node.js - 无法使用 mongoose 连接到 mongodb atlas
问题描述
我需要帮助!!!我尝试使用连接字符串连接到 mongodb atlas,但无法连接。我不确定如何进行。我有一个准系统应用程序。我收到连接错误(mongooseServerSelectionError)和未处理的 Promise Rejection 警告。
这是错误:
connection error: MongooseError [MongooseServerSelectionError]: connect ECONNREFUSED 127.0.0.1:27017
at new MongooseServerSelectionError (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/node_modules/mongoose/lib/error/serverSelection.js:22:11)
at NativeConnection.Connection.openUri (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/node_modules/mongoose/lib/connection.js:808:32)
at Mongoose.connect (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/node_modules/mongoose/lib/index.js:333:15)
at Object.<anonymous> (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/server/db/index.js:4:10)
at Module._compile (internal/modules/cjs/loader.js:1157:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
at Module.load (internal/modules/cjs/loader.js:1001:32)
at Function.Module._load (internal/modules/cjs/loader.js:900:14)
at Module.require (internal/modules/cjs/loader.js:1043:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object.<anonymous> (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/server/bin.js:33:10)
at Module._compile (internal/modules/cjs/loader.js:1157:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
at Module.load (internal/modules/cjs/loader.js:1001:32)
at Function.Module._load (internal/modules/cjs/loader.js:900:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12) {
message: 'connect ECONNREFUSED 127.0.0.1:27017',
name: 'MongooseServerSelectionError',
reason: TopologyDescription {
type: 'Single',
setName: null,
maxSetVersion: null,
maxElectionId: null,
servers: Map { 'localhost:27017' => [ServerDescription] },
stale: false,
compatible: true,
compatibilityError: null,
logicalSessionTimeoutMinutes: null,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
commonWireVersion: null
},
[Symbol(mongoErrorContextSymbol)]: {}
}
(node:9182) UnhandledPromiseRejectionWarning: MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017
at new MongooseServerSelectionError (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/node_modules/mongoose/lib/error/serverSelection.js:22:11)
at NativeConnection.Connection.openUri (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/node_modules/mongoose/lib/connection.js:808:32)
at Mongoose.connect (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/node_modules/mongoose/lib/index.js:333:15)
at Object.<anonymous> (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/server/db/index.js:4:10)
at Module._compile (internal/modules/cjs/loader.js:1157:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
at Module.load (internal/modules/cjs/loader.js:1001:32)
at Function.Module._load (internal/modules/cjs/loader.js:900:14)
at Module.require (internal/modules/cjs/loader.js:1043:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object.<anonymous> (/Users/jagnoorg/Documents/personal-projects/monkey-den/project2/server/bin.js:33:10)
at Module._compile (internal/modules/cjs/loader.js:1157:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
at Module.load (internal/modules/cjs/loader.js:1001:32)
at Function.Module._load (internal/modules/cjs/loader.js:900:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
(node:9182) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:9182) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
这是我的代码:
我指示要连接到哪个 uri,通过 mongoose 设置连接,导出数据库并在app.js中打开连接...
在db/index.js里面:
var mongoose = require('mongoose');
mongoose.Promise = global.Promise;
// const uri = require('../../keys.js').mongodb.dbURI;
mongoose.connect("mongodb://localhost/test", { useNewUrlParser: true, useUnifiedTopology: true});
// mongoose.connect(process.env.MONGODB_URL || uri, { useNewUrlParser: true, useUnifiedTopology: true});
var db = mongoose.connection;
db.on("error", console.error.bind(console, "connection error: "));
module.exports = db;
在app.js里面:
console.log('NODE_ENV :::', process.env.NODE_ENV);
if (process.env.NODE_ENV === 'PRODUCTION') {
var app = require('./prod.app.js');
} else {
var app = require('./dev.app.js');
}
var express = require('express');
var path = require('path');
var routes = require('./db/routes/index.js');
var http = require('http');
var favicon = require('serve-favicon');
var PORT = 3000;
/*
* shared code in production and development
*/
// favicon - 3 ways - middleware, static, html
app.use(favicon(path.join(__dirname, '../public/images/favicon.ico')));
// app.use('/favicon.ico', express.static(path.join(__dirname, '../public/images/favicon.ico')));
// app.use('images/favicon.ico', express.static(path.join(__dirname, '../public/images/favicon.ico')));
app.use(express.json());
app.use(express.urlencoded({ extended: true}));
// static files
app.use(express.static(path.join(__dirname, "../client")));
app.use(express.static(path.join(__dirname, "../public")));
// db - mongo
var db = require('./db/index.js');
db.once("open", function (err) {
// console.log('db::: ', db);
if (err) {
return console.error(err);
} else {
console.log("Successfully connected to mongodb");
}
})
// routes
app.use(routes);
// serve index.html if can't find the route
app.use('*', function (req, res, next) {
console.log("...serving index.html file from the public folder")
res.sendFile(path.join(__dirname, '../public/index.html'));
});
// create server
var server = http.createServer(app);
server.listen(PORT);
console.log(`server listening on post ${PORT}`);
谢谢你帮我调查这个
解决方案
你的 app.js 中有这一行app.use(cors())
吗?
尝试删除此行并删除所有涉及 cors 的内容。
如果这不起作用,请在 MongoDB Atlas 的网络访问中检查您的 IP 白名单并添加您当前的 IP 或写入此 0.0.0.0/0 以允许所有 IP。
推荐阅读
- javascript - 无法在 React 中正确设置 PropTypes 在几个备选方案之间弹跳
- go - 地图范围循环中的空接口
- c# - MVC 在属性内调用资源文件
- c++ - 如何在 C++ 中从客户端取消服务器端流式调用?
- d3.js - 如何在使用 d3.js 显示数据的鼠标上绘制垂直线
- yaml - ruamel 压缩评论并注入 0x07
- google-chrome-extension - 我怎样才能将“文本”转换为“可下载的 url”?
- java - 如何使用 JSoup 打印此 HTML 表格的内容?
- postgresql - POSTGRESQL查询:有空格不返回结果,使用下划线返回结果
- email - Laravel 无法在任何 mail_encryption(tls、ssl、starttls)上建立连接主机