openstack
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nova
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Merge "Fix migration 211 to downgrade with MySQL"

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Jenkins 2013-09-17 20:42:28 +00:00 committed by Gerrit Code Review
parent 472f4364f8 3cb67418aa
commit 3d0d98b816
1 changed files with 19 additions and 0 deletions
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19
nova/db/sqlalchemy/migrate_repo/versions/211_add_aggregate_metadata_uc.py
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@ -16,6 +16,7 @@
# vim: tabstop=4 shiftwidth=4 softtabstop=4
from migrate.changeset import UniqueConstraint
from migrate import ForeignKeyConstraint
from sqlalchemy import MetaData, Table
from nova.db.sqlalchemy import utils
@ -37,4 +38,22 @@ def upgrade(migrate_engine):
def downgrade(migrate_engine):
if migrate_engine.name == 'mysql':
# NOTE(jhesketh): MySQL Cannot drop index
# 'uniq_aggregate_metadata0aggregate_id0key0deleted': needed in a
# foreign key constraint. So we'll remove the fkey constraint on the
# aggregate_metadata table and add it back after the index is
# downgraded.
meta = MetaData(bind=migrate_engine)
table = Table('aggregate_metadata', meta, autoload=True)
ref_table = Table('aggregates', meta, autoload=True)
params = {'columns': [table.c['aggregate_id']],
'refcolumns': [ref_table.c['id']],
'name': 'aggregate_metadata_ibfk_1'}
fkey = ForeignKeyConstraint(**params)
fkey.drop()
utils.drop_unique_constraint(migrate_engine, TABLE_NAME, UC_NAME, *COLUMNS)
if migrate_engine.name == 'mysql':
fkey.create()