基于数据库字段的差异化登录响应: Express + Node + MongoDB

$ npm install express-generator -g
$ express myapp
$ cd myapp
$ npm install

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

const userSchema = new mongoose.Schema({
  username: String,
  password: String,
  role: String
});

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

app.post('/login', (req, res) => {
  const { username, password } = req.body;

  User.findOne({ username, password }, (err, user) => {
    if (err) {
      res.status(500).send('Internal Server Error');
    } else if (!user) {
      res.status(401).send('Unauthorized');
    } else {
      if (user.role === 'admin') {
        res.send('Welcome, admin!');
      } else {
        res.send('Welcome, user!');
      }
    }
  });
});

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