如何使用mongoose保存嵌套的对象数组数据？

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const nestedObjectSchema = new Schema({
  key1: String,
  key2: Number,
  // 其他字段...
});

const parentSchema = new Schema({
  nestedObjects: [nestedObjectSchema],
  // 其他字段...
});

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

const parent = new ParentModel({
  nestedObjects: [
    { key1: 'value1', key2: 1 },
    { key1: 'value2', key2: 2 },
    // 其他对象...
  ],
  // 其他字段...
});

parent.save((err, savedParent) => {
  if (err) {
    console.error(err);
  } else {
    console.log(savedParent);
  }
});

ParentModel.findOne({}, (err, parent) => {
  if (err) {
    console.error(err);
  } else {
    console.log(parent);
  }
});