Quick correction, so that nil repeatitions will not generate an exception

app/models/event_callbacks.rb

@@ -16,7 +16,7 @@ class EventCallbacks
   def self.before_update(event)
     return unless event.moderated_changed? && event.moderated?
     event.decision_time = Time.zone.now
-    create_repeats event if event.repeat > 0 && event.rule
+    create_repeats event if event.repeat.try(:positive?) && event.rule
   end
 
   def self.after_update(event)