code: def create_update_event(self):
          
          events = []
  
          for fields, rules in iteritems(self._meta.update_messages):
              if not isinstance(fields, (list, tuple, set)):
                  fields = (fields,)
  
              changed = any([
                  getattr(self, field) != getattr(self.get_original(), field)
                  for field in fields
              ])
  
              if changed:
                  event = self.create_audit_event(code=rules['code'])
                  event.body = rules['message']
                  event.meta = self.parse_meta(rules['meta'])
                  events.append(event)
  
          self.update_event_callback(events)
  
          with db.database.atomic():
              for event in events:
                  event.save()
  
          return events
docs: Parse the update messages DSL to insert the data into the Event.
  
          Returns:
              list[fleaker.peewee.EventStorageMixin]:
                  All the events that were created for the update.