相关疑难解决方法(0)

考虑这段代码,我需要创建或更新特定文档.

Inbox.model.findOneAndUpdate({ number: req.phone.number }, {
    number: req.phone.number,
    country: req.phone.country,
    token: hat(),
    appInstalled: true
}, { new: true, upsert: true }).then(function(inbox){
    /*
       do something here with inbox, but only if the inbox was created (not updated)
    */
});

mongoose是否有能力区分是否创建或更新了文档？我需要new: true因为我需要调用函数inbox.