I was making a backend application to schedule company visits and when I tried to use Mongoose 'populate' function, got this error:

TypeError: booking.execPopulate is not a function

I don't know what happened but this is my code:

BookingController.js

const Booking = require('../models/Booking')

module.exports = {
  async store(req, res) {
    const { user_id } = req.headers;
    const { spot_id } = req.params;
    const { date } = req.body;

    const booking = await Booking.create({
      user: user_id,
      spot: spot_id,
      date,
    });

    await booking.populate('spot');
    await booking.populate('user');
    await booking.execPopulate();

    return res.json(booking);
  }
}

BookingModel.js

const mongoose = require('mongoose');

const BookingSchema = new mongoose.Schema({
  date: String,
  approved: Boolean,
  user: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User'
  },
  spot: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Spot'
  }
});

module.exports = mongoose.model('Booking', BookingSchema);