232c38fec944_service_host_many_to_many.py 文件源码

def upgrade():
    op.create_table(
        'hosts_services',
        sa.Column('host_id', sa.String(36), sa.ForeignKey('hosts.id')),
        sa.Column('service_id', sa.String(36), sa.ForeignKey('services.id')),
        sa.UniqueConstraint('host_id', 'service_id'))

    with op.batch_alter_table('services') as batch_op:
        batch_op.drop_constraint('fk_services_host_id_hosts')
        batch_op.drop_column('host_id')