Rails 4 in 30'

Transcript

1. WHAT’S NEW
   RAILS 4 IN 30’
   Monday, October 29, 12
   

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2. Monday, October 29, 12
   

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3. Monday, October 29, 12
   

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4. ■ Migration
   ■ Ruby 1.9.3
   ■ Strong Parameters
   ■ Declarative ETags
   ■ Cache Digests
   ■ Turbolinks
   ■ ActiveSupport::Queue
   ■ Async Mailers
   ■ Routing Concerns
   ■ ActionController::Live
   ■ Security
   ■ Other features
   AGENDA
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5. MIGRATION
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6. 3.0.X ➡ 3.1.X ➡ 3.2.X
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7. IN EACH STEP ...
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8. TESTS
   COVERAGE
   QA
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9. DEPRECATIONS
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10. ■ Active Resource
    ■ AR Observers
    ■ AR Session Store
    ■ AMo Mass Assignment Sanitizer
    ■ Hash Based Finders
    ■ find_all_* / find_last_*
    ■ Action Caching
    ■ Page Caching
    AVAILABLE AS GEMS
    Monday, October 29, 12
    

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11. VENDOR/PLUGINS
    WAS REMOVED
    Monday, October 29, 12
    

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12. USE RAILS GUIDES
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13. Monday, October 29, 12
    

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14. Monday, October 29, 12
    

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15. ■ YARV
    ■ Fastest VM
    ■ Bytecode interpreter
    ■ Lazy Sweep GC (tuneable)
    ■ Native Threads
    ■ Better strategy for GIL / GVL
    ■ Encodings
    RUBY 1.9.3
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16. FEATURES
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17. STRONG
    PARAMETERS
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18. ActiveRecord::Schema.define(version:  20121010233758)  do
       create_table  "users",  force:  true  do  |t|
           t.string      "username"
           t.string      "password"
           t.boolean    "admin"
           t.datetime  "created_at"
           t.datetime  "updated_at"
       end
    end
    #  ...
    user  =  User.new  params[:user]
    MASS ASSIGNMENT
    Monday, October 29, 12
    

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19. ActiveRecord::Schema.define(version:  20121010233758)  do
       create_table  "users",  force:  true  do  |t|
           t.string      "username"
           t.string      "password"
           t.boolean    "admin"
           t.datetime  "created_at"
           t.datetime  "updated_at"
       end
    end
    #  ...
    user  =  User.new  params[:user]
    MASS ASSIGNMENT
    Monday, October 29, 12
    

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20. RA
    ILS
    3.2
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base;  end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  params[:user]
           redirect_to  @user
       end
    end
    #  raises  ActiveModel::MassAssignmentSecurity::Error
    MASS ASSIGNMENT
    Monday, October 29, 12
    

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21. RA
    ILS
    4.0
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base;  end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  params[:user]
           redirect_to  @user
       end
    end
    #  raises  ActiveModel::ForbiddenAttributesError
    MASS ASSIGNMENT
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22. RA
    ILS
    3.2
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base
       attr_accessible  :username,
                                       :password
    end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  params[:user]
           redirect_to  @user
       end
    end
    MASS ASSIGNMENT
    Monday, October 29, 12
    

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23. RA
    ILS
    3.2
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base
       attr_accessible  :username,
                                       :password
    end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  params[:user]
           redirect_to  @user
       end
    end
    MASS ASSIGNMENT
    Monday, October 29, 12
    

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24. RA
    ILS
    4.0
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base;  end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  params.require(:user).
                                                                   permit(:username,  :password)
           redirect_to  @user
       end
    end
    STRONG PARAMETERS
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25. RA
    ILS
    4.0
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base;  end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  params.require(:user).
                                                                   permit(:username,  :password)
           redirect_to  @user
       end
    end
    STRONG PARAMETERS
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26. RA
    ILS
    4.0
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base;  end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  user_params
           redirect_to  @user
       end
       private
       def  user_params
           params.require(:user).permit(:username,  :password)
       end
    end
    STRONG PARAMETERS
    Monday, October 29, 12
    

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27. RA
    ILS
    4.0
    #  app/models/user.rb
    class  User  <  ActiveRecord::Base;  end
    #  app/controllers/users_controller.rb
    class  UsersController  <  ApplicationController
       def  create
           @user  =  User.create!  user_params
           redirect_to  @user
       end
       private
       def  user_params
           params.require(:user).permit(:username,  :password)
       end
    end
    STRONG PARAMETERS
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28. RA
    ILS
    4.0
    curl  http://localhost:3000/users  -­‐d  
    "user[username]=spastorino&user[admin]=true&
    authenticity_token=mm89V7LxLMRJoMJcnP6SIxnxg19RzcO56hdqbDZNmVo
    ="  -­‐-­‐cookie  cookie
    STRONG PARAMETERS
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29. RA
    ILS
    4.0
    curl  http://localhost:3000/users  -­‐d  
    "user[username]=spastorino&user[admin]=true&
    authenticity_token=mm89V7LxLMRJoMJcnP6SIxnxg19RzcO56hdqbDZNmVo
    ="  -­‐-­‐cookie  cookie
    STRONG PARAMETERS
    Monday, October 29, 12
    

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30. RA
    ILS
    4.0
    user  =  User.find_by_username('spastorino')
    user.admin?
    =>  false
    STRONG PARAMETERS
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31. RA
    ILS
    4.0
    user  =  User.find_by_username('spastorino')
    user.admin?
    =>  false
    user.update_attributes(username:  'santiago',  admin:  true)
    =>  true
    STRONG PARAMETERS
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32. RA
    ILS
    4.0
    user  =  User.find_by_username('spastorino')
    user.admin?
    =>  false
    user.update_attributes(username:  'santiago',  admin:  true)
    =>  true
    user.admin?
    =>  true
    STRONG PARAMETERS
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33. HTTPS://GITHUB.COM/RAILS/STRONG_PARAMETERS
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34. DECLARATIVE
    ETAGS
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35. RA
    ILS
    3.2
    class  TodolistsController  <  ApplicationController
       def  show
           @todolist  =  Todolist.find(params[:id])
           fresh_when  etag:  @todolist
       end
    end
    DECLARATIVE ETAGS
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36. RA
    ILS
    4.0
    class  TodolistsController  <  ApplicationController
       etag  {  current_user.try  :admin  }
       def  show
           @todolist  =  Todolist.find(params[:id])
           fresh_when  etag:  @todolist
       end
    end
    DECLARATIVE ETAGS
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37. RA
    ILS
    4.0
    class  TodolistsController  <  ApplicationController
       etag  {  current_user.try  :admin  }
       etag  {  @project.try  :cache_key  }
       def  show
           @todolist  =  Todolist.find(params[:id])
           fresh_when  etag:  @todolist
       end
    end
    DECLARATIVE ETAGS
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38. HTTPS://GITHUB.COM/RAILS/ETAGGER
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39. CACHE
    DIGESTS
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40. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
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41. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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42. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
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43. Monday, October 29, 12
    

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44. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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45. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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46. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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47. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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48. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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49. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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50. RA
    ILS
    3.2
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHING VIEWS
    Monday, October 29, 12
    

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51. RA
    ILS
    4.0
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
     
    
    CACHE DIGESTS
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52. RA
    ILS
    4.0
    #  projects/show.html.erb
    
       All  my  todo  lists:
       
    
    #  todolists/_todolist.html.erb
    
       :
       
    
    #  todos/_todo.html.erb
    
       
    
    CACHE DIGESTS
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53. CRITICISMS
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54. HTTPS://GITHUB.COM/RAILS/CACHE_DIGESTS
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55. TURBOLINKS
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56. FOLLOW LINKS
    WITHOUT
    RELOADING THE
    WHOLE PAGE
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57. DOESN’T
    DOWNLOAD JS &
    CSS
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58. DOESN’T
    DOWNLOAD JS &
    CSS
    NOT A REAL GAIN IF YOU USE CACHING
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59. DOESN’T RE-COMPILE
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60. DOESN’T RE-COMPILE
    ONLY V8
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61. Monday, October 29, 12
    

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62. DOESN’T RE-
    EVALUATE
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63. CONSIDERATIONS
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64. HTTPS://GITHUB.COM/RAILS/TURBOLINKS
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65. ACTIVESUPPORT::QUEUE
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66. RA
    ILS
    4.0
    Rails.queue.push  Job.new
    job  =  Rails.queue.pop
    job.run
    AS::QUEUE
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67. RA
    ILS
    4.0
    #  config/application.rb
    #  Default  Synchronous
    config.queue  =  ActiveSupport::SynchronousQueue.new
    #  Default  Threaded
    config.queue  =  ActiveSupport::Queue.new
    #  Resque  Queue
    config.queue  =  Resque::Rails::Queue.new
    #  Sidekiq  Queue
    config.queue  =  Sidekiq::Client::Queue.new
    AS::QUEUE
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68. ASYNC
    MAILERS
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69. RA
    ILS
    3.2
    class  UsersController  <  ActionController::Base
       def  create
           @user  =  User.new  params[:user]
           if  @user.save
               UserMailer.welcome_email(@user).deliver
           end
           respond_with  @user
       end
    end
    MAILERS
    Monday, October 29, 12
    

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70. RA
    ILS
    4.0
    class  UsersController  <  ActionController::Base
       def  create
           @user  =  User.new  params[:user]
           if  @user.save
               UserMailer.welcome_email(@user).deliver
           end
           respond_with  @user
       end
    end
    ASYNC MAILERS
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71. ROUTING
    CONCERNS
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72. RA
    ILS
    3.2
    #  config/routes.rb
    Myapp::Application.routes.draw  do
       resources  :messages  do
           resources  :comments
       end
       resources  :forwards  do
           resources  :comments
       end
       resources  :uploads  do
           resources  :comments
       end
       resources  :documents  do
           resources  :comments
       end
       resources  :todos  do
           resources  :comments
       end
    ROUTING CONCERNS
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73. RA
    ILS
    4.0
    #  config/routes.rb
    Myapp::Application.routes.draw  do
       concern  :commentable  do
           resources  :comments
       end
       resources  :messages,    concerns:  :commentable
       resources  :forwards,    concerns:  :commentable
       resources  :uploads,      concerns:  :commentable
       resources  :documents,  concerns:  :commentable
       resources  :todos,          concerns:  :commentable
    end
    ROUTING CONCERNS
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74. ACTIONCONTROLLER::LIVE
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75. RA
    ILS
    4.0
    class  MyController  <  ActionController::Base
    end
    AC::LIVE
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76. RA
    ILS
    4.0
    class  MyController  <  ActionController::Base
       include  ActionController::Live
    end
    AC::LIVE
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77. RA
    ILS
    4.0
    class  MyController  <  ActionController::Base
       include  ActionController::Live
       def  index
           100.times  {
               response.stream.write  "hi\n"
           }
           response.stream.close
       end
    end
    AC::LIVE
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78. HTTP://TENDERLOVEMAKING.COM/2012/07/30/
    IS-IT-LIVE.HTML
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79. SECURITY
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80. ■ match doesn’t catch all
    SECURITY
    Monday, October 29, 12
    

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81. ■ match doesn’t catch all
    ■ ej. match ‘/follow’
    SECURITY
    Monday, October 29, 12
    

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82. ■ match doesn’t catch all
    ■ ej. match ‘/follow’
    ■ escape_html_entities_in_json = true
    SECURITY
    Monday, October 29, 12
    

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83. ■ match doesn’t catch all
    ■ ej. match ‘/follow’
    ■ escape_html_entities_in_json = true
    ■ var posts = #{ @posts.to_json }
    SECURITY
    Monday, October 29, 12
    

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84. ■ match doesn’t catch all
    ■ ej. match ‘/follow’
    ■ escape_html_entities_in_json = true
    ■ var posts = #{ @posts.to_json }
    ■ X-Frame-Options: SAMEORIGIN
    SECURITY
    Monday, October 29, 12
    

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85. ■ match doesn’t catch all
    ■ ej. match ‘/follow’
    ■ escape_html_entities_in_json = true
    ■ var posts = #{ @posts.to_json }
    ■ X-Frame-Options: SAMEORIGIN
    ■ X-Xss-Protection: 1; mode=block
    SECURITY
    Monday, October 29, 12
    

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86. ■ match doesn’t catch all
    ■ ej. match ‘/follow’
    ■ escape_html_entities_in_json = true
    ■ var posts = #{ @posts.to_json }
    ■ X-Frame-Options: SAMEORIGIN
    ■ X-Xss-Protection: 1; mode=block
    ■ X-Content-Type-Options: nosniff
    SECURITY
    Monday, October 29, 12
    

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87. ■ threadsafe! by default
    ■ ActiveRecord::Model
    ■ ActiveModel::Model
    ■ ActiveRecord::Relation
    ■ Schema cache dump
    ■ Dalli
    ■ PATCH verb
    ■ Friendly errors
    ■ Default test directories have changed
    OTHER FEATURES
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88. WE ❤ OSS
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89. WHEN IS
    RAILS 4
    GOING TO BE
    RELEASED?
    Monday, October 29, 12
    

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90. @SPASTORINO
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91. THANK YOU!
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92. QUESTIONS?
    Monday, October 29, 12
    

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