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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 OpenStack LLC.
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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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# http://www.apache.org/licenses/LICENSE-2.0
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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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from sqlalchemy import Index, MetaData, Table
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from sqlalchemy.exc import IntegrityError
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def upgrade(migrate_engine):
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meta.bind = migrate_engine
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t = Table('block_device_mapping', meta, autoload=True)
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# Based on block_device_mapping_update_or_create
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# from: nova/db/sqlalchemy/api.py
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i = Index('block_device_mapping_instance_uuid_device_name_idx',
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t.c.instance_uuid, t.c.device_name)
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i.create(migrate_engine)
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except IntegrityError:
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# Based on block_device_mapping_update_or_create
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# from: nova/db/sqlalchemy/api.py
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'block_device_mapping_instance_uuid_virtual_name_device_name_idx',
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t.c.instance_uuid, t.c.virtual_name, t.c.device_name)
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i.create(migrate_engine)
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# Based on block_device_mapping_destroy_by_instance_and_volume
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# from: nova/db/sqlalchemy/api.py
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i = Index('block_device_mapping_instance_uuid_volume_id_idx',
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t.c.instance_uuid, t.c.volume_id)
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i.create(migrate_engine)
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except IntegrityError:
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def downgrade(migrate_engine):
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meta.bind = migrate_engine
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t = Table('block_device_mapping', meta, autoload=True)
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i = Index('block_device_mapping_instance_uuid_device_name_idx',
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t.c.instance_uuid, t.c.device_name)
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i.drop(migrate_engine)
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'block_device_mapping_instance_uuid_virtual_name_device_name_idx',
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t.c.instance_uuid, t.c.virtual_name, t.c.device_name)
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i.drop(migrate_engine)
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i = Index('block_device_mapping_instance_uuid_volume_id_idx',
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t.c.instance_uuid, t.c.volume_id)
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i.drop(migrate_engine)