plugins Carregar ActiveSupport Outros: database, logging, sessions Tuesday, September 14, 2010

Rails 3 Internals Tuesday, September 14, 2010

Rails 3 Internals Railtie - autoload Tuesday, September 14, 2010

Rails 3 Internals Railtie Tuesday, September 14, 2010

Rails 3 Internals Railtie Frameworks Rails > Rails Plugins Tuesday, September 14, 2010

Rails 3 Internals Railtie ... Plugins....ARel.... Tuesday, September 14, 2010

Rails 3 Internals Railtie ... Plugins....ARel.... require 'filtered_relation' require 'rails' module FilteredRelation class Railtie < Rails::Railtie railtie_name :filtered_relation end end Tuesday, September 14, 2010

Rails 3 Internals Railtie ... Plugins....ARel.... require 'filtered_relation' require 'rails' module FilteredRelation class Railtie < Rails::Railtie railtie_name :filtered_relation código end end Tuesday, September 14, 2010

Rails 3 Internals Links http://www.engineyard.com/blog/2010/rails-and-merb-merge-orm-agnosticism-part-5-of-6/ http://vimeo.com/14550567 http://github.com/rails/rails/blob/master/activerecord/lib/active_record/relation.rb http://piotrsarnacki.com/2010/06/18/rails-internals-railties/ http://rubyonrails.org/screencasts/rails3/action-controller http://www.igvita.com/2010/08/04/rails-3-internals-railtie-creating-plugins/ http://piotrsarnacki.com/2010/06/18/rails-internals-railties/ http://metautonomo.us/2010/05/11/activerecord-relation-vs-arel/ Tuesday, September 14, 2010

Obrigado! Rails 3 Internals Conhecendo detalhes do framework que fazem a diferença. Anderson Leite @anderson_leite www.andersonleite.com.br Tuesday, September 14, 2010

Rails 3 Internals

by andersonleite on Sep 14, 2010

Accessibility

Categories

Tags

Upload Details

Usage Rights

Statistics

Rails 3 Internals — Presentation Transcript