From: Andrew Thompson <vagabond@...>
Date: 2006-04-12T00:20:56+09:00
Subject: Re: class variables and inheritance (ActiveRecord problem)

Stephen Bannasch wrote:

> I'd like to be able to create a class variable that will apply to all
> objects made from that class and ALSO create a derived class with a
> different class variable that is used in objects created from the
> derived class WITHOUT affecting the class variable defined in the
> original class.

Try a class instance  variable vs a class variable:

class C
    @somevar = 'x'
    class << C
        def somevar
            @somevar
        end

        def somevar=(var)
            @somevar=var
        end
    end
end

Its not as easily accessible as a class variable (only accessible from
class methods) and you'd have to initialize it to something in derived
classes (otherwise it's nil) but its non-inherited. Not totally what you
want, but maybe it'll help.

Andrew

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