Mongoose在对象数组中过期

const mongoose = require('mongoose');

// 定义Schema
const userSchema = new mongoose.Schema({
  name: String,
  messages: [{
    content: String,
    createdAt: { type: Date, expires: '1d' } // 设置过期时间为1天
  }]
});

// 创建Model
const User = mongoose.model('User', userSchema);

// 创建用户并添加消息
const user = new User({
  name: 'John',
  messages: [
    { content: 'Hello', createdAt: new Date() },
    { content: 'How are you?', createdAt: new Date() }
  ]
});

// 保存用户到数据库
user.save()
  .then(() => {
    console.log('用户保存成功');
  })
  .catch((error) => {
    console.error('保存用户时出错：', error);
  });

userSchema.index({ 'messages.createdAt': 1 }, { expireAfterSeconds: 0 });