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ncolgan/gist:2786710

Created May 25, 2012 08:48
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gistfile1.rb
class Plan < ActiveRecord::Base
@@sub_classes = []
cattr_reader :sub_classes
def self.inherited(child)
@@sub_classes << child
end
end
class FreePlan < Plan
end
class PaidPlan < Plan
end
# This should now return [FreePlan, PaidPlan]
Plan.sub_classes
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