Source code for keystone.common.sql.migrate_repo.versions.088_domain_specific_roles

# 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
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# Unless required by applicable law or agreed to in writing, software
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import migrate
import sqlalchemy as sql

_ROLE_NAME_NEW_CONSTRAINT = 'ixu_role_name_domain_id'
_DOMAIN_ID_COLUMN_NAME = 'domain_id'
_NULL_DOMAIN_ID = '<<null>>'

[docs]def upgrade(migrate_engine): meta = sql.MetaData() meta.bind = migrate_engine role_table = sql.Table(_ROLE_TABLE_NAME, meta, autoload=True) domain_id = sql.Column(_DOMAIN_ID_COLUMN_NAME, sql.String(64), nullable=False, server_default=_NULL_DOMAIN_ID) # NOTE(morganfainberg): the `role_name` unique constraint is not # guaranteed to be a fixed name, such as 'ixu_role_name`, so we need to # search for the correct constraint that only affects # and drop that 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(, # perform changes after constraint is dropped. if 'domain_id' not in role_table.columns: # Only create the column if it doesn't already exist. role_table.create_column(domain_id) migrate.UniqueConstraint(, role_table.c.domain_id, name=_ROLE_NAME_NEW_CONSTRAINT).create()