无法弄清楚出了什么问题。如何调试

Question

module.js:471
    throw err;
    ^

Error: Cannot find module '..models/article'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (C:\Users\Sankalp Singhai\blogapp\server\routes\api.js
:4:17)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (C:\Users\Sankalp Singhai\blogapp\server.js:7:13)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)

在哪里寻找模块文件夹？是数据库连接错误。在 mlab 上创建数据库。

Answer 1

    const express = require('express');
    const bodyParser = require('body-parser');
    const path = require('path');
    const http = require('http');
    const app = express();

    const api = require('./server/routes/api');
    //parsers
    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({extended : false}));

    app.use(express.static(path.join(__dirname,'dist')));

    app.use('/api' , api)

    app.get('*', (req,res)=>{
        res.sendFile(path.join(__dirname, 'dist/index.html'));
    });

    //set port
    const port = process.env.PORT || '3000';
    app.set('port' , port);

    const server = http.createServer(app);

    server.listen(port, () => console.log('Running on localhost: ${port}'));

**server.js** 

Answer 2

C:\Users\Sankalp Singhai\blogapp>node server.js
(node:4068) DeprecationWarning: `open()` is deprecated in mongoose >= 4.11.0, us
e `openUri()` instead, or set the `useMongoClient` option if using `connect()` o
r `createConnection()`. See http://mongoosejs.com/docs/connections.html#use-mong
o-client
Running on localhost: ${port}
Error connecting
(node:4068) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejec
tion id: 1): MongoError: failed to connect to server [6:27017] on first connect
[MongoError: getaddrinfo ENOTFOUND 6 6:27017] 

连接错误