from sqlalchemy import *
from migrate import *


def upgrade(migrate_engine):
    try:
        meta = MetaData(bind=migrate_engine)
        server = Table('server', meta, autoload=True)
        subnet = Column('subnet', Integer, nullable=False)
        subnet.create(server)
    except:
        pass


def downgrade(migrate_engine):
    try:
        meta = MetaData(bind=migrate_engine)
        server = Table('server', meta, autoload=True)
        server.c.subnet.drop()
    except:
        pass