46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
# Copyright 2013 OpenStack Foundation
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#
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# 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 as sql
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from sqlalchemy.orm import sessionmaker
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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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user_table = sql.Table('user', meta, autoload=True)
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user_table.c.name.alter(type=sql.String(255))
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def downgrade(migrate_engine):
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meta = sql.MetaData()
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meta.bind = migrate_engine
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user_table = sql.Table('user', meta, autoload=True)
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if migrate_engine.name != 'mysql':
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# NOTE(aloga): sqlite does not enforce length on the
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# VARCHAR types: http://www.sqlite.org/faq.html#q9
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# postgresql and DB2 do not truncate.
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maker = sessionmaker(bind=migrate_engine)
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session = maker()
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for user in session.query(user_table).all():
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values = {'name': user.name[:64]}
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update = (user_table.update().
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where(user_table.c.id == user.id).
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values(values))
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migrate_engine.execute(update)
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session.commit()
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session.close()
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user_table.c.name.alter(type=sql.String(64))
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