Mongoose:如何在子文档数组中添加附加字段

const mongoose = require('mongoose');

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

const parentSchema = new mongoose.Schema({
  children: [childSchema],
});

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

const parent = new Parent();
parent.children.push({ name: 'Child 1', additionalField: 'Value' });

parent.save((err) => {
  if (err) {
    console.error(err);
  } else {
    console.log('Parent document saved successfully.');
  }
});