Source code for keystone.common.sql.migrate_repo.versions.023_drop_credential_constraints

# Copyright 2013 OpenStack Foundation
#
# 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.

import sqlalchemy

from keystone.common.sql import migration_helpers


[docs]def list_constraints(migrate_engine): meta = sqlalchemy.MetaData() meta.bind = migrate_engine user_table = sqlalchemy.Table('user', meta, autoload=True) proj_table = sqlalchemy.Table('project', meta, autoload=True) cred_table = sqlalchemy.Table('credential', meta, autoload=True) constraints = [{'table': cred_table, 'fk_column': 'user_id', 'ref_column': user_table.c.id}, {'table': cred_table, 'fk_column': 'project_id', 'ref_column': proj_table.c.id}] return constraints
[docs]def upgrade(migrate_engine): # SQLite does not support constraints, and querying the constraints # raises an exception if migrate_engine.name == 'sqlite': return migration_helpers.remove_constraints(list_constraints(migrate_engine))
[docs]def downgrade(migrate_engine): if migrate_engine.name == 'sqlite': return migration_helpers.add_constraints(list_constraints(migrate_engine))