lib/active_model/observing.rb in activemodel-3.1.12 vs lib/active_model/observing.rb in activemodel-3.2.0.rc1

@@ -185,11 +185,10 @@
     class << self
       # Attaches the observer to the supplied model classes.
       def observe(*models)
         models.flatten!
         models.collect! { |model| model.respond_to?(:to_sym) ? model.to_s.camelize.constantize : model }
-        remove_possible_method(:observed_classes)
-        define_method(:observed_classes) { models }
+        redefine_method(:observed_classes) { models }
       end
 
       # Returns an array of Classes to observe.
       #
       # You can override this instead of using the +observe+ helper.