#   Copyright 2012 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.

from sqlalchemy import Column, MetaData, String, Table


def upgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine
    compute_nodes = Table("compute_nodes", meta, autoload=True)
    hypervisor_hostname = Column("hypervisor_hostname", String(255))
    compute_nodes.create_column(hypervisor_hostname)


def downgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine
    compute_nodes = Table("compute_nodes", meta, autoload=True)
    compute_nodes.drop_column('hypervisor_hostname')
