如何使用可变猫鼬查询? [英] How to use variable mongoose query?

问题描述

数据架构

ID: String,    
Item: {
       Possess: {
          Jewel: [Number]
     }

代码

var temp = 1
db.collection.update({"ID":"sample"},{"$set":{"Item.Possess.Jewel.1":888})

如何在"Item.Possess.Jewel.1"中使用变量temp?

How to use variable temp in "Item.Possess.Jewel.1" ?

"Item.Possess.Jewel.temp"不起作用

"Item.Possess.Jewel.temp" doesn't work

推荐答案

您必须以编程方式构建$set对象:

You have to build up your $set object programmatically:

var temp = 1;
var set = {$set: {}};
set.$set["Item.Possess.Jewel." + temp] = 888;
db.collection.update({"ID":"sample"}, set);

这篇关于如何使用可变猫鼬查询?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！