announcement-test/app/models/bulletin_file.rb

# encoding: utf-8
class BulletinFile

  include Mongoid::Document
  include Mongoid::Timestamps

  mount_uploader :file, AssetUploader

  field :description, localize: true
  field :title, localize: true
  field :choose_lang, :type => Array, :default => ["en","zh_tw"]
  
  belongs_to :bulletin


  def enabled_for?(lang)
  	if lang.nil?
  		return true
  	else
  		return self.choose_lang.include?(lang)
  	end
  end

end