Upgrading Rails Redux

A refresh of my talk on upgrading Rails.

Transcript

1. Upgrading Rails Redux
2. Who has a Rails app in production?
3. Rails 1.x
4. Rails 2.x
5. Rails 3.x
7. Porting to Rails 4 Sometimes the new code still works in old version of Rails.
 
 scope :sorted, order(“updated_at")
 
 scope :sorted, -> { order("updated_at") }
8. Porting to Rails 4 Otherwise branch?
9. Dual-boot Rails # Gemfile def rails4?
 ENV["RAILS4"] == '1'
 end RAILS4=1 rails s
10. # Gemfile
 
 if rails4?
 gem "rails", “4.0.5" # protected_attributes, etc.
 else
 gem "rails", "3.2.18"
 end Dual-boot Rails
11. 
 # config/environments/test.rb
 
 ActiveSupport::Deprecation.silenced = true if rails4?
 Dual-boot Rails
12. RailsDiff
13. Incremental progress • Boot Server • Run Tests (Rails 3 & 4) • Passing Tests • QA • Switch Default Rails
14. whoops • Non-digest images in emails, use public/ • Blocks iframe embedding
 response.headers.except! ‘X-Frame-Options' • Endpoints
 protect_from_forgery exceptions (CSRF)
 xml_data = Hash.from_xml(request.body.read) • Threading bug in activerecord-session_store
15. if rails_master?
 # gem "rails", :github => "rails/rails", :branch => "4-2-stable"
 gem "rails", "5.0.0.beta1"
 else
 gem "rails", "4.2.5"
 end
16. Resources • https://github.com/discourse/discourse/ blob/master/Gemfile • http://railsdiff.org/ • https://speakerdeck.com/nathany/ upgrading-rails-redux
17. Gopher Gala edmontongo.org
18. https://yng.mn/39youngman