Asset changes, add description

app/models/asset.rb

@@ -7,17 +7,39 @@ class Asset
 
   field :filename
   field :description
+
+  has_one :title, :class_name => "I18nVariable", :as => :language_value, :autosave => true, :dependent => :destroy
+  has_one :description, :class_name => "I18nVariable", :as => :language_value, :autosave => true, :dependent => :destroy
   
-  has_one :i18n_variable, :as => :language_value, :autosave => true, :dependent => :destroy
-  
-  validates_presence_of :filename, :data, :asset_category_id
+  validates_presence_of :title, :data, :description
 
   belongs_to :asset_category
   belongs_to :assetable, polymorphic: true
   has_and_belongs_to_many :tags, :class_name => "AssetTag"
 
+  before_save :set_key
+
+  def title
+    @title ||= I18nVariable.first(:conditions => {:key => 'title', :language_value_id => self.id, :language_value_type => self.class}) rescue nil
+  end
+
+  def description
+    @description ||= I18nVariable.first(:conditions => {:key => 'description', :language_value_id => self.id, :language_value_type => self.class}) rescue nil
+  end
+
   def sorted_tags
     tags.order_by(I18n.locale, :asc)
   end
+
+  protected
+  
+  def set_key
+    if title.new_record?
+      title.key = 'title'
+    end
+    if description.new_record?
+      description.key = 'description'
+    end
+  end
   
 end