Basic generic products db

Here is a basic design for a generic product database using STI. This allows different kinds of things to be gropuped by class and inherited normally, and makes it easy to have different associations/association rules on similiar things. Something like a cart, is an order by another name, and just has to be re-typed into something like CompletedOrder when completed.

A handy hash method

I am testing posting code :)


class Hash
def except(*arr)
hsh = self.dup
arr.each do |k|
hsh.delete(k)
end
hsh
end
end


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