111 lines
4.1 KiB
Python
111 lines
4.1 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 Column, MetaData, String, Table, Text, types
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from sqlalchemy.orm import sessionmaker
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#sqlite doesn't support dropping columns. Copy to a new table instead
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def downgrade_user_table_with_copy(meta, migrate_engine):
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maker = sessionmaker(bind=migrate_engine)
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session = maker()
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session.execute("ALTER TABLE user RENAME TO orig_user;")
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user_table = Table(
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'user',
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meta,
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Column('id', String(64), primary_key=True),
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Column('name', String(64), unique=True, nullable=False),
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Column('extra', Text()))
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user_table.create(migrate_engine, checkfirst=True)
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orig_user_table = Table('orig_user', meta, autoload=True)
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for user in session.query(orig_user_table):
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session.execute("insert into user (id, name, extra) "
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"values ( :id, :name, :extra);",
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{'id': user.id,
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'name': user.name,
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'extra': user.extra})
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session.execute("drop table orig_user;")
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session.close()
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def downgrade_tenant_table_with_copy(meta, migrate_engine):
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maker = sessionmaker(bind=migrate_engine)
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session = maker()
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session.execute("ALTER TABLE tenant RENAME TO orig_tenant;")
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tenant_table = Table(
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'tenant',
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meta,
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Column('id', String(64), primary_key=True),
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Column('name', String(64), unique=True, nullable=False),
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Column('extra', Text()))
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tenant_table.create(migrate_engine, checkfirst=True)
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orig_tenant_table = Table('orig_tenant', meta, autoload=True)
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for tenant in session.query(orig_tenant_table):
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session.execute("insert into tenant (id, name, extra) "
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"values ( :id, :name, :extra);",
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{'id': tenant.id,
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'name': tenant.name,
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'extra': tenant.extra})
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session.execute("drop table orig_tenant;")
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session.close()
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def downgrade_user_table_with_column_drop(meta, migrate_engine):
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user_table = Table('user', meta, autoload=True)
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user_table.drop_column(Column('password', String(128)))
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user_table.drop_column(Column('enabled', types.Boolean,
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default=True))
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def downgrade_tenant_table_with_column_drop(meta, migrate_engine):
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tenant_table = Table('tenant', meta, autoload=True)
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tenant_table.drop_column(Column('description', Text()))
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tenant_table.drop_column(Column('enabled', types.Boolean))
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def upgrade_user_table(meta, migrate_engine):
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user_table = Table('user', meta, autoload=True)
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user_table.create_column(Column('password', String(128)))
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user_table.create_column(Column('enabled', types.Boolean,
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default=True))
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def upgrade_tenant_table(meta, migrate_engine):
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tenant_table = Table('tenant', meta, autoload=True)
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tenant_table.create_column(Column('description', Text()))
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tenant_table.create_column(Column('enabled', types.Boolean))
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def upgrade(migrate_engine):
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meta = MetaData()
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meta.bind = migrate_engine
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upgrade_user_table(meta, migrate_engine)
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upgrade_tenant_table(meta, migrate_engine)
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def downgrade(migrate_engine):
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meta = MetaData()
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meta.bind = migrate_engine
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if migrate_engine.name == 'sqlite':
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downgrade_user_table_with_copy(meta, migrate_engine)
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downgrade_tenant_table_with_copy(meta, migrate_engine)
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else:
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downgrade_user_table_with_column_drop(meta, migrate_engine)
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downgrade_tenant_table_with_column_drop(meta, migrate_engine)
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