I understand what you are doing technically ;-) But I want to know your reasoning. In rails, if you want to store/return data relevant to a model(class), you usually use a class method. The keyword is [self](http://www.jimmycuadra.com/posts/self-in-ruby)
```ruby
Class Event<ActiveRecord::Base
  def self.media_types
    media_types = %w(YouTube SlideShare Flickr Vimeo Speakerdeck Instagram)
    return media_types
  end
end
```