multilingual_module.rb

module MultilingualModule
  def self.define_ml_methods_for(attrs)
    languages = APP_CONFIG[:languages].split(/\|/)
    attrs.each do |method|
      define_method('ml_' + method) do |*args|
        yml = YAML.load(send("#{method}_ml").to_s)
        hash = yml ? yml : {}
        languages.each do |lang|
          hash[lang.to_sym] = "" unless hash[lang.to_sym]
        end
        hash
      end
      define_method(method) do |*args|
        ml_values = send "ml_#{method}"
        ml_values[I18n.locale.to_sym]
      end
    end

    attrs.each do |method|
      languages.each do |lang|
        define_method("#{method}_#{lang}") do |*args|
          ml_values = send "ml_#{method}"
          ml_values[lang.to_sym]
        end

        define_method("#{method}_#{lang}=") do |value, *args|
          ml_values = send "ml_#{method}"
          ml_values[lang.to_sym] = value
           send "#{method}_ml=", ml_values.to_yaml 
        end
      end
    end 
  end
end