api.py 文件源码

def network_get_all_by_host(context, host):
    fixed_host_filter = or_(models.FixedIp.host == host,
            and_(models.FixedIp.instance_uuid != null(),
                 models.Instance.host == host))
    fixed_ip_query = model_query(context, models.FixedIp,
                                 (models.FixedIp.network_id,)).\
                     outerjoin((models.Instance,
                                models.Instance.uuid ==
                                models.FixedIp.instance_uuid)).\
                     filter(fixed_host_filter)
    # NOTE(vish): return networks that have host set
    #             or that have a fixed ip with host set
    #             or that have an instance with host set
    host_filter = or_(models.Network.host == host,
                      models.Network.id.in_(fixed_ip_query.subquery()))
    return _network_get_query(context).filter(host_filter).all()