querysets.py 文件源码

def with_status_name(self):
        case = Case(output_field=models.CharField())
        for status_value in self.model.STATUS._db_values:
            case.cases.append(
                When(status=status_value, then=Value(str(self.model.STATUS[status_value]))),
            )
        return self.annotate(status_name=case)