I just implemented very simple and primitive class table inheritance in ActiveRecord. The goal is for this to become mature enough to become a true feature in Rails. Check it out here:
http://guest@blog.raylucke.com/svn/inherits_from
Here’s how it looks in action:
create_table “books”, :force => true do |t|
t.column “product_id”, :integer
t.column “pages”, :integer
t.column “author”, :string
end
create_table [...]