Here’s a list of the major new features in Rails v2.3 (most recent first):
Rails 2.3 Features
- Batched find
- Nested Model Mass Assignment
- HTTP Digest Authentication
- Dynamic Scopes
- Application Generators
- Rails Metal
- No More Formatted Routes
- Object.try
- Simplified render
- application.rb Becomes application_controller.rb
- Default Scoping
The next scheduled release appears to be the 3.0 release, the merger of Rails and Merb. The core team has alluded to at least a preview release to be ready by RailsConf 2009. Seems a bit aggressive for all the internal tinkering in store, but stay here for for the latest.
You should also check out the Rails 2.3 release notes for the ‘official’ rundown of new features for 2.3.
tags: ruby, rubyonrails

Why are you saying Rails 2.3 released? This is RC1 and DHH says it will be a while for testing. The title seems to be a bit misleading…just sayin’.
Great 2.3 coverage BTW, look forward to all the posts.
The first link
- Nested Model Assignment -is broken… gives me an “uh oh” page.Whoops… darn textile… two hyphens is dash, dangit.
Its a good morining if it starts with a new rails version, now comes the migration headaches :)
Can somebody shed some light on the new Rails Engines ?
found some info here: http://guides.rubyonrails.org/2_3_release_notes.html
Here’s some info on Engines: http://rails-engines.org/news/2009/02/02/engines-in-rails-2-3/