from rest_framework import status from rest_framework.exceptions import APIException class LabelValidationError(APIException): status_code = status.HTTP_400_BAD_REQUEST default_detail = 'You cannot create a label with same name or shortcut key.' class AnnotationRelationValidationError(APIException): status_code = status.HTTP_400_BAD_REQUEST default_detail = 'You cannot create an annotation relation between the same annotation.'