无法连接 mongodb localhost:27017

Question

我尝试使用 nodejs 服务器和 express 连接 mongodb。我的 mongoose 版本是 5.2.0，mongodb 版本是 4.0。我尝试了多种连接 mongodb 的方法，但 mongod 服务器只是一直在监听，不与服务器连接，也没有创建数据库。我曾尝试与 mongoose 和 mongoclient 连接，但 cmd 中的 mongod 只是一直在听，没有连接。这是我的服务器代码

var express = require('express');
var mongoose = require('mongoose');

var User = require('./models/user');
var app = express();


var db = mongoose.connect("mongodb://localhost:27017/server", { useNewUrlParser: true }, function(err, response) {
    if(err) {
        console.log('There is error in connecting with mongodb');
    }
    console.log('Connection has been established.');
})

cmd中的mongod

2019-01-13T23:56:05.690+0500 I CONTROL  [initandlisten]
2019-01-13T23:56:05.691+0500 I CONTROL  [initandlisten] ** WARNING: This server is bound to localhost.
2019-01-13T23:56:05.691+0500 I CONTROL  [initandlisten] **          Remote systems will be unable to connect to this server.
2019-01-13T23:56:05.692+0500 I CONTROL  [initandlisten] **          Start the server with --bind_ip <address> to specify which IP
2019-01-13T23:56:05.692+0500 I CONTROL  [initandlisten] **          addresses it should serve responses from, or with --bind_ip_all to
2019-01-13T23:56:05.693+0500 I CONTROL  [initandlisten] **          bind to all interfaces. If this behavior is desired, start the
2019-01-13T23:56:05.693+0500 I CONTROL  [initandlisten] **          server with --bind_ip 127.0.0.1 to disable this warning.
2019-01-13T23:56:05.694+0500 I CONTROL  [initandlisten]
2019-01-13T23:56:06.073+0500 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
2019-01-13T23:56:06.078+0500 I NETWORK  [initandlisten] waiting for connections on port 27017

mongo in cmd 另一个窗口

C:\Program Files\MongoDB\Server\4.0\bin>mongo
MongoDB shell version v4.0.2
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 4.0.2
Server has startup warnings:
2019-01-11T20:05:57.109+0500 I CONTROL  [initandlisten]
2019-01-11T20:05:57.113+0500 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2019-01-11T20:05:57.114+0500 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2019-01-11T20:05:57.114+0500 I CONTROL  [initandlisten]
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Answer 1

您应该将您的mongodb.bat 更改为下面提到的命令：-

"C:\Program Files\MongoDB\Server\4.2\bin\mongod.exe" --dbpath "f:\mongodb\data"