class SomeORM
  def self.attributes(*names)
    if const_defined?(:DynamicAttributes, false)
      mod = const_get(:DynamicAttributes)
    else
      mod = const_set(:DynamicAttributes, Module.new)
      include mod      
    end
    mod.module_eval do
      names.each do |name|
        define_method(name) do
          # Stuff
        end
      end
    end
  end
end