高级节点中的数据库连接错误和 Express FCC Challenge-Serialization of a passport user

Posted 2023-02-19

【中文标题】高级节点中的数据库连接错误和 Express FCC Challenge-Serialization of a passport user

【英文标题】：Database connection error in advanced node and express FCC Challenge-Serialization of a passport user

【发布时间】：2020-05-26 13:07:32

【问题描述】：

这是 freecodecamp 挑战链接请帮助我 FCC challenge link

我在 FCC 挑战中遇到数据库连接错误，谁能帮帮我。 This the image showing errors

我的故障项目链接 https://glitch.com/~chivalrous-pharaoh-mqknswso2j

Server.js 代码

‘use strict’;

const express = require(‘express’);
const bodyParser = require(‘body-parser’);
const fccTesting = require(’./freeCodeCamp/fcctesting.js’);
const session = require(‘express-session’);
const passport = require(‘passport’);
const ObjectId = require(‘mongodb’).ObjectId;
const mongodb = require(‘mongodb’).MongoClient;
const app = express();

fccTesting(app); //For FCC testing purposes
app.use(’/public’, express.static(process.cwd() + ‘/public’));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded( extended: true ));
app.set(‘view engine’, ‘pug’)

app.get(’/’, function (req, res) 
res.render(’/app/views/pug/index.pug’, title: ‘Hello’, message: ‘Please login’)
)

mongodb.connect(process.env.DATABASE, (err, db) => 
if(err) 
console.log('Database error: ’ + err);
 else 
console.log(‘Successful database connection’);
//serialization and app.listen

);

app.use(session(
secret: process.env.PORT,
resave: true,
saveUnintialized: true
));

passport.serializeUser((user, done) => 
done(null, user._id)
)

passport.deserializeUser((id, done) => 
mongodb.collection(‘users’).findOne(
_id: new ObjectId(id),
(err, doc) => 
if(err)
return done(err);

return done(null, doc);

);
);

app.use(passport.initialize);
app.use(passport.session);

app.listen(process.env.PORT || 3000, () => 
console.log("Listening on port " + process.env.PORT);
);

.env

SECRET=
MADE_WITH=
SESSION_SECRET=
DATABASE= 'mongodb+srv://Kuljeet:********@cluster0-gxlnb.mongodb.net/test?retryWrites=true&w=majority'

【参考方案1】：

我认为您必须在 server.js 中加载您的环境变量，这样您才能读取 process.env.DATABASE。

您可以使用dotenv 库。 https://www.npmjs.com/package/dotenv

npm install dotenv在你的项目中 将require('dotenv').config() 添加到您的server.js

例如

‘use strict’;

require('dotenv').config();
const express = require(‘express’);

希望这能回答您的问题。