| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| from flask_babel import lazy_gettext as _ |
| from sqlalchemy import not_, or_ |
| from sqlalchemy.orm.query import Query |
| |
| from superset.connectors.sqla.models import SqlaTable |
| from superset.views.base import BaseFilter |
| |
| |
| class DatasetIsNullOrEmptyFilter(BaseFilter): # pylint: disable=too-few-public-methods |
| name = _("Null or Empty") |
| arg_name = "dataset_is_null_or_empty" |
| |
| def apply(self, query: Query, value: bool) -> Query: |
| filter_clause = or_(SqlaTable.sql.is_(None), SqlaTable.sql == "") |
| |
| if not value: |
| filter_clause = not_(filter_clause) |
| |
| return query.filter(filter_clause) |