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# Licensed 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.
import sqlalchemy as sql
_SP_TABLE_NAME = 'service_provider'
def _update_null_columns(migrate_engine, sp_table):
stmt = (sp_table.update().
where(sp_table.c.auth_url.is_(None)).
values(auth_url=''))
migrate_engine.execute(stmt)
stmt = (sp_table.update().
where(sp_table.c.sp_url.is_(None)).
values(sp_url=''))
migrate_engine.execute(stmt)
def upgrade(migrate_engine):
meta = sql.MetaData()
meta.bind = migrate_engine
sp_table = sql.Table(_SP_TABLE_NAME, meta, autoload=True)
# The columns are being changed to non-nullable. To prevent
# database errors when both are altered, all the existing
# null-records should be filled with not null values.
_update_null_columns(migrate_engine, sp_table)
sp_table.c.auth_url.alter(nullable=False)
sp_table.c.sp_url.alter(nullable=False)
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