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I''m currently coding a system which must store multiple contact methods for a user (phone, email, postal address etc). I''m planning a fairly straightforward inheritance hierachy for these, where each different method inherits from something like a ContactMethod class. The only mention of ActiveRecord support for inheritance I can find in the Wiki and the Agile Web Dev book is

Hi, My application has a table of People that has information about them, and I want to have a subset of those people as Users - people that can login to the application. What is the best way to do this? Add columns to People that only Users would use? I''ve read the threads on single table inheritance, but it seemed a little bit wasteful: 10,000 people vs 50 users For those more