架构错误 - 引用错误:未定义电话

我在使用 node.js 和 express 构建 CRUD API 时遇到了一个小问题。

当我发布到我的 API 时，我收到"引用错误：未定义电话"

// server.js

基本设置//=============================================================================

调用我们需要的包

var express    = require('express');        // call express
var app        = express();                 // define our app using express
var bodyParser = require('body-parser');
var phone = require('./models/phone');

var mongoose = require('mongoose');


 mongoose.connect('mongodb://<userID>:<pass>@apollo.modulusmongo.net:27017/ugygY5qe');

// configure app to use bodyParser()
// this will let us get the data from a POST
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
var port = process.env.PORT || 8080;        // set our port
// ROUTES FOR OUR API
// =============================================================================
var router = express.Router();              // get an instance of the express Router
router.use(function(req,res,next){
  console.log('Something is happening');
  next();
});

router.route('/phones').post(function(req, res){
  var phone = new Phone();
  phone.name = req.body.name;
  phone.save(function(err){
    if(err){
      res.send(err);
    }
    res.json({message: 'Phone Create'});
  });
});
// test route to make sure everything is working (accessed at GET http://localhost:8080/api)
router.get('/', function(req, res) {
    res.json({ message: 'hooray! welcome to our api!' });
});
// more routes for our API will happen here
// REGISTER OUR ROUTES -------------------------------
// all of our routes will be prefixed with /api
app.use('/api', router);
// START THE SERVER
// =============================================================================
app.listen(port);
console.log('Magic happens on port ' + port);

这是我的架构文件。

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var phoneSchema = new Schema({
  name: String
});

module.exports = mongoose.model('Phone', phoneSchema);

我不确定错误在哪里。我已经查阅了猫鼬文档，四处搜索，但仍然无法正常工作。