Rails 4.0 has yet to be released, but since it might be here by Christmas, it’s time to start getting ready.
Some Rails 4.0 features can be used today, and I describe how in the whirlwind tour I recently put together for the Atlanta Ruby Users Group.
Russian Doll Caching (cache_digests)
Extraction of activeresource
ActiveRecord::Relation changes and improvements
Removal of plugin support (not gems; only those that are installed in vendor/plugins)
Removal of Rails 2 finder syntax
Deprecation of most dynamic finders
Deprecation of eager-evaluated scopes
Wanting to learn Ruby on Rails? Come to the next Beginning Ruby on Rails Bootcamp, Jan. 26-Feb. 1 at the Atlanta Ranch.