有没有办法在mongoose中的对象数组中填充对象内的数组

const childSchema = new mongoose.Schema({
  name: String
});

const parentSchema = new mongoose.Schema({
  children: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Child' }]
});

const Child = mongoose.model('Child', childSchema);
const Parent = mongoose.model('Parent', parentSchema);

const child1 = new Child({ name: 'Child 1' });
const child2 = new Child({ name: 'Child 2' });

const parent = new Parent({ children: [child1, child2] });

child1.save();
child2.save();
parent.save();

Parent.findOne().populate('children').exec(function(err, parent) {
  console.log(parent.children); // 填充了对象数组中的子数组
});