Fix mongoid deeply nested polimorphic

Got the commit from github. The roles and sub_roles save.

app/models/user/attribute.rb

@@ -9,7 +9,6 @@ class Attribute
   
   has_many :attribute_fields, :autosave => true, :dependent => :destroy
   has_one :i18n_variable, :as => :language_value, :autosave => true, :dependent => :destroy
-  accepts_nested_attributes_for :i18n_variable, :allow_destroy => true
   accepts_nested_attributes_for :attribute_fields, :allow_destroy => true
   
   def is_built_in?

app/models/user/attribute_field.rb

@@ -13,8 +13,8 @@ class AttributeField
   belongs_to :attribute
   has_one :i18n_variable, :as => :language_value, :autosave => true, :dependent => :destroy
   has_many :attribute_values
+  
   validates_uniqueness_of :key
-  accepts_nested_attributes_for :i18n_variable, :allow_destroy => true
   
   # Convert the string list_options into an array
   def select_list_options=(var)