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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2013 OpenStack LLC
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import sqlalchemy as sql
def upgrade(migrate_engine):
# The group_project_metadata table was not updated in terms of its
# FK to the tenant table when the tenant->project change was made at
# the 015 migration for sqlite. This upgrade fixes that.
# We need to create a fake tenant table so that we can first load
# the group_project_metadata at all, then do a dance of copying tables
# to get us to the correct schema.
meta = sql.MetaData()
meta.bind = migrate_engine
if migrate_engine.name != 'sqlite':
return
temp_tenant_table = sql.Table(
'tenant',
meta,
sql.Column('id', sql.String(64), primary_key=True))
temp_tenant_table.create(migrate_engine, checkfirst=True)
sql.Table('user', meta, autoload=True)
old_group_metadata_table = sql.Table('group_project_metadata',
meta, autoload=True)
# OK, we now have the table loaded, create a first
# temporary table of a different name with the correct FK
sql.Table('project', meta, autoload=True)
temp_group_project_metadata_table = sql.Table(
'temp_group_project_metadata',
meta,
sql.Column(
'group_id',
sql.String(64),
primary_key=True),
sql.Column(
'project_id',
sql.String(64),
sql.ForeignKey('project.id'),
primary_key=True),
sql.Column('data', sql.Text()))
temp_group_project_metadata_table.create(migrate_engine, checkfirst=True)
# Populate the new temporary table, and then drop the old one
session = sql.orm.sessionmaker(bind=migrate_engine)()
for metadata in session.query(old_group_metadata_table):
q = temp_group_project_metadata_table.insert().values(
group_id=metadata.group_id,
project_id=metadata.project_id,
data=metadata.data)
session.execute(q)
session.commit()
old_group_metadata_table.drop()
temp_tenant_table.drop()
# Now do a final table copy to get the table of the right name.
# Re-init the metadata so that sqlalchemy does not get confused with
# multiple versions of the same named table.
meta2 = sql.MetaData()
meta2.bind = migrate_engine
sql.Table('project', meta2, autoload=True)
new_group_project_metadata_table = sql.Table(
'group_project_metadata',
meta2,
sql.Column(
'group_id',
sql.String(64),
primary_key=True),
sql.Column(
'project_id',
sql.String(64),
sql.ForeignKey('project.id'),
primary_key=True),
sql.Column('data', sql.Text()))
new_group_project_metadata_table.create(migrate_engine, checkfirst=True)
for metadata in session.query(temp_group_project_metadata_table):
q = new_group_project_metadata_table.insert().values(
group_id=metadata.group_id,
project_id=metadata.project_id,
data=metadata.data)
session.execute(q)
session.commit()
temp_group_project_metadata_table.drop()
def downgrade(migrate_engine):
# Put the group_project_metadata table back the way it was in its rather
# broken state. We don't try and re-write history, since otherwise people
# get out of step.
meta = sql.MetaData()
meta.bind = migrate_engine
if migrate_engine.name != 'sqlite':
return
sql.Table('user', meta, autoload=True)
sql.Table('project', meta, autoload=True)
group_metadata_table = sql.Table('group_project_metadata',
meta, autoload=True)
# We want to create a temp group meta table with the FK
# set to the wrong place.
temp_tenant_table = sql.Table(
'tenant',
meta,
sql.Column('id', sql.String(64), primary_key=True))
temp_tenant_table.create(migrate_engine, checkfirst=True)
temp_group_project_metadata_table = sql.Table(
'temp_group_project_metadata',
meta,
sql.Column(
'group_id',
sql.String(64),
primary_key=True),
sql.Column(
'project_id',
sql.String(64),
sql.ForeignKey('tenant.id'),
primary_key=True),
sql.Column('data', sql.Text()))
temp_group_project_metadata_table.create(migrate_engine, checkfirst=True)
# Now populate the temp table and drop the real one
session = sql.orm.sessionmaker(bind=migrate_engine)()
for metadata in session.query(group_metadata_table):
q = temp_group_project_metadata_table.insert().values(
group_id=metadata.group_id,
project_id=metadata.project_id,
data=metadata.data)
session.execute(q)
session.commit()
group_metadata_table.drop()
# Now copy again into the correctly named table. Re-init the metadata
# so that sqlalchemy does not get confused with multiple versions of the
# same named table.
meta2 = sql.MetaData()
meta2.bind = migrate_engine
sql.Table('tenant', meta2, autoload=True)
new_group_project_metadata_table = sql.Table(
'group_project_metadata',
meta2,
sql.Column(
'group_id',
sql.String(64),
primary_key=True),
sql.Column(
'project_id',
sql.String(64),
sql.ForeignKey('tenant.id'),
primary_key=True),
sql.Column('data', sql.Text()))
new_group_project_metadata_table.create(migrate_engine, checkfirst=True)
for metadata in session.query(temp_group_project_metadata_table):
q = new_group_project_metadata_table.insert().values(
group_id=metadata.group_id,
project_id=metadata.project_id,
data=metadata.data)
session.execute(q)
session.commit()
temp_group_project_metadata_table.drop()
temp_tenant_table.drop()
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