# Copyright 2012 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.
 
import sqlalchemy as sql
 
 
def upgrade(migrate_engine):
    # Upgrade operations go here. Don't create your own engine; bind
    # migrate_engine to your metadata
    meta = sql.MetaData()
    meta.bind = migrate_engine
 
    # catalog
 
    service_table = sql.Table(
        'example',
        meta,
        sql.Column('id', sql.String(64), primary_key=True),
        sql.Column('type', sql.String(255)),
        sql.Column('extra', sql.Text()))
    service_table.create(migrate_engine, checkfirst=True)
 
 
def downgrade(migrate_engine):
    # Operations to reverse the above upgrade go here.
    meta = sql.MetaData()
    meta.bind = migrate_engine
 
    tables = ['example']
    for t in tables:
        table = sql.Table(t, meta, autoload=True)
        table.drop(migrate_engine, checkfirst=True)