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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 OpenStack LLC.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from migrate import ForeignKeyConstraint
from sqlalchemy import MetaData, Table
from nova.openstack.common import log as logging
LOG = logging.getLogger(__name__)
def upgrade(migrate_engine):
meta = MetaData()
meta.bind = migrate_engine
dns_domains = Table('dns_domains', meta, autoload=True)
projects = Table('projects', meta, autoload=True)
fkeys = list(dns_domains.c.project_id.foreign_keys)
if fkeys:
try:
fkey_name = fkeys[0].constraint.name
ForeignKeyConstraint(
columns=[dns_domains.c.project_id],
refcolumns=[projects.c.id],
name=fkey_name).drop()
except Exception:
LOG.error(_("foreign key constraint couldn't be removed"))
raise
def downgrade(migrate_engine):
meta = MetaData()
meta.bind = migrate_engine
dns_domains = Table('dns_domains', meta, autoload=True)
projects = Table('projects', meta, autoload=True)
kwargs = {
'columns': [dns_domains.c.project_id],
'refcolumns': [projects.c.id],
}
if migrate_engine.name == 'mysql':
# For MySQL we name our fkeys explicitly so they match Essex
kwargs['name'] = 'dns_domains_ibfk_1'
ForeignKeyConstraint(**kwargs).create()
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