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Mongoose 的exec(cb)具体什么意思啊？
闭关修行中......
cb是callback的意思,exec(cb)即执行完后将调用callback函数,你可以传一个函数进去,例如:
cb
callback
exec(cb)
db.collection.find("xxx").exec(function(err,doc){ console.log(doc); });
执行查询，并将查询结果传入回调函数cb
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
cb是callback的意思,exec(cb)即执行完后将调用callback函数,你可以传一个函数进去,例如:执行查询，并将查询结果传入回调函数
cb