Source code for keystone.common.sql.migrate_repo.versions.096_drop_role_name_constraint

# 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
# 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 migrate
import sqlalchemy as sql


[docs]def upgrade(migrate_engine): meta = sql.MetaData() meta.bind = migrate_engine role_table = sql.Table(_ROLE_TABLE_NAME, meta, autoload=True) # NOTE(morganfainberg): the `role_name` unique constraint is not # guaranteed to be named 'ixu_role_name', so we need to search for the # correct constraint that only affects and drop # that constraint. # # This is an idempotent change that reflects the fix to migration # 88 if the role_name unique constraint was not named consistently and # someone manually fixed the migrations / db without dropping the # old constraint. to_drop = None if == 'mysql': for c in role_table.indexes: if (c.unique and len(c.columns) == 1 and _ROLE_NAME_COLUMN_NAME in c.columns): to_drop = c break else: for c in role_table.constraints: if len(c.columns) == 1 and _ROLE_NAME_COLUMN_NAME in c.columns: to_drop = c break if to_drop is not None: migrate.UniqueConstraint(,