Embed attribute_fields and sub_roles

app/models/user/attribute_field.rb

@@ -10,7 +10,7 @@ class AttributeField
   field :built_in, :type => Boolean, :default => false
   field :disabled, :type => Boolean, :default => false
   
-  belongs_to :attribute
+  embedded_in :attribute
   has_one :i18n_variable, :as => :language_value, :autosave => true, :dependent => :destroy
   has_many :attribute_values