code: def get_fields_from_model(self, model, fields):
          
          model_fields = {}
          for field in fields:
                  if isinstance(field, tuple) and len(field) == 2:
                      field, verbose_name = field[0], field[1]
                  else:
                      try:
                          model_field = get_fields_from_path(model, field)[-1]
                          verbose_name = model_field.verbose_name
                      except (FieldDoesNotExist, IndexError, TypeError) as e:
                          logger.warn("AdvancedFilterForm: skip invalid field "
                                      "- %s", e)
                          continue
                  model_fields[field] = verbose_name
          return model_fields
docs: Iterate over given <field> names (in "orm query" notation) and find
          the actual field given the initial <model>.
  
          If <field> is a tuple of the format ('field_name', 'Verbose name'),
          overwrite the field's verbose name with the given name for display
          purposes.