Today I upgraded to Rails 1.2.6 as I prepare to move towards Rails 2.0. Notes on this release can be found here.

Here are the steps I took.

  1. Upgrade Ruby Gems to the latest version (in this case 1.0.1).
    gem update --system
  2. Upgrade Ruby on Rails to the latest version (in this case 2.0.2).
    gem install rails
    To specify upgrading to Ruby on Rails 1.2.6 do this.
    gem install rails -v 1.2.6
    (What I probably should have done was a gem update because now I have installed 1.2.6 and 1.2.3.)
  3. Update configuration.
    set RAILS_GEM_VERSION to ‘1.2.6’ in config/environment.rb
    rake rails:update:configs