gistfile1.rb

require 'i18n'
require 'arel'

module ModelTranslate
  def self.included(base)
    base.send :extend, Base
  end

  module Base
    def translations *methods
      methods.each do |method|
        I18n.available_locales.each do |locale|
          if ActiveRecord::Base.connection.column_exists? self.arel_table.name.to_sym, "#{method}_#{locale}".to_sym
            class_eval <<-EOS, __FILE__, __LINE__

              def #{method}
                begin
                  res = send "#{method}_\#\{I18n.locale\}".to_sym
                  res.size > 0 ? res : send("#{method}_\#\{I18n.default_locale\}".to_sym)
                rescue
                  send "#{method}_\#\{I18n.default_locale\}".to_sym 
                end
              end

              def #{method}= *args
                begin
                  res = send "#{method}_\#\{I18n.locale\}=".to_sym, *args
                  res.size > 0 ? res : send("#{method}_\#\{I18n.default_locale\}=".to_sym, *args)
                rescue
                  send "#{method}_\#\{I18n.default_locale\}=".to_sym, *args
                end
              end

            EOS
          end
        end
      end
    end
  end

end