gistfile1.rb

class BuildPropertyAssociationsOnExports < ActiveRecord::Migration
 
  ...
  
  class Property < ActiveRecord::Base
    attr_accessible :hierarchical
    def enumerated?
      if defined?(super)
        super
      else
        hierarchichal?
      end
    end
  end 
  ...
  
  def up
    ActiveRecord::Base.connection.schema_cache.clear!
    Property.find_each do |property|
      if property.enumerated?
        # Do something interesting 
      else
        # Do something less interesting
      end 
    end
  end
  ...
end