h2. Ruby on Rails 3.0 Release Notes

Rails 3.0 is a landmark release as it delivers on the Merb/Rails merge promise made in December, 2008.  Rails 3.0 provides many major upgrades to all of the major components of Rails, and now adds Active Model ORM abstraction as well as a consistent Plugin API giving developers full access to all the Rails internals that make Action Mailer, Action Controller, Action View, Active Record and Active Resource work.  These release notes cover the major upgrades, but doesn't include every little bug fix and change. If you want to see everything, check out the "list of commits":http://github.com/rails/rails/commits/master in the main Rails repository on GitHub or review the +CHANGELOG+ files for the individual Rails components.

endprologue.

h3. Application Creation


h3. Application Architecture


h3. Documentation


h3. Ruby 1.9.1 Support


h3. Railties


h3. Action Controller


h3. Action Dispatch


h3. Action Pack


h3. Action View


h3. Active Model


h3. Active Record


h3. Active Resource


h3. Action Mailer


h3. Deprecated


h3. Credits

Release notes compiled by "Mikel Lindsaar":http://lindsaar.net. This version of the Rails 3.0 release notes was compiled based on Rails version...