Increment nested mongoose shcema

Question

This is my model:

const telemetery = mongoose.Schema({
link: String,
originalLink: String,
creator: {
    type: mongoose.Schema.Types.ObjectId
},
browerType: {
    Firefox: Number,
    Chrome: Number,
    Edge: Number,
    IE: Number,
    Safari: Number,
    Other: Number
}

I want to increment the value of the firefox by 1

What I am doing now:

const test = await Telemetery.findOneAndUpdate({link: req.params.link}, {browserType: {$inc : {Firefox : 1}}})

But this still id not updating the document. At the end I would also like to use a variable instead of Firefox so that the value is incremented dynamically with depending on the input.

Can anyone please help?

Answer 1

To increment the value in a nested object you can use the dot notation

const test = await Telemetery.findOneAndUpdate(
  { link: req.params.link },
  { $inc: { 'browserType.Firefox': 1 } }
);

Inorder to dynamically set the field name you can do something like

const browserName = 'Firefox';
const key = `browserType.${browserName}`;
const test = await Telemetery.findOneAndUpdate(
  { link: req.params.link },
  { $inc: { [key]: 1 } }
);