如何在Node.js中使用Mongoose分页？

npm install mongoose express

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true });

const userSchema = new mongoose.Schema({
  name: String,
  email: String
});

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

const express = require('express');
const app = express();

app.get('/users', async (req, res) => {
  const page = parseInt(req.query.page) || 1;
  const limit = parseInt(req.query.limit) || 10;

  try {
    const users = await User.find()
      .skip((page - 1) * limit)
      .limit(limit);

    const count = await User.countDocuments();
    const totalPages = Math.ceil(count / limit);

    res.json({
      page,
      totalPages,
      users
    });
  } catch (err) {
    res.status(500).json({ message: err.message });
  }
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

const page = parseInt(req.query.page) || 1;
const limit = parseInt(req.query.limit) || 10;

if (isNaN(page) || isNaN(limit)) {
  return res.status(400).json({ message: 'Invalid page or limit parameter' });
}