85 lines
3.1 KiB
Python
85 lines
3.1 KiB
Python
# Copyright 2012 OpenStack Foundation
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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 ForeignKey
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from sqlalchemy.schema import Column
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from sqlalchemy.schema import MetaData
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from sqlalchemy.schema import UniqueConstraint
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from trove.db.sqlalchemy.migrate_repo.schema import Boolean
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from trove.db.sqlalchemy.migrate_repo.schema import create_tables
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from trove.db.sqlalchemy.migrate_repo.schema import drop_tables
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from trove.db.sqlalchemy.migrate_repo.schema import String
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from trove.db.sqlalchemy.migrate_repo.schema import Table
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from trove.db.sqlalchemy import utils as db_utils
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meta = MetaData()
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datastores = Table(
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'datastores',
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meta,
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Column('id', String(36), primary_key=True, nullable=False),
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Column('name', String(255), unique=True),
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Column('manager', String(255), nullable=False),
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Column('default_version_id', String(36)),
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)
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datastore_versions = Table(
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'datastore_versions',
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meta,
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Column('id', String(36), primary_key=True, nullable=False),
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Column('datastore_id', String(36), ForeignKey('datastores.id')),
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Column('name', String(255), unique=True),
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Column('image_id', String(36), nullable=False),
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Column('packages', String(511)),
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Column('active', Boolean(), nullable=False),
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UniqueConstraint('datastore_id', 'name', name='ds_versions')
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)
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def upgrade(migrate_engine):
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meta.bind = migrate_engine
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create_tables([datastores, datastore_versions])
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instances = Table('instances', meta, autoload=True)
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datastore_version_id = Column('datastore_version_id', String(36),
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ForeignKey('datastore_versions.id'))
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instances.create_column(datastore_version_id)
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instances.drop_column('service_type')
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# Table 'service_images' is deprecated since this version.
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# Leave it for few releases.
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# drop_tables([service_images])
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def downgrade(migrate_engine):
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meta.bind = migrate_engine
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instances = Table('instances', meta, autoload=True)
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constraint_names = db_utils.get_foreign_key_constraint_names(
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engine=migrate_engine,
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table='instances',
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columns=['datastore_version_id'],
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ref_table='datastore_versions',
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ref_columns=['id'])
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db_utils.drop_foreign_key_constraints(
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constraint_names=constraint_names,
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columns=[instances.c.datastore_version_id],
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ref_columns=[datastore_versions.c.id])
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instances.drop_column('datastore_version_id')
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service_type = Column('service_type', String(36))
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instances.create_column(service_type)
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instances.update().values({'service_type': 'mysql'}).execute()
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drop_tables([datastore_versions, datastores])
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