node.js - MongoDB 无法连接到服务器

Question

编辑:我尝试了几个不同的端口，终止了端口上的任务并再次尝试，它不起作用。

今天我开始了有关 MERN 堆栈的教程，但我无法连接到服务器。使用 npm run server 时出现以下错误: Error Message

我安装了推荐版本的node，使用npm i安装了express、mongoose、body-parser、concurrent和nodemon。我遵循了教程的每一步，但我无法让它工作。

这些是我的文件:

服务器.js

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');


const app = express();

// Bodyparser Middleware
app.use(bodyParser.json());

// DB Config
const db = require('./config/keys').mongoURI;

// Connect to Mongo
mongoose
  .connect(db, {useNewUrlParser: true}) // Adding new mongo url parser
  .then(() => console.log('MongoDB Connected...'))
  .catch(err => console.log(err));

const port = process.env.PORT || 5000;

app.listen(port, () => console.log(`Server started on port ${port}`));

package.json

{
  "name": "mern_shopping_list",
  "version": "1.0.0",
  "description": "Shopping list built with the MERN stack",
  "main": "server.js",
  "scripts": {
    "start": "node server.js",
    "server": "nodemon server.js"
  },
  "author": "Mario Hess",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.18.3",
    "concurrently": "^4.0.1",
    "express": "^4.16.3",
    "mongoose": "^5.2.17"
  },
  "devDependencies": {
    "nodemon": "^1.18.4"
  }
}

keys.js(是的，我编辑了我的名字和密码!)

module.exports = {
    mongoURI:'mongodb://<MYNAME>:<MYPASSWORD>@ds115193.mlab.com:15193/servasdu'
}

Answer 1

试试这个:

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');

const app = express();

// Bodyparser Middleware
app.use(bodyParser.json());

// DB Config
// const db = require('./config/keys').mongoURI;
const db = 'mongodb://mario:M010101@ds115963.mlab.com:15963/stack2709';
// Connect to Mongo
mongoose
  .connect(
    db,
    { useNewUrlParser: true }
  ) // Adding new mongo url parser
  .then(() => console.log('MongoDB Connected...'))
  .catch(err => console.log(err));

const port = process.env.PORT || 5000;

app.listen(port, () => console.log(`Server started on port ${port}`));

我已经为您制作了这个数据库。正如您在这里看到的，一切都很好。

希望我的回答对您有帮助!