Node + Mongoose：获取最后插入的ID

使用Node.js和Mongoose可以轻松地与MongoDB数据库进行交互。在应用程序中，有时我们可能需要获取最后插入的记录的ID。本文将介绍如何使用Node.js和Mongoose获取最后插入的ID，并提供一个案例代码来加深理解。

npm install mongoose

javascript
const mongoose = require('mongoose');

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

javascript
const userSchema = new mongoose.Schema({
  name: String
});
const User = mongoose.model('User', userSchema);

javascript
const user = new User({ name: 'John Doe' });
user.save()
  .then((result) => {
    console.log('User saved:', result);
    const lastInsertedId = result._id;
    console.log('Last inserted ID:', lastInsertedId);
  })
  .catch((error) => {
    console.error('Error saving user:', error);
  });