47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 OpenStack LLC.
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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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from sqlalchemy import Column, Integer, MetaData, String, Table
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meta = MetaData()
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instances = Table('instances', meta,
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Column('id', Integer(), primary_key=True, nullable=False),
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)
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instances_os_type = Column('os_type',
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String(length=255, convert_unicode=False,
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assert_unicode=None, unicode_error=None,
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_warn_on_bytestring=False),
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nullable=True)
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def upgrade(migrate_engine):
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# Upgrade operations go here. Don't create your own engine;
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# bind migrate_engine to your metadata
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meta.bind = migrate_engine
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instances.create_column(instances_os_type)
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migrate_engine.execute(instances.update()\
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.where(instances.c.os_type == None)\
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.values(os_type='linux'))
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def downgrade(migrate_engine):
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meta.bind = migrate_engine
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instances.drop_column('os_type')
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