Creating a Mongoose schema with a predefined key variable

I am currently utilizing expressjs, mongodb, and mongoose. My goal is to update the counts object within the given schema:

var UsersSchema = new Schema({
  username: { type: String, required: true },
  counts: {
    followers: { type: Number, default: 0 },
    trips: { type: Number, default: 0 },
    videos: { type: Number, default: 0 }
  }
})

The issue lies in the update part of the code (not functioning as expected):

var key = 'trips' // set dynamically, could be 'videos' or 'followers'
Users.update({'username': username}, {$set: {'counts.key': 12}}, callback)

A working example that is not dynamic:

Users.update({'username': username}, {$set: {'counts.trips': 12}}, callback)

Any suggestions on how to solve this?

javascriptjsonmongodbexpressmongoose

Answer №1

If you want to set dynamic variables in a query, you can do so by creating a variable for $set and using it accordingly. 

let key = 'sales';
let dynamicSet = {$set: {}};
dynamicSet.$set["data." + key] = 25;
Customers.update({'name': customerName}, dynamicSet, callback)

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