a modern, lightweight mysql ORM for ruby 1.9
- uses ARel for query generation
- uses MySQL2 eventmachine driver for asynchronous I/O
- supports partial updates and dirty tracking
- zero-copy attribute loading
- small runtime footprint
- designed for use with Rack::FiberPool for transparent, non-blocking access to mysql without need for callbacks/CPS
- validations (you shouldn't be encoding your business logic in your persistence layer anyway)
- migrations - ActiveRecord::Migrations is a fantastic migration toolkit - use it!