76 lines
2.6 KiB
Python
76 lines
2.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2013 Rackspace Hosting
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# All Rights Reserved.
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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 json
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import pickle
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import sqlalchemy
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from sqlalchemy import MetaData, Table, Column # noqa
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from glance.db.sqlalchemy import models
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def upgrade(migrate_engine):
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meta = sqlalchemy.schema.MetaData(migrate_engine)
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image_locations = Table('image_locations', meta, autoload=True)
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new_meta_data = Column('storage_meta_data', models.JSONEncodedDict,
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default={})
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new_meta_data.create(image_locations)
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noe = pickle.dumps({})
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s = sqlalchemy.sql.select([image_locations]).\
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where(image_locations.c.meta_data != noe)
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conn = migrate_engine.connect()
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res = conn.execute(s)
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for row in res:
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meta_data = row['meta_data']
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x = pickle.loads(meta_data)
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if x != {}:
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stmt = image_locations.update().\
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where(image_locations.c.id == row['id']).\
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values(storage_meta_data=x)
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conn.execute(stmt)
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conn.close()
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image_locations.columns['meta_data'].drop()
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image_locations.columns['storage_meta_data'].alter(name='meta_data')
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def downgrade(migrate_engine):
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meta = sqlalchemy.schema.MetaData(migrate_engine)
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image_locations = Table('image_locations', meta, autoload=True)
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old_meta_data = Column('old_meta_data', sqlalchemy.PickleType(),
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default={})
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old_meta_data.create(image_locations)
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noj = json.dumps({})
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s = sqlalchemy.sql.select([image_locations]).\
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where(image_locations.c.meta_data != noj)
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conn = migrate_engine.connect()
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res = conn.execute(s)
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for row in res:
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x = row['meta_data']
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meta_data = json.loads(x)
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if meta_data != {}:
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stmt = image_locations.update().\
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where(image_locations.c.id == row['id']).\
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values(old_meta_data=meta_data)
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conn.execute(stmt)
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conn.close()
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image_locations.columns['meta_data'].drop()
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image_locations.columns['old_meta_data'].alter(name='meta_data')
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