40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import sqlalchemy
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from keystone.common.sql import migration_helpers
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def list_constraints(migrate_engine):
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meta = sqlalchemy.MetaData()
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meta.bind = migrate_engine
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user_table = sqlalchemy.Table('user', meta, autoload=True)
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group_table = sqlalchemy.Table('group', meta, autoload=True)
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domain_table = sqlalchemy.Table('domain', meta, autoload=True)
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constraints = [{'table': user_table,
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'fk_column': 'domain_id',
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'ref_column': domain_table.c.id},
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{'table': group_table,
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'fk_column': 'domain_id',
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'ref_column': domain_table.c.id}]
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return constraints
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def upgrade(migrate_engine):
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# SQLite does not support constraints, and querying the constraints
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# raises an exception
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if migrate_engine.name == 'sqlite':
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return
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migration_helpers.remove_constraints(list_constraints(migrate_engine))
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