如何更好地构建具有关系的mongoose模式

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: String,
  email: String,
  posts: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Post' }]
});

const postSchema = new mongoose.Schema({
  title: String,
  content: String,
  author: { type: mongoose.Schema.Types.ObjectId, ref: 'User' }
});

const User = mongoose.model('User', userSchema);
const Post = mongoose.model('Post', postSchema);

// 创建一个用户
const user = new User({
  name: 'John Doe',
  email: 'john@example.com'
});

user.save()
  .then(() => {
    // 创建一篇文章
    const post = new Post({
      title: 'Hello World',
      content: 'This is my first post',
      author: user._id
    });

    return post.save();
  })
  .then(() => {
    // 查找文章并将作者信息填充到author字段中
    return Post.findOne({ title: 'Hello World' }).populate('author');
  })
  .then((post) => {
    console.log(post);
  })
  .catch((error) => {
    console.error(error);
  });

Post.findOne({ title: 'Hello World' }).populate('author')
  .then((post) => {
    console.log(post.author);
  })
  .catch((error) => {
    console.error(error);
  });