status：false}没有方法'保存'Mongoose

Question

这是我要更新的代码：

 mongodb.model("Participant").find({ channel: response.channel }, function (err, doc){
                  doc.status = 1;
                  doc.save();
                  });

我收到了这个错误：

                  doc.save();
                      ^
TypeError: Object { _id: 55f365f32d051f10024d9c9d,
  event: 'ConfbridgeJoin',
  channel: 'SIP/192.168.236.15-00000213',
  uniqueid: '1442014697.1157',
  conference: '0090000218',
  calleridnum: '0090000219',
  calleridname: '0090000219',
  __v: 0,
  status: false } has no method 'save'

it errors status：false}没有方法'save'