Make dynamic query with Mongoose

Question

I am trying to make a dynamic condition using Mongoose but it doesn\'t work as I imagined.

the code is like this

id = req.params.questionId;
index =          


        

Answer 1

You need to create your updates object in two steps:

var updates = { $push: {} };
updates.$push["array.$.array2." + index + ".answeredBy"] = userId;

Update

Now that node.js 4+ supports computed property names, you can do this in one step:

var updates = { $push: {
    ["array.$.array2." + index + ".answeredBy"]: userId
} };