code: def modelrepr(instance) -> str:
      
      elements = []
      # noinspection PyProtectedMember
      for f in instance._meta.get_fields():
          # https://docs.djangoproject.com/en/2.0/ref/models/meta/
          if f.auto_created:
              continue
          if f.is_relation and f.related_model is None:
              continue
          fieldname = f.name
          try:
              value = repr(getattr(instance, fieldname))
          except ObjectDoesNotExist:
              value = "<RelatedObjectDoesNotExist>"
          elements.append("{}={}".format(fieldname, value))
      return "<{} <{}>>".format(type(instance).__name__,
                                ", ".join(elements))
docs: Default ``repr`` version of a Django model object, for debugging.