gistfile1.rb

module ActiveRecord
  module NamedScope
    class Scope
      def conditions
        @conditions ||= begin
          all_conditions = []
          scope = self
          while scope.class == self.class
            all_conditions << scope.proxy_options[:conditions]
            scope = scope.proxy_scope
          end
          merge_conditions(*all_conditions)
        end
      end
    end
  end
end