Rails 3.1

rails31.md

Rails 3.1 overview

• https://gist.github.com/958283
• https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/milestones/71470-31
• http://hemju.com/2011/02/23/rails-3-1-release-rumors-and-news-about-features/
• http://www.hagenburger.net/TALKS/rails-3.1-frontend-performance.html#slide1

Railtie

Console shows SQL queries right there.

JQuery & RJS out

• http://weblog.rubyonrails.org/2011/4/21/jquery-new-default

Asset Template Engine: SCSS, CoffeeScript

• http://getsprockets.org/
• http://www.rubyinside.com/rails-3-1-adopts-coffeescript-jquery-sass-and-controversy-4669.html
• http://jackdempsey.me/2011/04/22/rails-3-1-sprockets-and-coffeescript.html

Rack::Cache

Add Rack::Cache to the default stack. Create a Rails store that delegates to the Rails cache, so by default, whatever caching layer you are using will be used for HTTP caching. Note that Rack::Cache will be used if you use #expires_in, #fresh_when or #stale with :public => true. Otherwise, the caching rules will apply to the browser only. [Yehuda Katz, Carl Lerche]

Mountable Engines

• http://piotrsarnacki.com/2010/09/14/mountable-engines/
• http://www.builtfromsource.com/2010/12/13/mountable-engines-in-rails-3-1-beta-getting-started/

ActionPack

Http Streaming

• http://weblog.rubyonrails.org/2011/4/18/why-http-streaming
• http://yehudakatz.com/2010/09/07/automatic-flushing-the-rails-3-1-plan/

Template Inheritance

• http://edgerails.info/articles/what-s-new-in-edge-rails/2011/01/12/template-inheritance/index.html

force_ssl

• http://www.simonecarletti.com/blog/2011/05/configuring-rails-3-https-ssl/

automatically adds :multipart => true to the enclosing form.

ActionController::ParamsWrapper

...

ActionView

form_for method

form_for(@post, remote: true, method: :delete) instead of form_for(@post, remote: true, html: { method: :delete })

j helper

Make JavaScriptHelper#j() an alias for JavaScriptHelper#escape_javascript()

HTML5 data-* attributes

tag("div", :data => {:name => 'Stephen', :city_state => %w(Chicago IL)}) =>

file_field

ActiveRecord&ActionModel

Identity Map

• http://edgerails.info/articles/what-s-new-in-edge-rails/2011/04/21/activerecord-identity-map/index.html

SecurePassword

• http://bcardarella.com/post/4668842452/exploring-rails-3-1-activemodel-securepassword

new mass assignment capabilities

attr_accessible :title, :published_at, :as => :admin Post.new(params[:post], :as => :admin)

assign_attributes() with similar API was also added and attributes=(params, guard) was deprecated.

update_column

update_column method on ActiveRecord. This new method updates a given attribute on an object, skipping validations and callbacks.

migration

class MyMigration < ActiveRecord::Migration def change create_table(:horses) do t.column :content, :text t.column :remind_at, :datetime end end end

Migrations should use instance methods rather than class methods: