Presentation technique et commerciale de Ruby on Rails
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This document provides an overview of Ruby on Rails in French. It discusses key aspects of Rails like MVC architecture, conventions over configuration, ActiveRecord, routing, asset pipeline, testing, generators, deployment with Capistrano, and popular gems. Popular Rails resources like guides and tutorials are also mentioned.
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Presentation technique et commerciale de Ruby on Rails
- 5. interprété > 1 + 1 => 2
- 7. orientéobjetpur > 1 + 1 => 2 > 1.send(:+, 1) => 2
- 10. dynamique > ary = [] => [] > ary.class.class_eval { attr_accessor :total_entries } => nil > ary.total_entries = 42 => 42 > ary.total_entries => 42
- 11. class Printing def method_missing(m, *args) if (name = /^test_(.+)$/.match(m.id2name)) print name[1] end end End > printing = Printing.new > printing.test_hello => "hello" > printing.test_pipo => "pipo" dynamique
- 12. blocklambda, fonction anonyme, etc. > ["a","b","c"].each_with_index{|element,i| puts i } 0 1 2
- 13. blocklambda, fonction anonyme, etc. > ["a", "b", "c"].map{|element| element.upcase } => ["A", "B", "C"]
- 14. lisibilité > 5.times { print "Odelay!" } > Exit unless "restaurant".include?("aura") > ['toast', 'cheese', 'wine'].each{|food| print food.capitalize }
- 16. Ruby ?QuelRuby ? 1.8.7 MRI 1.9.3 MRI 2.0.0 MRI rbx 2.0.0 JRuby 1.7.4
- 17. rbenvrvm # rbenv list 1.8.7-p358 1.9.3-p392 2.0.0-p0 * 2.0.0-p195 (set by /home/yannski/.rbenv/version)
- 18. rbenv # rbenv install jruby-1.7.4 # rbenv local jruby-1.7.4
- 19. bundler&Gemfile source 'https://rubygems.org' gem 'rails', '4.0.0' gem 'rails-i18n' gem 'sass-rails', '~> 4.0.0' gem 'haml-rails', '>= 4.0.0' gem 'mongoid', github: 'mongoid/mongoid'
- 20. Ruby on Rails
- 26. environments # ls -l config/environments/ development.rb production.rb test.rb
- 27. DRY
- 30. class Product < ActiveRecord::Base end ActiveRecord / migrations class CreateProducts < ActiveRecord::Migration def change create_table :products do |t| t.string :name t.text :description t.timestamps end end end db/migrate/20130626120509_create_products.rb app/models/product.rb
- 31. ActiveRecord / migrations mysql> show tables; +---------------------------------+ | Tables_in_monapppli_development | +---------------------------------+ | products | | schema_migrations | +---------------------------------+ 2 rows in set (0.00 sec) mysql> describe schema_migrations; +---------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+--------------+------+-----+---------+-------+ | version | varchar(255) | NO | PRI | NULL | | +---------+--------------+------+-----+---------+-------+ 1 row in set (0.00 sec) mysql> select * from schema_migrations; +----------------+ | version | +----------------+ | 20130626120509 | +----------------+ 1 row in set (0.00 sec)
- 32. irb(main):001:0> product = Product.new => #<Product id: nil, name: nil, description: nil, created_at: nil, updated_at: nil> irb(main):002:0> product.name = "Macbook" => "Macbook" irb(main):003:0> product.save (0.4ms) BEGIN SQL (0.3ms) INSERT INTO `products` (`created_at`, `name`, `updated_at`) VALUES ('2013-06-26 12:08:17', 'Macbook', '2013-06-26 12:08:17') (4.7ms) COMMIT => true ActiveRecord / migrations
- 33. irb(main):004:0> Product.count (0.5ms) SELECT COUNT(*) FROM `products` => 1 irb(main):005:0> Product.first Product Load (0.5ms) SELECT `products`.* FROM `products` ORDER BY `products`.`id` ASC LIMIT 1 => #<Product id: 1, name: "Macbook", description: nil, created_at: "2013-06-26 12:08:17", updated_at: "2013-06-26 12:08:17"> irb(main):006:0> Product.where(name: "Macbook") Product Load (0.8ms) SELECT `products`.* FROM `products` WHERE `products`.`name` = 'Macbook' => #<ActiveRecord::Relation [#<Product id: 1, name: "Macbook", description: nil, created_at: "2013-06-26 12:08:17", updated_at: "2013-06-26 12:08:17">]> irb(main):008:0> Product.where(name: "Macbook").first Product Load (0.7ms) SELECT `products`.* FROM `products` WHERE `products`.`name` = 'Macbook' ORDER BY `products`.`id` ASC LIMIT 1 => #<Product id: 1, name: "Macbook", description: nil, created_at: "2013-06-26 12:08:17", updated_at: "2013-06-26 12:08:17"> ActiveRecord / query
- 34. > Product.where(name: "Macbook") Product Load (0.8ms) SELECT `products`.* FROM `products` WHERE `products`.`name` = 'Macbook' => #<ActiveRecord::Relation [#<Product id: 1, name: "Macbook", description: nil, created_at: "2013-06-26 12:08:17", updated_at: "2013-06-26 12:08:17">]> > Product.where(name: "Macbook").to_a Product Load (0.4ms) SELECT `products`.* FROM `products` WHERE `products`.`name` = 'Macbook' => [#<Product id: 1, name: "Macbook", description: nil, created_at: "2013-06-26 12:08:17", updated_at: "2013-06-26 12:08:17">] ActiveRecord / query
- 35. class Product validates_presence_of :name end ActiveRecord / validations class CreateProducts < ActiveRecord::Migration def change create_table :products do |t| t.string :name t.text :description t.timestamps end end end db/migrate/20130626120509_create_products.rb app/models/product.rb
- 36. > product = Product.new => #<Product id: nil, name: nil, description: nil, created_at: nil, updated_at: nil> > product.save (0.3ms) BEGIN (0.2ms) ROLLBACK => false > product.errors => #<ActiveModel::Errors:0x007f2f9fb1bec8 @base=#<Product id: nil, name: nil, description: nil, created_at: nil, updated_at: nil>, @messages={:name=>["can't be blank"]}> ActiveRecord / validations
- 37. class Product validates_presence_of :name belongs_to :category end ActiveRecord / associations app/models/product.rb class Category has_many :products end app/models/category.rb
- 38. class Product before_validate :reformat before_save :check_name after_save :rebuild_category after_destroy :destroy_category_if_empty end ActiveRecord / life cycle app/models/product.rb
- 40. Routing
- 41. Restful
- 42. asset pipeline
- 43. //= require jquery //= require jquery_ujs //= require jquery-ui //= require bootstrap //= require bootstrap-datepicker //= require jquery_nested_form //= require ckeditor/init //= require_tree . app/assets/javascripts/application.js asset pipeline
- 44. *= require "custombootstrap" *= require "fontawesome" *= require "datepicker" *= require_self app/assets/stylesheets/application.css.scss asset pipeline
- 45. ActiveSupport
- 46. > "Je suis à la gare".blank ? => false ActiveSupport
- 48. > "Je suis à la gare".parameterize => "je-suis-a-la-gare" ActiveSupport
- 49. > "John était allongé à la table d'un café quand soudain le loup apparu.".truncate(22) => "John était allongé …" ActiveSupport
- 50. ActionView
- 52. Test Tests unitaires des models, des controllers, des helpers Tests fonctionnels (rspec, capybara, etc.)
- 53. railsconsole
- 54. > Product.where(name: "Macbook") Product Load (0.8ms) SELECT `products`.* FROM `products` WHERE `products`.`name` = 'Macbook' => #<ActiveRecord::Relation [#<Product id: 1, name: "Macbook", description: nil, created_at: "2013-06-26 12:08:17", updated_at: "2013-06-26 12:08:17">]> > Product.where(name: "Macbook").to_a Product Load (0.4ms) SELECT `products`.* FROM `products` WHERE `products`.`name` = 'Macbook' => [#<Product id: 1, name: "Macbook", description: nil, created_at: "2013-06-26 12:08:17", updated_at: "2013-06-26 12:08:17">] ActiveRecord / query
- 55. railsserver
- 56. railsgenerate
- 57. debugger
- 58. i18n
- 66. paperclip upload de fichiers, stockage, thumbnails, etc.
- 70. resque gestion des jobs asynchrones (backend Redis)