lib/scrivito/basic_obj.rb in scrivito_sdk-1.3.0.rc2 vs lib/scrivito/basic_obj.rb in scrivito_sdk-1.3.0.rc3

@@ -18,9 +18,11 @@
   #   Always use {Obj} or a subclass of {Obj}.
   # @see http://scrivito.com/objects-widgets-classes CMS objects, widgets, and classes
   # @api public
   #
   class BasicObj
+    extend ::ActiveSupport::DescendantsTracker
+
     PublicSystemAttributeDefinition = Class.new(AttributeDefinition)
 
     SYSTEM_ATTRIBUTES = AttributeDefinitionCollection.new(
       '_id'           => PublicSystemAttributeDefinition.new(:_id, :string),
       '_last_changed' => PublicSystemAttributeDefinition.new(:_last_changed, :date),