37 Signals announced today that the second release candidate for Ruby on Rails 3.0 has been released. Ruby on Rails 3.0 RC2 has relatively few changes to it which indicates that a final release is imminent unless major issues are found soon. Reviewing the changes on git it appears that 356 commits were made by 64 authors in the process of producing RC2. Rails 3.0 now has it’s own stable branch on git found with the master branch now pointing to rails 3.1

To update or install Ruby on Rails 3.0 RC2 through gem use:

gem install rails –pre

To update through Bundler edit your Gemfile and set the gem entry as:

gem ‘rails’, ’3.0.0.rc2′

The Rails 3 RC was just released moments ago. If you have been testing out Rails 3 Beta 4, now is a great time to upgrade and see what’s changed. Engine Yard’s appCloud has also updated their technology stack to now support Rails 3 RC.

Since Beta 4, 125 authors have made over 840 commits to the code base.