Features of Rails 5 you have not heard about

Talk given at Ruby Nation 2016

Transcript

1. Features of Rails 5 you haven’t heard about Features of Rails 5 you haven’t heard about
2. Features of Rails 5 you have not heard about
3. Prathamesh Sonpatki @_cha1tanya
5. Pune, India
6. Pune, India
8. Rails issues team
10. I don’t have Stickers
11. Stickers
12. T-Shirts are fine too
18. New welcome page
20. Rendering views outside of controller
21. Rendering views outside of controller
22. Rendering views outside of controller
23. OrdersController.render :show
24. OrdersController.render :show
25. OrdersController.render json: Order.all
26. OrdersController.render :show
27. OrdersController.render :show, assigns: { order: Order.last } # /app/views/orders/show.html.erb <%= @order.uid %>
28. OrdersController.render :show, assigns: { order: Order.last } # /app/views/orders/show.html.erb <%= @order.uid %>
29. Request environment
30. request.env
31. Request environment
32. Request environment
33. >> OrdersController.renderer.defaults => {:http_host=>"example.org", :https=>false, :method=>"get", :script_name=>"", :input=>""}
34. renderer = OrdersController.renderer.new(https: true) renderer.render template: ‘show'
35. renderer = OrdersController.renderer.new(https: true) renderer.render template: ‘show' # order_url => “https://example.org/orders/1”
36. https://github.com/brainopia/backport_new_renderer
37. No longer halts callback chain on false
38. class Order < ActiveRecord::Base before_save :set_eligibility_for_rebate before_save :ensure_credit_card_is_on_file def set_eligibility_for_rebate self.eligibility_for_rebate = decide_eligibility end def ensure_credit_card_is_on_file puts "check if credit card is on file" end end
39. class Order < ActiveRecord::Base before_save :set_eligibility_for_rebate before_save :ensure_credit_card_is_on_file def set_eligibility_for_rebate self.eligibility_for_rebate = decide_eligibility end def ensure_credit_card_is_on_file puts "check if credit card is on file" end end Order.create! => ActiveRecord::RecordNotSaved: ActiveRecord::RecordNotSaved
40. class Order < ActiveRecord::Base before_save :set_eligibility_for_rebate before_save :ensure_credit_card_is_on_file def set_eligibility_for_rebate self.eligibility_for_rebate = decide_eligibility end def ensure_credit_card_is_on_file puts "check if credit card is on file" end end Order.create! => check if credit card is on file => <Order id: 4, eligibility_for_rebate: false>
41. Explicit throw
42. class Order < ActiveRecord::Base before_save :set_eligibility_for_rebate before_save :ensure_credit_card_is_on_file def set_eligibility_for_rebate self.eligibility_for_rebate = decide_eligibility throw(:abort) end def ensure_credit_card_is_on_file puts "check if credit card is on file" end end Order.create! => ActiveRecord::RecordNotSaved: Failed to save the record
44. ActiveSupport.halt_callback_chains_on_return_false = false
45. Faster rendering of partials from cache
46. # index.html.erb <%= render partial: 'todo', collection: @todos %> # _todo.html.erb <% cache todo do %> <%= todo.name %> <% end %>
47. # index.html.erb <%= render partial: 'todo', collection: @todos %> # _todo.html.erb <% cache todo do %> <%= todo.name %> <% end %>
49. Folded into Rails 5
50. # index.html.erb <%= render partial: 'todo', collection: @todos, cached: true %> # _todo.html.erb <% cache todo do %> <%= todo.name %> <% end %>
52. Per job active job adapter
53. Per job active job adapter
54. config.active_job.queue_adapter = :sidekiq
55. config.active_job.queue_adapter = :sidekiq
56. config.active_job.queue_adapter = :sidekiq
57. class EmailJob < ActiveJob::Base self.queue_adapter = :sidekiq end class NewletterJob < ActiveJob::Base self.queue_adapter = :delayed_job end
58. class EmailJob < ActiveJob::Base self.queue_adapter = :sidekiq end class NewletterJob < ActiveJob::Base self.queue_adapter = :delayed_job end EmailJob.queue_adapter => #<ActiveJob::QueueAdapters::SidekiqAdapter: 0x007fb3d0b2e4a0> NewletterJob.queue_adapter => #<ActiveJob::QueueAdapters::DealyedJobAdapter: 0x007fb3d0c61b88>
59. Caching in development
60. Caching in development
61. # config/environments/development.rb config.action_controller.perform_caching = false
62. # config/environments/development.rb config.action_controller.perform_caching = true
63. $ rails dev:cache Development mode is now being cached.
64. config.action_controller.perform_caching = true config.static_cache_control = "public, max- age=172800" config.cache_store = :mem_cache_store
65. $ rails dev:cache Development mode is no longer being cached.
66. Puma as default web server
67. Puma as default web server
68. Controller actions default to 204 No Content
71. Browser request
72. def create @post = Post.new(post_params) if @post.save redirect_to @post, notice: 'Post was successfully created.’ else render ‘new’ end end
73. Started POST "/posts" for ::1 at 2016-06-02 09:24:53 -0400 Processing by PostsController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"FaRp8NUAZWIW0WnMzLpKKQht9WWeTxeSvOvO2GeFpkGbOXzYEnvxTKEZf7gwY 4oy6cW+GRQ3UE6Zu0iXGB4I5A==", "post"=>{"content"=>"hello"}, "commit"=>"Create Post"} (0.2ms) begin transaction SQL (0.3ms) INSERT INTO "posts" ("content", "created_at", "updated_at") VALUES (?, ?, ?) [["content", "hello"], ["created_at", 2016-06-02 13:24:53 UTC], ["updated_at", 2016-06-02 13:24:53 UTC]] (0.7ms) commit transaction Redirected to http://localhost:3000/posts/1 Completed 302 Found in 6ms (ActiveRecord: 1.3ms)
74. def create @post = Post.new(post_params) if @post.save else render ‘new’ end end
76. Started POST "/posts" for ::1 at 2016-06-02 09:25:11 -0400 Processing by PostsController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"RC46YER7l5yQz1J +DkZIWINBixkaMz9qWWlFzvZT8K3Ksy9IgwADsicHRAryn4hDYunAZZBLeLZ8OcOBicheCA==", "post"=>{"content"=>"hello 2"}, "commit"=>"Create Post"} (0.0ms) begin transaction SQL (0.2ms) INSERT INTO "posts" ("content", "created_at", "updated_at") VALUES (?, ?, ?) [["content", "hello 2"], ["created_at", 2016-06-02 13:25:11 UTC], ["updated_at", 2016-06-02 13:25:11 UTC]] (1.5ms) commit transaction No template found for PostsController#create, rendering head :no_content Completed 204 No Content in 64ms (ActiveRecord: 2.2ms)
77. Started POST "/posts" for ::1 at 2016-06-02 09:25:11 -0400 Processing by PostsController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"RC46YER7l5yQz1J +DkZIWINBixkaMz9qWWlFzvZT8K3Ksy9IgwADsicHRAryn4hDYunAZZBLeLZ8OcOBicheCA==", "post"=>{"content"=>"hello 2"}, "commit"=>"Create Post"} (0.0ms) begin transaction SQL (0.2ms) INSERT INTO "posts" ("content", "created_at", "updated_at") VALUES (?, ?, ?) [["content", "hello 2"], ["created_at", 2016-06-02 13:25:11 UTC], ["updated_at", 2016-06-02 13:25:11 UTC]] (1.5ms) commit transaction No template found for PostsController#create, rendering head :no_content Completed 204 No Content in 64ms (ActiveRecord: 2.2ms)
78. Don’t forget to respond
79. Don’t forget to me
80. Request encoding and response parsing
81. post articles_path(format: :json), params: { article: { title: 'Ahoy!' } }.to_json, headers: { 'Content-Type' => 'application/json' }
82. # test_helper.rb def parse_json JSON.parse(response.body) end
83. post articles_path, params: { article: { title: 'Ahoy!' } }, as: :json
84. post articles_path, { article: { title: 'Ahoy!' } }, as: :json assert_equal({ id: Article.last.id, title: 'Ahoy!' }, response.parsed_body)
85. Fragment Caching Action Mailer views
86. Fragment Caching Action Mailer views
87. config.action_mailer.perform_caching = true
88. <body> <% cache 'signup-text' do %> <h1>Welcome!</h1> <p>You have successfully signed up. Your username is: <br /> <% end %> <%= @user.login %>. <br /> </p> <%= render :partial => 'footer' %> </body>
89. <body> <% cache 'signup-text' do %> <h1>Welcome!</h1> <p>You have successfully signed up. Your username is: <br /> <% end %> <%= @user.login %>. <br /> </p> <%= render :partial => 'footer' %> </body>
90. Cache digest for app/views/user_mailer/_footer.erb: 7313427d26cc1f701b1e0212498cee38 Cache digest for app/views/user_mailer/welcome_email.html.erb: 30efff0173fd5f29a88ffe79a9eab617 Rendered user_mailer/_footer.erb (0.3ms) Rendered user_mailer/welcome_email.html.erb (26.1ms) Cache digest for app/views/user_mailer/welcome_email.text.erb: 77f41fe6159c5736ab2026a44bc8de55 Rendered user_mailer/welcome_email.text.erb (0.2ms) UserMailer#welcome_email: processed outbound mail in 190.3ms
91. No autoloading in production
92. No autoloading in production
93. No autoloading in production
94. Autoloading guide
95. edgeguides. rubyonrails.org/ autoloading_and_ reloading_constants. html
96. Want to know more about Rails 5?
97. Rails 5 Blog Series blog.bigbinary.com /categories/Rails-5
98. Rails 5 Blog Series blog.bigbinary.com /categories/Rails-5
99. This Week in Rails rails-weekly. ongoodbits.com
100. This Week in Rails rails-weekly. ongoodbits.com
101. New in Rails 5 track railsconf.com/ program
102. Thanks! @_cha1tanya @sonpatki
103. Credits https://www.flickr.com/photos/51274664@N06/6930338021/ https://www.flickr.com/photos/photographingtravis/16980613067/ https://www.flickr.com/photos/kailehmann/ https://www.flickr.com/photos/zak/4233363892/
104. Thanks! @_cha1tanya @_cha1tanya