Pourquoi Ruby on Rails ça déchire ?
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This document provides an overview of Ruby on Rails, including its core components like MVC, Active Record, routing, views, helpers, and generators. It explains how Rails uses conventions to simplify development tasks. It also discusses how Rails is extensible through gems and lists some well-known companies that use Rails in production, like Twitter, GitHub, and Shopify. Additional resources for learning Rails are provided at the end.
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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