Composite Primary Keys for ActiveRecords
Summary:
ActiveRecords/Rails famously doesn't support composite primary keys.
For 2 years there has been no support for this aspect of legacy databases.
This project will be a fully-featured solution and I welcome use cases and
legacy DB schema samples to help make the project work with as many common
legacy environments as possible.

Url:
http://compositekeys.rubyforge.org

Questions and Discussion:
http://groups.google.com/compositekeys

Written by Dr Nic Williams, drnicwilliams@gmail