Rails: da manutenção ao deploy

Escrevi minha aplicação Rails. E agora?

- Que ferramentas podem ajudar a encontrar problemas de performance?
- Conheça melhor aquela rake task que você nem lembrava que existia.
- Como reaproveitar lógica entre diversas aplicações Rails?
- Quero testar meus scripts de deploy em minha máquina, o que fazer?
- Unicorn ou Thin? Nginx ou Apache? O que usar?

Nesse talk vou mostrar algumas ferramentas que podem ajudar o seu dia a dia como usuário do framework Rails. São dicas que podem acelerar a produtividade e responder aquelas perguntas que acabam aparecendo quando suas primeira aplicações Rails entram em produção

Transcript

1. Da manutenção ao Deploy Ou: eu escrevi uma aplicação Rails, e coloquei em produção. E agora?
2. Everyday Rails
3. Ricardo Valeriano @sr_valeriano github.com/ricardovaleriano ruby (rails), java, javascript, ios
4. Rails is AWESOME Thanks for the hard work, Rails Core guys. You ROCK!
5. Objetivo: conhecer melhor as partes que surgem lá no `rails new` e são massageadas até o `cap deploy`
7. $ rails new photoniac
8. $ rails new photoniac
9. $ rails new photoniac
10. $ rails new photoniac --skip-bundle \
11. $ rails new photoniac --skip-bundle --skip-test-unit \
12. $ rails new photoniac --skip-bundle --skip-test-unit -d mysql \
14. $ cd photoniac
15. $ cd photoniac $ rm public/index.html
16. $ cd photoniac $ rm public/index.html ...
17. NÃO pode mais usar Rails (> =3.1.x) sem Coffee-Script NÃO pode mais usar Rails (> =3.1.x) sem Coffee-Script
18. NÃO pode mais usar Rails (> =3.1.x) sem Coffee-Script NÃO pode mais usar Rails (> =3.1.x) sem Coffee-Script @dhh approves
20. é só comentar no Gemfile
21. Gemfile # Gems used only for assets and not required # in production environments by default. group :assets do # gem 'sass-rails', '~> 3.2.3' # gem 'coffee-rails', '~> 3.2.1' # gem 'therubyracer', :platforms => :ruby gem 'uglifier', '>= 1.0.3' end
22. Gemfile # Gems used only for assets and not required # in production environments by default. group :assets do # gem 'sass-rails', '~> 3.2.3' # gem 'coffee-rails', '~> 3.2.1' # gem 'therubyracer', :platforms => :ruby gem 'uglifier', '>= 1.0.3' end
23. Gemfile # Gems used only for assets and not required # in production environments by default. group :assets do # gem 'sass-rails', '~> 3.2.3' # gem 'coffee-rails', '~> 3.2.1' # gem 'therubyracer', :platforms => :ruby gem 'uglifier', '>= 1.0.3' end
24. Gemfile # Gems used only for assets and not required # in production environments by default. group :assets do # gem 'sass-rails', '~> 3.2.3' # gem 'coffee-rails', '~> 3.2.1' gem 'therubyracer', :platforms => :ruby gem 'uglifier', '>= 1.0.3' end
25. Gemfile # Gems used only for assets and not required # in production environments by default. group :assets do # gem 'sass-rails', '~> 3.2.3' # gem 'coffee-rails', '~> 3.2.1' gem 'therubyracer', :platforms => :ruby gem 'uglifier', '>= 1.0.3' end
26. preguiça:
27. preguiça: a virtude do programador maroto
28. ~/.railsrc ($ rails new)
29. ~/.railsrc ($ rails new) --skip-bundle
30. ~/.railsrc ($ rails new) --skip-bundle --skip-test-unit
31. ~/.railsrc ($ rails new) --skip-bundle --skip-test-unit -d mysql
32. ~/.railsrc ($ rails new) --skip-bundle --skip-test-unit -d mysql -m ~/.rails/rails_rspec.rb
33. template
34. template # remove o index e o rails.png remove_file 'public/index.html' remove_file 'public/images/rails.png'
35. template # remove o index e o rails.png remove_file 'public/index.html' remove_file 'public/images/rails.png' # comenta sass e conffee no Gemfile # e adiciona rspec gsub_file "Gemfile", /(gem 'sass-rails',.*)/, '# \1' gsub_file "Gemfile", /(gem 'coffee-rails',.*)/, '# \1' gem "rspec-rails", :group => [:development, :test]
36. template # remove o index e o rails.png remove_file 'public/index.html' remove_file 'public/images/rails.png' # comenta sass e conffee no Gemfile # e adiciona rspec gsub_file "Gemfile", /(gem 'sass-rails',.*)/, '# \1' gsub_file "Gemfile", /(gem 'coffee-rails',.*)/, '# \1' gem "rspec-rails", :group => [:development, :test] # resolve dependências usando bundler run "bundle install"
37. template # remove o index e o rails.png remove_file 'public/index.html' remove_file 'public/images/rails.png' # comenta sass e conffee no Gemfile # e adiciona rspec gsub_file "Gemfile", /(gem 'sass-rails',.*)/, '# \1' gsub_file "Gemfile", /(gem 'coffee-rails',.*)/, '# \1' gem "rspec-rails", :group => [:development, :test] # resolve dependências usando bundler run "bundle install" # gera o básico necessário para o rspec generate "rspec:install" append_file ".rspec", "--require spec_helper"
39. $ rails g model --help Usage: rails generate model NAME [field[:type][:index] field[:type][:index]]
43. E #comofas? com as configurações, chaves e segredos de api?
45. Aplicação integrada com a awesome xoxial media.
47. Podemos usar um yml config/awesome_xoxial_media.yml
48. config/awesome_xoxial_media.yml development: key: omgLOLdevKEY secret: OMGLsecretDEVwinyNILLY production: key: opaLELEproductionKEY secret: OHfrackTHEproductionSECRET
49. config/awesome_xoxial_media.yml development: key: omgLOLdevKEY secret: OMGLsecretDEVwinyNILLY production: key: opaLELEproductionKEY secret: OHfrackTHEproductionSECRET &defaults
50. config/awesome_xoxial_media.yml development: key: omgLOLdevKEY secret: OMGLsecretDEVwinyNILLY production: key: opaLELEproductionKEY secret: OHfrackTHEproductionSECRET &defaults test: <<: *defaults
51. config/initializers/ awesome_xoxial_media.rb
52. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end
53. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end
54. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end
55. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end development: key: omgLOLdevKEY production: key: opaLELEproductionKEY
56. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end development: key: omgLOLdevKEY production: key: opaLELEproductionKEY
57. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end config.axm_key = options["key"] config.axm_secret = options["secret"]
58. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end config.axm_key = options["key"] config.axm_secret = options["secret"]
59. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end config.axm_key = options["key"] config.axm_secret = options["secret"] options = options.with_indifferent_access
60. config/initializers/ awesome_xoxial_media.rb Photomatic::Application.configure do path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] end config.axm_key = options[:key] config.axm_secret = options[:secret] options = options.with_indifferent_access
61. app/models/post.rb class Post < ActiveRecord::Base attr_accessible :body, :title def notify_xoxial(user) xoxial_options = { key: Rails.application.config.axm_key, secret: Rails.application.config.axm_secret } XoxialMedia.publish title, user.xoxial_id, xoxial_options end end
62. app/models/post.rb class Post < ActiveRecord::Base attr_accessible :body, :title def notify_xoxial(user) xoxial_options = { key: Rails.application.config.axm_key, secret: Rails.application.config.axm_secret } XoxialMedia.publish title, user.xoxial_id, xoxial_options end end
63. app/models/post.rb class Post < ActiveRecord::Base attr_accessible :body, :title def notify_xoxial(user) xoxial_options = { key: Rails.application.config.axm_key, secret: Rails.application.config.axm_secret } XoxialMedia.publish title, user.xoxial_id, xoxial_options end end
64. app/models/post.rb class Post < ActiveRecord::Base attr_accessible :body, :title def notify_xoxial(user) xoxial_options = { key: Rails.application.config.axm_key, secret: Rails.application.config.axm_secret } XoxialMedia.publish title, user.xoxial_id, xoxial_options end end Rails.application.config.axm_key
66. config/initializers/ awesome_xoxial_media.rb
67. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end
68. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end
69. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end
70. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end
71. app/models/post.rb class Post < ActiveRecord::Base attr_accessible :body, :title def notify_xoxial(user) xoxial_options = { key: Rails.application.config.axm_key, secret: Rails.application.config.axm_secret } XoxialMedia.publish title, user.xoxial_id, xoxial_options end end
72. app/models/post.rb class Post < ActiveRecord::Base attr_accessible :body, :title def notify_xoxial(user) xoxial_options = { key: Photomatic.axm_key, secret: Photomatic.axm_secret } XoxialMedia.publish title, user.xoxial_id, xoxial_options end end
74. E #comofas? com as chaves e segredos de api?
75. E #comofas? com as chaves e segredos de api? ‘Commita’ no git sem dó?
76. Tem coisa que quanto menos pessoas souberem, melhor.
78. O Unix já resolveu essa bucha...
79. O Unix já resolveu essa bucha... ... as usual!
81. $ rails db:create \ RAILS_ENV=production
82. $ rails db:create \ RAILS_ENV=production ENVironment Variable
83. $ rails db:create \ RAILS_ENV=production associada com um processo
84. $ rails db:create \ RAILS_ENV=production
86. $ rails server -e production \ AXM_KEY=OMG \ AXM_SECRET=LOL
87. config/awesome_xoxial_media.yml development: key: omgLOLdevKEY secret: OMGLsecretDEVwinyNILLY production: key: <%= ENV[“AXM_KEY”] %> secret: <%= ENV[“AXM_SECRET”] %> &defaults test: <<: *defaults
88. config/awesome_xoxial_media.yml development: key: omgLOLdevKEY secret: OMGLsecretDEVwinyNILLY production: key: <%= ENV[“AXM_KEY”] %> secret: <%= ENV[“AXM_SECRET”] %> &defaults test: <<: *defaults
89. config/awesome_xoxial_media.yml development: key: omgLOLdevKEY secret: OMGLsecretDEVwinyNILLY production: key: <%= ENV[“AXM_KEY”] %> secret: <%= ENV[“AXM_SECRET”] %> &defaults test: <<: *defaults
90. config/awesome_xoxial_media.yml development:&defaults key: omgLOLdevKEY secret: OMGLsecretDEVwinyNILLY production: key: <%= ENV["AXM_KEY"] %> secret: <%= ENV["AXM_SECRET"] %> test: <<: *defaults
91. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = YAML.load(IO.read(path))[Rails.env] options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end
92. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end options = YAML.load(IO.read(path))[Rails.env]
93. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end template = ERB.new(IO.read(path)).result options = YAML.load(IO.read(path))[Rails.env]
94. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end template = ERB.new(IO.read(path)).result options = YAML.load(IO.read(path))[Rails.env]
95. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end template = ERB.new(IO.read(path)).result options = YAML.load(IO.read(path))[Rails.env]
96. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end template = ERB.new(IO.read(path)).result options = YAML.load(template)[Rails.env]
97. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end template = ERB.new(IO.read(path)).result options = YAML.load(template)[Rails.env]
98. config/initializers/ awesome_xoxial_media.rb module Photomatic mattr_accessor :axm_key, :axm_secret path = "config/awesome_xoxial_media.yml" options = options.with_indifferent_access self.axm_key = options[:key] self.axm_secret = options[:secret] end template = ERB.new(IO.read(path)).result options = YAML.load(template)[Rails.env] # FULEIRO: em prod usar vars AXM_KEY e AXM_SECRET
99. comentário para lembrar de algo...
100. comentário para lembrar de algo... não tem a menor chance de dar errado!
102. $ rake -T notes
103. $ rake -T notes
104. $ rake -T notes
105. $ rake -T notes
106. $ rake -T notes
108. $ rake notes:custom \ ANNOTATION=FULEIRO
109. $ ANNOTATION=FULEIRO \ rake notes:custom
112. Rails Doesn’t Scale Rails Doesn’t Scale
113. Rails Doesn’t Scale Rails Doesn’t Scale scumbag steve approves, yo!
114. O problema pode ser no banco O problema pode ser no banco
116. Otimizar consultas?
118. quais?
120. ActiveRecord::Relation #explain
121. app/controllers/post_controller.rb
122. app/controllers/post_controller.rb class PostsController < ApplicationController # GET /posts # GET /posts.json def index @posts = Post.order(:id) logger.info @posts.explain respond_to do |format| format.html # index.html.erb format.json { render json: @posts } end end # ...
123. app/controllers/post_controller.rb class PostsController < ApplicationController # GET /posts # GET /posts.json def index @posts = Post.order(:id) logger.info @posts.explain respond_to do |format| format.html # index.html.erb format.json { render json: @posts } end end # ...
124. app/controllers/post_controller.rb class PostsController < ApplicationController # GET /posts # GET /posts.json def index @posts = Post.order(:id) logger.info @posts.explain respond_to do |format| format.html # index.html.erb format.json { render json: @posts } end end # ...
125. app/controllers/post_controller.rb class PostsController < ApplicationController # GET /posts # GET /posts.json def index @posts = Post.order(:id) logger.info @posts.explain respond_to do |format| format.html # index.html.erb format.json { render json: @posts } end end # ...
127. (auto) explain “slow” queries
128. config/environments/development.rb # Log the query plan for queries taking # more than this (works # with SQLite, MySQL, and PostgreSQL) config.active_record. auto_explain_threshold_in_seconds = 0.5
130. app/models/ post.rb & author.rb
131. app/models/ post.rb & author.rb class Post < ActiveRecord::Base attr_accessible :body, :title belongs_to :author end
132. app/models/ post.rb & author.rb class Post < ActiveRecord::Base attr_accessible :body, :title belongs_to :author end
133. app/models/ post.rb & author.rb class Post < ActiveRecord::Base attr_accessible :body, :title belongs_to :author end class Author < ActiveRecord::Base attr_accessible :email, :name has_many :posts end
134. todos os (10) posts
135. todos os (10) posts @posts = Post.order("created_at")
136. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end
137. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end select * from posts
138. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end select * from posts 10 vezes
139. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end select * from posts 10 vezes
140. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end select * from posts
141. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end select * from posts puts post.author.name
142. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end select * from posts puts post.author.name select * from author where id = ?
143. todos os (10) posts @posts = Post.order("created_at") @posts.each do |post| puts post.title end select * from posts puts post.author.name select * from author where id = ? N (10) vezes
144. GET /posts >>> N + 1
145. GET /posts >>> N + 1 1 query
146. GET /posts >>> N + 1 1 query +N queries
148. Eager loading!
149. app/controllers/posts_controller.rb
150. app/controllers/posts_controller.rb @posts = Post.order(:id).includes(:author)
151. app/controllers/posts_controller.rb @posts = Post.order(:id).includes(:author)
152. GET /posts
153. GET /posts 1 query
154. GET /posts 1 query +1 query
155. Bullet github.com/flyerhzm/bullet
156. Gemfile gem 'bullet', group: :development
157. config/initializers/bullet.rb
158. config/initializers/bullet.rb if defined? Bullet Bullet.enable = true Bullet.alert = true end
161. E onde está o cadastro de imagens?
163. $ rails plugin \ new photoniac_engine \ --mountable $ cd photoniac_engine
164. pronto para testes
165. pronto para testes
166. rails generators disponíveis
167. rails generators disponíveis
168. namespaced models module PhotoniacEngine class Photo < ActiveRecord::Base end end
170. $ rake db:migrate
171. $ rake db:migrate ?
172. Gemfile gem 'photoniac_engine', path: 'vendor/engines/photoniac_engine'
173. Gemfile gem 'photoniac_engine', path: 'vendor/engines/photoniac_engine'
175. path
176. path ?
178. $ gem unpack oppa.gem \ --target vendor/engines
180. $ bundle ... Using photoniac_engine (0.0.1) from source at vendor/engines/photoniac_engine
182. $ rake -T photoniac_engine rake photoniac_engine:install:migrations
183. config/routes.rb Photomatic::Application.routes.draw do resources :posts mount PhotoniacEngine::Engine => "/media" end
184. config/routes.rb Photomatic::Application.routes.draw do resources :posts mount PhotoniacEngine::Engine => "/media" end
185. CarrierWave github.com/jnicklas/carrierwave
186. vendor/engines/photoniac_engine/ photoniac_engine.gemspec Gem::Specification.new do |s| #... s.name = "photoniac_engine" s.version = PhotoniacEngine::VERSION #... s.add_dependency "carrierwave" s.add_dependency "mini_magick" #... end
187. vendor/engines/photoniac_engine/ photoniac_engine.gemspec Gem::Specification.new do |s| #... s.name = "photoniac_engine" s.version = PhotoniacEngine::VERSION #... s.add_dependency "carrierwave" s.add_dependency "mini_magick" #... end
189. $ cd vendor/engines/...
190. $ cd vendor/engines/... $ rails g migration \ add_image_to_photos \ image:string
191. CarrierWave + ActiveRecord module PhotoniacEngine class Photo < ActiveRecord::Base end end
192. CarrierWave + ActiveRecord module PhotoniacEngine class Photo < ActiveRecord::Base end end mount_uploader :image, ImageUploader
193. vendor/engines/photoniac_engine/ config/initializers/carrierwave.rb require 'carrierwave' require 'carrierwave/orm/activerecord' CarrierWave.configure do |config| config.root = "#{Rails.application.root}/public" end
196. Chegou a hora de fazer um teste.
197. Chegou a hora de fazer um teste. Faremos na máquina de produção, né?
198. Não há qualquer chance de dar zica.
200. Vagrant
201. Vagrant $ vagrant box add base \ http://files.vagrantup.com/lucid64.box
202. Vagrant $ vagrant box add base \ http://files.vagrantup.com/lucid64.box $ vagrant init
203. Vagrant $ vagrant box add base \ http://files.vagrantup.com/lucid64.box $ vagrant init $ vagrant up
204. Vagrant $ vagrant box add base \ http://files.vagrantup.com/lucid64.box $ vagrant init $ vagrant up $ vagrant ssh
205. Vagrant $ vagrant box add base \ http://files.vagrantup.com/lucid64.box $ vagrant init $ vagrant up $ vagrant ssh $ vagrant package
206. Vagrant $ vagrant box add base \ http://files.vagrantup.com/lucid64.box $ vagrant init $ vagrant up $ vagrant ssh $ vagrant package $ vagrant box add railsbox \ package.box
207. Vagrant $ vagrant init railsbox
208. diretório /vagrant aponta dir “original”
209. diretório /vagrant aponta dir “original”
212. WEBrick em produção?
214. servir requests http é [MUITO] complicado ...
215. inexiste a change de dar errado!
216. ... mas muito bem resolvido
217. ... mas muito bem resolvido
231. ... muito bem resolvido mesmo
232. ... muito bem resolvido mesmo
235. SO
236. SO SO
237. SO SO
238. SO SO
239. quedê número?
240. quedê número?
241. quedê número?
242. quedê número?
243. quedê número?
244. quedê número?
245. quedê número?
246. Disclaimer: longe de mim encerrar qualquer discussão...
247. Tranquilidade para servir os pedidos http
249. mas e a aplicação?
250. enter Passenger (a.k.a. mod_rails, a.k.a. mod_rack)
251. enter Passenger (a.k.a. mod_rails, a.k.a. mod_rack) @dhh approves
260. https://github.com/blog/ 517-unicorn
262. Load Balancer
264. Balanceamento de carga entre processos?
265. Balanceamento de carga entre processos? resolvido no ínicio dos tempos bro.
267. Disclaimer: longe de mim encerrar qualquer discussão...
268. + (angry)
269. + (angry)
271. Capistrano
272. Gemfile gem 'capistrano'
273. [add] writing './Capfile' [add] writing './config/deploy.rb' [done] capified!
274. $ capify . [add] writing './Capfile' [add] writing './config/deploy.rb' [done] capified!
275. config/deploy.rb task :rock do puts "and rails" end
276. * executing `rock' and rails
277. $ cap rock * executing `rock' and rails
278. http://yehudakatz.com/2011/06/14/what-the-hell-is-happening-to-rails http://devcenter.heroku.com/articles/config-vars#example http://guides.rubyonrails.org/getting_started.html http://www.youtube.com/watch?v=GRfJ9lni4QA http://guides.rubyonrails.org/active_record_querying.html#running-explain https://github.com/rweng/pry-rails https://github.com/flyerhzm/bullet http://railscasts.com/episodes/372-bullet http://blog.plataformatec.com.br/2012/07/active-record-loves-blocks http://guides.rubyonrails.org/engines.html http://www.debian-administration.org/articles/530 http://www.wikivs.com/wiki/Apache_vs_nginx (importante pelos links citados) http://www.sonassi.com/knowledge-base/magento-kb/mythbusting/why-shouldnt-i-use-nginx-for- magento http://blog.laaz.org/tech/2011/08/25/ruby-rack-servers-benchmark ** http://railscasts.com ** referências