How to use variables in MongoDB query?

问题

Is it possible to use a variables in MongoDB's query like this?

var FOO="123";
var BOO="323";
user.findOneAndUpdate({_id: userID},{$set:{FOO:BOO}}

BOO - the value, is working fine and it's being assign, while FOO - the key is not.

回答1:

In MongoDB as such no functionality but you can do this in javascript like this

    var FOO="123";
    var BOO="323";
    user.findOneAndUpdate({_id: userID},{$set:{[FOO]:BOO}}

来源：https://stackoverflow.com/questions/48136206/how-to-use-variables-in-mongodb-query