因此，我正在使用 js、express 和 MongoDB 構建一個小型 URL 縮短器專案，但是當我嘗試運行本地服務器時出現錯誤并且無法連接到 MongoDB！這是我的代碼：
const express = require('express')
const mongoose = require('mongoose')
const ShortUrl = require('./models/shortUrl')
const app = express();
mongoose.connect('mongodb://localhost/urlShortener', {
useNewUrlParser: true, useUnifiedTopology: true
})
app.set('view engine', 'ejs')
app.use(express.urlencoded({ extended: false}))
app.get('/', async (req, res) => {
const shortUrls = await ShortUrl.find()
res.render('index', { shortUrls: shortUrls })
});
app.post('/shortUrls', async (req, res) => {
await ShortUrl.create({ full: req.body.fullUrl })
res.redirect('/')
})
app.get('/:shortUrl', async (req, res) => {
const shortUrl = await ShortUrl.findOne({ short: req.params.shortUrl })
if (shortUrl == null) return res.sendStatus(404)
shortUrl.clicks
shortUrl.save()
res.redirect(shortUrl.full)
})
app.listen(process.env.PORT || 5000);
這是完整的日志：
[nodemon] 2.0.15
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: js,mjs,json
[nodemon] starting `node server.js`
C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongoose\lib\connection.js:807
const serverSelectionError = new ServerSelectionError();
^
MongooseServerSelectionError: connect ECONNREFUSED ::1:27017
at NativeConnection.Connection.openUri (C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongoose\lib\connection.js:807:32)
at C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongoose\lib\index.js:342:10
at C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongoose\lib\helpers\promiseOrCallback.js:32:5
at new Promise (<anonymous>)
at promiseOrCallback (C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongoose\lib\helpers\promiseOrCallback.js:31:10)
at Mongoose._promiseOrCallback (C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongoose\lib\index.js:1176:10)
at Mongoose.connect (C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongoose\lib\index.js:341:20)
at Object.<anonymous> (C:\Users\apsoltanian-pc\Documents\js\url-shortener\server.js:6:10)
at Module._compile (node:internal/modules/cjs/loader:1099:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10) {
reason: TopologyDescription {
type: 'Unknown',
servers: Map(1) {
'localhost:27017' => ServerDescription {
_hostAddress: HostAddress { isIPv6: false, host: 'localhost', port: 27017 },
address: 'localhost:27017',
type: 'Unknown',
hosts: [],
passives: [],
arbiters: [],
tags: {},
minWireVersion: 0,
maxWireVersion: 0,
roundTripTime: -1,
lastUpdateTime: 1096791,
lastWriteDate: 0,
error: MongoNetworkError: connect ECONNREFUSED ::1:27017
at connectionFailureError (C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongodb\lib\cmap\connect.js:381:20)
at Socket.<anonymous> (C:\Users\apsoltanian-pc\Documents\js\url-shortener\node_modules\mongodb\lib\cmap\connect.js:301:22)
at Object.onceWrapper (node:events:642:26)
at Socket.emit (node:events:527:28)
at emitErrorNT (node:internal/streams/destroy:164:8)
at emitErrorCloseNT (node:internal/streams/destroy:129:3)
at processTicksAndRejections (node:internal/process/task_queues:83:21)
}
},
stale: false,
compatible: true,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
logicalSessionTimeoutMinutes: undefined
}
}
Node.js v17.7.2
[nodemon] app crashed - waiting for file changes before starting...
謝謝你們=）
我試圖啟動我在 js、express 和 MongoDB 中撰寫的小型 URL-shortener 專案，但是問題是我無法連接到我的 MongoDB 資料庫:(
uj5u.com熱心網友回復：
我解決了這個問題，所以，我在連接字串中用 127.0.0.1 替換了 localhost，現在我的問題解決了！這是因為一些 ipv6 配置......謝謝你 :)
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標籤：javascript mongodb 表示