**** CubicPower OpenStack Study ****
def upgrade(migrate_engine):
meta = sql.MetaData()
meta.bind = migrate_engine
endpoint_table = sql.Table('endpoint', meta, autoload=True)
session = orm.sessionmaker(bind=migrate_engine)()
for endpoint in session.query(endpoint_table).all():
try:
extra = json.loads(endpoint.extra)
legacy_endpoint_id = extra.pop('legacy_endpoint_id')
except KeyError:
# if there is no legacy_endpoint_id, there's nothing to do
pass
else:
q = endpoint_table.update()
q = q.where(endpoint_table.c.id == endpoint.id)
q = q.values({
endpoint_table.c.extra: json.dumps(extra),
endpoint_table.c.legacy_endpoint_id: legacy_endpoint_id})
migrate_engine.execute(q)
session.close()
**** CubicPower OpenStack Study ****
def downgrade(migrate_engine):
meta = sql.MetaData()
meta.bind = migrate_engine
endpoint_table = sql.Table('endpoint', meta, autoload=True)
session = orm.sessionmaker(bind=migrate_engine)()
for endpoint in session.query(endpoint_table).all():
if endpoint.legacy_endpoint_id is not None:
extra = json.loads(endpoint.extra)
extra['legacy_endpoint_id'] = endpoint.legacy_endpoint_id
q = endpoint_table.update()
q = q.where(endpoint_table.c.id == endpoint.id)
q = q.values({
endpoint_table.c.extra: json.dumps(extra),
endpoint_table.c.legacy_endpoint_id: None})
migrate_engine.execute(q)
session.close()