79 lines
2.4 KiB
Python
79 lines
2.4 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack LLC.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import sqlalchemy
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from sqlalchemy import select, Column, ForeignKey, Integer, String
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from nova import log as logging
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LOG = logging.getLogger('nova.db.sqlalchemy.migrate_repo.versions')
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meta = sqlalchemy.MetaData()
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def _get_table(name):
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return sqlalchemy.Table(name, meta, autoload=True)
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def upgrade(migrate_engine):
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meta.bind = migrate_engine
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instance_actions = _get_table('instance_actions')
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instances = _get_table('instances')
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uuid_column = Column('instance_uuid', String(36),
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ForeignKey('instances.uuid'))
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uuid_column = Column('instance_uuid', String(36))
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uuid_column.create(instance_actions)
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try:
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instance_actions.update().values(
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instance_uuid=select(
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[instances.c.uuid],
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instances.c.id == instance_actions.c.instance_id)
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).execute()
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except Exception:
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uuid_column.drop()
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raise
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if migrate_engine.name == "mysql":
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try:
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migrate_engine.execute("ALTER TABLE instance_actions " \
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"DROP FOREIGN KEY instance_actions_ibfk_1;")
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except Exception: # Don't care, just fail silently.
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pass
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instance_actions.c.instance_id.drop()
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def downgrade(migrate_engine):
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meta.bind = migrate_engine
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instance_actions = _get_table('instance_actions')
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instances = _get_table('instances')
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id_column = Column('instance_id', Integer, ForeignKey('instances.id'))
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id_column.create(instance_actions)
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try:
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instance_actions.update().values(
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instance_id=select(
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[instances.c.id],
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instances.c.uuid == instance_actions.c.instance_uuid)
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).execute()
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except Exception:
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id_column.drop()
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raise
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instance_actions.c.instance_uuid.drop()
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