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