45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
# Copyright (c) 2014 Matthieu Huin <mhu@enovance.com>
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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
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def downgrade_trust_table_with_column_drop(meta, migrate_engine):
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trust_table = sqlalchemy.Table('trust', meta, autoload=True)
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# delete trusts with a limited use count, we are downgrading so uses
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# will not be tracked anymore.
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d = trust_table.delete(trust_table.c.remaining_uses >= 0)
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d.execute()
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trust_table.drop_column('remaining_uses')
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def upgrade_trust_table(meta, migrate_engine):
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trust_table = sqlalchemy.Table('trust', meta, autoload=True)
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trust_table.create_column(sqlalchemy.Column('remaining_uses',
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sqlalchemy.Integer(),
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nullable=True))
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def upgrade(migrate_engine):
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meta = sqlalchemy.MetaData()
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meta.bind = migrate_engine
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upgrade_trust_table(meta, migrate_engine)
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def downgrade(migrate_engine):
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meta = sqlalchemy.MetaData()
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meta.bind = migrate_engine
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downgrade_trust_table_with_column_drop(meta, migrate_engine)
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