code: def _initialize(self):
          '''
          We override _initialize, as we want to resolve the field each time
          '''
          if self._field_name:
              self._field = self.resolve_field(self._field_name)
          if not self._field:
              raise KittyException('Could not resolve field name %s' % self._field_namef _initialize(self):
          '''
          We override _initialize, as we want to resolve the field each time
          '''
          if self._field_name:
              self._field = self.resolve_field(self._field_name)
          if not self._field:
              raise KittyException('Could not resolve field name %s' % self._field_name)
docs: We override _initialize, as we want to resolve the field each time