动态命名 mongo 关键字段 [英] dynamically name mongo key field

问题描述

我想根据变量动态命名一个 mongo 键.例如，

I want to name a mongo key dynamically based on a variable. For instance,

MyCollection.update({_id: id}, 
{ 
  $set: 
   {
     getsNamedDynamically: { 
        //stuff
     }...

我想在一个变量中设置 getsNamedDynamically 的值，以便根据其他一些因素为该字段分配一个不同的键名.我试过这样做，但是，mongo 从字面上获取值(即作为字符串)并且不会费心在程序中查找变量的值.

I would like to set the value of getsNamedDynamically in a variable to assign a different key name to the field based on some other factors. I've tried doing this, however, mongo takes the value literally (i.e. as a string) and does not bother to find the variable's value in the program.

推荐答案

您是否尝试过这种方法?(不知道是否有效)

Did you tried this aproach?(dont know if it works)

var dataToSet={};
dataToSet['field']= "some computed value";

然后

MyCollection.update({_id: id}, 
{ 
  $set: dataToSet
}

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