Rails Concern to create a bunch of downcased getter methods

gistfile1.rb

module Downcaseable
  extend ActiveSupport::Concern
  module ClassMethods
    def downcase_field(*names)
      Array(names).flatten.each do
        class_eval %Q(
          def #{name}_eval
            send(:#{name}).try(:downcase)
          end
        )
      end
    end
  end
end

class Person
  include Downcaseable
  downcaseable :name, :hometown, :college
  searchable do
    string :name_downcase
    string :hometown_downcase
    string :college_downcase
  end
end

class Article
  include Downcaseable
  downcaseable :category_name, :author_name
  searchable do
    string :author_name_downcase
    string :category_name_downcase
  end
end