def __repr__(self):
        return "<NamedRequirements({}{})>".format(
            self.name,
            ", filename='{}'".format(self.filename.name) if self.filename
            else "")
def detail_export(self, request, pk=None):
        serializer = ConditionExportSerializer(self.get_object())
        xml = ConditionRenderer().render([serializer.data])
        return XMLResponse(xml, name=self.get_object().key)