如何使用MongoDB/Node.js/Mongoose为客户端数据库生成随机ID？

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  _id: {
    type: String,
    default: mongoose.Types.ObjectId().toString() // 生成随机ID
  },
  name: String,
  email: String,
  // 其他字段...
});

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

const newUser = new User({
  name: 'John',
  email: 'john@example.com',
  // 其他字段...
});

newUser.save((err, savedUser) => {
  if (err) {
    console.error(err);
  } else {
    console.log('User created with ID:', savedUser._id);
  }
});