# 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


def upgrade(migrate_engine):
    # NOTE(viktors): Migration 062 removed FK from `assignment` table, but
    # MySQL silently creates indexes on FK constraints, so we should remove
    # this index manually.
    if migrate_engine.name == 'mysql':
        meta = sqlalchemy.MetaData(bind=migrate_engine)
        table = sqlalchemy.Table('assignment', meta, autoload=True)
        for index in table.indexes:
            if [c.name for c in index.columns] == ['role_id']:
                index.drop(migrate_engine)