Mongoose find() not working on foreign object

Question

Here's my schema.

const Sample = new Schema({
  name: { type: String },
  people: { type: Schema.Types.ObjectId, ref: 'People' }
})

const People = new Schema({
  name: { type: String }
})

Now when I am trying to query the name of People schema using Sample schema.

var queryString = 'name of people'
const results = await Sample.find().populate('people').find({
  'people.name': { $regex: queryString, $options: 'i' },
})

It's working if I am just querying the name of Sample schema but when I'm trying to query the name of People schema on Sample model there are no results.

Answer 1

Mongoose populate supports applying query conditions:

const results = await Sample.find()
    .populate({path: 'people', name: {'APPLY YOUR QUERY CONDITIONS HERE'}});

Check the official documentation:

https://mongoosejs.com/docs/populate.html#query-conditions