使用findByIdAndUpdate的NodeJS + Mongoose修补方法不返回任何内容，即使设置了新的:在选项中设置为true

const mongoose = require('mongoose');

// 连接MongoDB数据库
mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => console.log('Connected to MongoDB'))
  .catch(error => console.error('Failed to connect to MongoDB', error));

// 定义文档模型
const Schema = mongoose.Schema;
const mySchema = new Schema({
  name: String,
  age: Number
});
const MyModel = mongoose.model('MyModel', mySchema);

// 更新文档
const documentId = '1234567890'; // 要更新的文档ID
const updateFields = { age: 30 }; // 要更新的字段
const options = { new: true }; // 设置选项为true

MyModel.findByIdAndUpdate(documentId, updateFields, options)
  .then(updatedDocument => {
    console.log(updatedDocument);
  })
  .catch(error => {
    console.error('Failed to update document', error);
  });