album.rb

class Album < ActiveRecord::Base
  has_many :images
  belongs_to :gallery, :polymorphic => true
  attr_accessible :title
end

category.rb

class Category < ActiveRecord::Base
  attr_accessible :name
end

description.rb

class Description < ActiveRecord::Base
  belongs_to :language
  belongs_to :localized, :polymorphic => true
  attr_accessible :contents
end

event.rb

class Event < ActiveRecord::Base
  has_one :album, :as => :gallery
  has_many :descriptions, :as => :localized
  has_many :contact_informations, :class_name => "General_field"
  has_many :related_links, :class_name => "General_field"
  belongs_to :category
  attr_accessible :date, :fee, :location, :teaser
end

general_field.rb

class General_field < ActiveRecord::Base
  attr_accessible :label, :contents
end

image.rb

class Image < ActiveRecord::Base
  belongs_to :album
  attr_accessible :title, :path
end

language.rb

class Language < ActiveRecord::Base
  attr_accessible :name, :shortcode # Name in diff languages? This is n^2 worth of names
end