# Copyright 2015 Intel Corporation
# 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 UniqueConstraint
from sqlalchemy import MetaData, Table


def upgrade(migrate_engine):
    meta = MetaData(bind=migrate_engine)
    trusts = Table('trust', meta, autoload=True)

    UniqueConstraint('trustor_user_id', 'trustee_user_id', 'project_id',
                     'impersonation', 'expires_at', table=trusts,
                     name='duplicate_trust_constraint').create()