95 lines
2.8 KiB
Python
95 lines
2.8 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright 2012 OpenStack LLC.
|
|
# Copyright 2012 SolidFire 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.
|
|
|
|
from migrate import ForeignKeyConstraint
|
|
from sqlalchemy import MetaData, Integer, String, Table
|
|
from sqlalchemy import select, Column
|
|
|
|
from nova.openstack.common import log as logging
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
def upgrade(migrate_engine):
|
|
meta = MetaData()
|
|
meta.bind = migrate_engine
|
|
|
|
instances = Table('instances', meta, autoload=True)
|
|
volumes = Table('volumes', meta, autoload=True)
|
|
instance_uuid_column = Column('instance_uuid', String(36))
|
|
|
|
instance_uuid_column.create(volumes)
|
|
try:
|
|
volumes.update().values(
|
|
instance_uuid=select(
|
|
[instances.c.uuid],
|
|
instances.c.id == volumes.c.instance_id)
|
|
).execute()
|
|
except Exception:
|
|
instance_uuid_column.drop()
|
|
|
|
fkeys = list(volumes.c.instance_id.foreign_keys)
|
|
if fkeys:
|
|
try:
|
|
fk_name = fkeys[0].constraint.name
|
|
ForeignKeyConstraint(
|
|
columns=[volumes.c.instance_id],
|
|
refcolumns=[instances.c.id],
|
|
name=fk_name).drop()
|
|
|
|
except Exception:
|
|
LOG.error(_("foreign key could not be dropped"))
|
|
raise
|
|
|
|
volumes.c.instance_id.drop()
|
|
|
|
|
|
def downgrade(migrate_engine):
|
|
meta = MetaData()
|
|
meta.bind = migrate_engine
|
|
|
|
instances = Table('instances', meta, autoload=True)
|
|
volumes = Table('volumes', meta, autoload=True)
|
|
instance_id_column = Column('instance_id', Integer)
|
|
|
|
instance_id_column.create(volumes)
|
|
try:
|
|
volumes.update().values(
|
|
instance_id=select(
|
|
[instances.c.id],
|
|
instances.c.uuid == volumes.c.instance_uuid)
|
|
).execute()
|
|
except Exception:
|
|
instance_id_column.drop()
|
|
|
|
fkeys = list(volumes.c.instance_id.foreign_keys)
|
|
if fkeys:
|
|
try:
|
|
fk_name = fkeys[0].constraint.name
|
|
ForeignKeyConstraint(
|
|
columns=[volumes.c.instance_id],
|
|
refcolumns=[instances.c.id],
|
|
name=fk_name).create()
|
|
|
|
except Exception:
|
|
LOG.error(_("foreign key could not be created"))
|
|
raise
|
|
|
|
volumes.c.instance_uuid.drop()
|