如何在mongoose中查询ObjectIds数组？

const mongoose = require('mongoose');

// 定义模型
const User = mongoose.model('User', {
  name: String,
  friends: [{ type: mongoose.Schema.Types.ObjectId, ref: 'User' }]
});

// 查询ObjectIds数组
User.find({ friends: { $in: [ObjectId("60a7e8e8c8e8e8e8e8e8e8e8"), ObjectId("60a7e8e8c8e8e8e8e8e8e8e9")] } })
  .populate('friends')
  .exec((err, users) => {
    if (err) {
      console.error(err);
    } else {
      console.log(users);
    }
  });