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Hidden features of Rails 5

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Prathamesh Sonpatki @_cha1tanya [email protected]

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Pune, India

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Pune, India

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Pune, India

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Pune, India

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Pune, India

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I also got more professional skills

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PHP

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I don’t have Stickers

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Stickers

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T-Shirts are ﬁne too

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New welcome page

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Rendering views outside of controller

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Rendering views outside of controller

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Rendering views outside of controller

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OrdersController.render :show

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OrdersController.render :show

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OrdersController.render json: Order.all

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OrdersController.render :show

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OrdersController.render :show, assigns: { order: Order.last } # /app/views/orders/show.html.erb <%= @order.uid %>

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OrdersController.render :show, assigns: { order: Order.last } # /app/views/orders/show.html.erb <%= @order.uid %>

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Request environment

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request.env

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Request environment

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Request environment

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>> OrdersController.renderer.defaults => {:http_host=>"example.org", :https=>false, :method=>"get", :script_name=>"", :input=>""}

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renderer = OrdersController.renderer.new(https: true) renderer.render template: ‘show'

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renderer = OrdersController.renderer.new(https: true) renderer.render template: ‘show' # order_url => “https://example.org/orders/1”

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https://github.com/brainopia/backport_new_renderer

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Faster rendering of partials from cache

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# index.html.erb <%= render partial: 'todo', collection: @todos %> # _todo.html.erb <% cache todo do %> <%= todo.name %> <% end %>

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# index.html.erb <%= render partial: 'todo', collection: @todos %> # _todo.html.erb <% cache todo do %> <%= todo.name %> <% end %>

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Folded into Rails 5

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# index.html.erb <%= render partial: 'todo', collection: @todos, cached: true %> # _todo.html.erb <% cache todo do %> <%= todo.name %> <% end %>

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Per job active job adapter

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Per job active job adapter

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config.active_job.queue_adapter = :sidekiq

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config.active_job.queue_adapter = :sidekiq

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config.active_job.queue_adapter = :sidekiq

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class EmailJob < ActiveJob::Base self.queue_adapter = :sidekiq end class NewletterJob < ActiveJob::Base self.queue_adapter = :delayed_job end

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class EmailJob < ActiveJob::Base self.queue_adapter = :sidekiq end class NewletterJob < ActiveJob::Base self.queue_adapter = :delayed_job end EmailJob.queue_adapter => # NewletterJob.queue_adapter => #

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Caching in development

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Caching in development

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# config/environments/development.rb config.action_controller.perform_caching = false

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# config/environments/development.rb config.action_controller.perform_caching = true

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$ rails dev:cache Development mode is now being cached.

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config.action_controller.perform_caching = true config.static_cache_control = "public, max- age=172800" config.cache_store = :mem_cache_store

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$ rails dev:cache Development mode is no longer being cached.

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Puma as default web server

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Puma as default web server

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Silent asset logs in development

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Started GET "/assets/ application.self-4a04ce68c5ebf2d39fba46316802f17d0 a73fadc4d2da50a138d7a4bf2d26a84.css?body=1" for 127.0.0.1 at 2016-09-02 10:23:04 +0530 Started GET "/assets/bootstrap/ transition.self-6ad2488465135ab731a045a8ebbe3ea2fc 501aed286042496eda1664fdd07ba9.js?body=1" for 127.0.0.1 at 2016-09-02 10:23:04 +0530

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# config/environments/development.rb config.assets.quiet = true

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Finer control over SSL usage

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Redirect http to https

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Redirect http to https

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config.force_ssl = true config.ssl_options = { redirect: { status: 307, port: 81 } }

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HSTS headers

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config.ssl_options = { hsts: { preload: true } }

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config.ssl_options = { hsts: { expires: 10.days } }

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Controller actions default to 204 No Content

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Browser request

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def create @post = Post.new(post_params) if @post.save redirect_to @post, notice: 'Post was successfully created.’ else render ‘new’ end end

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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)

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def create @post = Post.new(post_params) if @post.save else render ‘new’ end end

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Started POST "/posts" for ::1 at 2016-06-02 09:25:11 -0400 Processing by PostsController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"RC46YER7l5yQz1J+DkZIWINBixkaMz9qWWlFzvZT8K3Ksy9IgwADsicHRAryn 4hDYunAZZBLeLZ8OcOBicheCA==", "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)

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Don’t forget to respond

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Don’t forget to me

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ActionController Parameters no longer inherits from hash ⚠

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Action Controller Parameters decide what to permit and what to not

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user_params.is_a? Hash #=> true

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user_params.is_a? ActionController::Parameters #=> true

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user_params.to_h # Safe hash

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user_params.to_unsafe_h # Unsafe hash

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>> user_params.inject DEPRECATION WARNING: Method inject is deprecated and will be removed in Rails 5.1, as `ActionController::Parameters` no longer inherits from hash. Using this deprecated behavior exposes potential security problems. If you continue to use this method you may be creating a security vulnerability in your app that can be exploited. Instead, consider using one of these documented methods which are not deprecated: http://api.rubyonrails.org/v5.0.0/classes/ActionController/ Parameters.html

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Fragment Caching Action Mailer views

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Fragment Caching Action Mailer views

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config.action_mailer.perform_caching = true

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<% cache 'signup-text' do %>

Welcome!

You have successfully signed up. Your username is:
<% end %> <%= @user.login %>.

<%= render :partial => 'footer' %>

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<% cache 'signup-text' do %>

Welcome!

You have successfully signed up. Your username is:
<% end %> <%= @user.login %>.

<%= render :partial => 'footer' %>

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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