manila/manila/db/migrations/alembic/versions/3db9992c30f3_transform_stat...

58 lines
1.7 KiB
Python

# Copyright 2015 Mirantis Inc.
# All Rights Reserved.
#
# 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.
"""Transform statuses to lowercase
Revision ID: 3db9992c30f3
Revises: 533646c7af38
Create Date: 2015-05-28 19:30:35.645773
"""
# revision identifiers, used by Alembic.
revision = '3db9992c30f3'
down_revision = '533646c7af38'
from alembic import op
import sqlalchemy as sa
from manila.db.migrations import utils
def upgrade():
# NOTE(vponomaryov): shares has some statuses as uppercase, so
# transform them in addition to statuses of share servers.
for table in ('shares', 'share_servers'):
_transform_case(table, make_upper=False)
def downgrade():
# NOTE(vponomaryov): transform share server statuses to uppercase and
# leave share statuses as is.
_transform_case('share_servers', make_upper=True)
def _transform_case(table_name, make_upper):
connection = op.get_bind()
table = utils.load_table(table_name, connection)
case = sa.func.upper if make_upper else sa.func.lower
for row in connection.execute(table.select()):
op.execute(
table.update().where( # pylint: disable=no-value-for-parameter
table.c.id == row.id
).values({'status': case(row.status)})
)