blazar/climate/db/migration/alembic_migrations/versions/1fd6c2eded89_add_trust_id_t...

62 lines
2.0 KiB
Python

# Copyright 2014 OpenStack Foundation.
#
# 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.
"""Add trust_id to ComputeHost
Revision ID: 1fd6c2eded89
Revises: 0_1
Create Date: 2014-03-28 01:12:02.735519
"""
# revision identifiers, used by Alembic.
revision = '1fd6c2eded89'
down_revision = '23d6240b51b2'
from alembic import op
import sqlalchemy as sa
def upgrade():
op.add_column('computehosts',
sa.Column('trust_id',
sa.String(length=36),
nullable=True))
if op.get_bind().engine.name != 'sqlite':
#I need to do it in this way because Postgress fails
#if I use SQLAlchemy
connection = op.get_bind()
connection.execute("UPDATE computehosts SET trust_id = ''")
op.alter_column('computehosts', 'trust_id',
existing_type=sa.String(length=36), nullable=False)
def downgrade():
engine = op.get_bind().engine
if engine.name == 'sqlite':
# Only for testing purposes with sqlite
op.execute('CREATE TABLE tmp_computehosts as SELECT id, '
'vcpus, cpu_info, hypervisor_type, '
'hypervisor_version, hypervisor_hostname, service_name, '
'memory_mb, local_gb, status '
'FROM computehosts')
op.execute('DROP TABLE computehosts')
op.execute('ALTER TABLE tmp_computehosts RENAME TO computehosts')
return
op.drop_column('computehosts', 'trust_id')