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# This file is part of Buildbot. Buildbot is free software: you can
# redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, version 2.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright Buildbot Team Members
import sqlalchemy as sa
def upgrade(migrate_engine):
metadata = sa.MetaData()
metadata.bind = migrate_engine
# older build masters stored some of their state with an object named
# 'master' with class 'buildbot.master.BuildMaster', while other state was
# stored with objects named after each master itself, with class
# BuildMaster.
objects_table = sa.Table('objects', metadata, autoload=True)
object_state_table = sa.Table('object_state', metadata, autoload=True)
# get the old, unwanted ID
q = sa.select([ objects_table.c.id ],
whereclause=(objects_table.c.name=='master')
& (objects_table.c.class_name == 'buildbot.master.BuildMaster'))
res = q.execute()
old_id = res.scalar()
# if there's no such ID, there's nothing to change
if old_id is not None:
# get the new ID
q = sa.select([ objects_table.c.id ],
whereclause=objects_table.c.class_name == 'BuildMaster')
res = q.execute()
ids = res.fetchall()
# if there is exactly one ID, update the existing object_states. If
# there are zero or multiple object_states, then we do not know which
# master to assign last_processed_change to, so we just delete it.
# This indicates to the master that it has processed all changes, which
# is probably accurate.
if len(ids) == 1:
new_id = ids[0][0]
# update rows with the old id to use the new id
q = object_state_table.update(
whereclause=(object_state_table.c.objectid == old_id))
q.execute(objectid=new_id)
else:
q = object_state_table.delete(
whereclause=(object_state_table.c.objectid == old_id))
q.execute()
# in either case, delete the old object row
q = objects_table.delete(
whereclause=(objects_table.c.id == old_id))
q.execute()
# and update the class name for the new rows
q = objects_table.update(
whereclause=(objects_table.c.class_name == 'BuildMaster'))
q.execute(class_name='buildbot.master.BuildMaster')
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