Pourquoi Ruby on Rails ça déchire ?
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Présentation accompagnant mon talk du Meetup Paris.rb du 10 janvier 2012.
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Pourquoi Ruby on Rails ça déchire ?
- 1. Simon Courtois - @happynoff www.tinci.fr Ruby on Rails Why does it rock?
- 7. www.tinci.fr Active Record articles id title body 1 hello world This is a body # app/models/article.rb class Article < ActiveRecord::Base end ! article = Article.first ! article.title #=> "hello world"
- 8. www.tinci.fr Active Record articles id title body published 1 hello world This is a body 1 2 other art. Not published 0 articles = Article.where(published: 1) ! articles.count #=> 1
- 10. www.tinci.fr Active Record articles id title body author_id 1 ... ... 1 authors id name 1 John Doe # app/models/article.rb class Article < ActiveRec... belongs_to :author end ! # app/models/author.rb class Author < ActiveRec... has_many :articles end ! article = Article.first ! article.author.name #=> “John Doe”
- 12. www.tinci.fr Routing # app/controller/hello_controller.rb class HelloController < ApplicationController def index @name = params[:name] end end http://example.com/hello/John # config/routes.rb get "hello/:name" => "hello#index" URL HTTP verb controller controller’s action parameter
- 13. www.tinci.fr Views # app/controller/hello_controller.rb class HelloController < ApplicationController def index @name = params[:name] end end # app/views/hello/index.html.erb Hello <%= @name %> Conventions !
- 14. www.tinci.fr Helpers # app/views/articles/index.html.erb <%= @articles.each do |article| %> <p><%= link_to article.title, article %></p> <% end %> # app/controller/articles_controller.rb class ArticlesController < ApplicationController def index @articles = Article.all end end <p><a href="/articles/1">hello world</a></p>
- 15. www.tinci.fr Helpers # app/controller/articles_controller.rb class ArticlesController < ApplicationController def new @article = Article.new end end <%= form_for @article do |f| %> <p><%= f.label :title, "Title" %><br /> <%= f.text_field :title %></p> ! <p><%= f.label :body, "Body" %><br /> <%= f.text_area :body %></p> ! <p><%= f.submit %></p> <% end %> Title Body Create Article
- 16. www.tinci.fr Railties $ rake routes GET /hello/:name { :controller => "hello", :action => "index" } $ rails server Starts a web server listening on http://localhost:3000/ $ rails console Starts an interactive console in the application context >> Article.first.title! #=> "hello world"
- 17. www.tinci.fr Generators $ rails generate model author name:string invoke active_record create db/migrate/20120108151543_create_authors.rb create app/models/author.rb instructions to create the authors table the Author model
- 18. www.tinci.fr Generators $ rails g scaffold author name:string create db/migrate/20120108152723_create_authors.rb create app/models/author.rb ! route resources :authors ! create app/controllers/authors_controller.rb ! create app/views/authors/index.html.erb create app/views/authors/edit.html.erb create app/views/authors/show.html.erb create app/views/authors/new.html.erb create app/views/authors/_form.html.erb ! create public/stylesheets/scaffold.css model routes controller views default CSS
- 19. www.tinci.fr Generators # config/routes.rb resources :authors authors GET /authors { action: index controller: authors } author GET /authors/:id { action: show controller: authors } new_author GET /authors/new { action: new controller: authors } POST /authors { action: create controller: authors } edit_author GET /authors/:id/edit { action: edit controller: authors } PATCH /authors/:id { action: update controller: authors } PUT /authors/:id { action: update controller: authors } DELETE /authors/:id { action: destroy controller: authors } <%= link_to "All authors", authors_path %> <%= link_to "Edit", edit_author_path(@author) %>
- 28. www.tinci.fr ActiveSupport little additions 1.kilobytes! #=> 1024! ! ! 3.days.ago!! #=> Tue, 24 Jun 2014 09:44:47 UTC +00:00! ! ! "héhé test".parameterize! #=> "hehe-test"! ! ! “article”.pluralize!! ! ! #=> "articles"
- 30. www.tinci.fr Views and forms <%= form_for @article do |f| %> <p><%= f.label :title, "Title" %><br /> <%= f.text_field :title %></p> ! <p><%= f.label :body, "Body" %><br /> <%= f.text_area :body %></p> ! <p><%= f.submit %></p> <% end %> = simple_form_for @article do |f| = f.input :title = f.input :body = f.submit slim + simple_form
- 31. www.tinci.fr And many more Mongoid Kaminari Carrierwave Active Admin MongoDB Pagination File upload Administration interface
- 32. www.tinci.fr Who is using Rails? Twitter Basecamp Github Groupon US Yellow Pages Shopify http://rubyonrails.org/applications
- 33. www.tinci.fr Resources rubyonrails.org Official website tutorials.jumpstartlab.com/topics Very complete tutorial railsforzombies.org Interactive tutorial railstutorial.org/book Free online book #rubyonrails.fr French IRC channel