MongoDB 未连接

Question

我的代码是：

var MongoClient = require("mongodb").MongoClient;
var url = "mongodb://localhost:27017/";

MongoClient.connect(url,function(err,db){
    if(err) throw err;
    var dbo = db.db("school");
    dbo.createCollection("students",function(err,res){
        console.log("collection created!!!");
    });
    var myObjList=[
        {
            name:"rohit",
            age:15,
            gpa:4.9
        },
        {
            name:"rahul",
            age:17,
            gpa:4.7
        }
    ]
    dbo.collection("students").insertMany(myObjList,function(err,res){
        if(err) throw err;
        console.log(res);
        db.close();
    })
});

我想将数据插入 MongoDB 存储，但未能将数据插入 MongoDB 存储。此代码未建立 MongoDB 连接。当我尝试运行 Node js 代码但在控制台中看到此错误时：

const timeoutError = new error_1.MongoServerSelectionError(`Server selection timed out after ${serverSelectionTimeoutMS} ms`, this.description);
                                 ^

MongoServerSelectionError: connect ECONNREFUSED ::1:27017
    at Timeout._onTimeout (C:\Users\Administrator\node_modules\mongodb\lib\sdam\topology.js:278:38)
    at listOnTimeout (node:internal/timers:564:17)
    at process.processTimers (node:internal/timers:507:7) {
  reason: TopologyDescription {
    type: 'Unknown',
    servers: Map(1) {
      'localhost:27017' => ServerDescription {
        address: 'localhost:27017',
        type: 'Unknown',
        hosts: [],
        passives: [],
        arbiters: [],
        tags: {},
        minWireVersion: 0,
        maxWireVersion: 0,
        roundTripTime: -1,
        lastUpdateTime: 2471400,
        lastWriteDate: 0,
        error: MongoNetworkError: connect ECONNREFUSED ::1:27017
            at connectionFailureError (C:\Users\Administrator\node_modules\mongodb\lib\cmap\connect.js:379:20)
            at Socket.<anonymous> (C:\Users\Administrator\node_modules\mongodb\lib\cmap\connect.js:285:22)
            at Object.onceWrapper (node:events:628:26)
            at Socket.emit (node:events:513:28)
            at emitErrorNT (node:internal/streams/destroy:151:8)
            at emitErrorCloseNT (node:internal/streams/destroy:116:3)
            at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
          [Symbol(errorLabels)]: Set(1) { 'ResetPool' },
          [cause]: Error: connect ECONNREFUSED ::1:27017
              at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1300:16) {
            errno: -4078,
            code: 'ECONNREFUSED',
            syscall: 'connect',
            address: '::1',
            port: 27017
          }
        },
        topologyVersion: null,
        setName: null,
        setVersion: null,
        electionId: null,
        logicalSessionTimeoutMinutes: null,
        primary: null,
        me: null,
        '$clusterTime': null
      }
    },
    stale: false,
    compatible: true,
    heartbeatFrequencyMS: 10000,
    localThresholdMS: 15,
    setName: null,
    maxElectionId: null,
    maxSetVersion: null,
    commonWireVersion: 0,
    logicalSessionTimeoutMinutes: null
  },
  code: undefined,
  [Symbol(errorLabels)]: Set(0) {},
  [cause]: MongoNetworkError: connect ECONNREFUSED ::1:27017
      at connectionFailureError (C:\Users\Administrator\node_modules\mongodb\lib\cmap\connect.js:379:20)
      at Socket.<anonymous> (C:\Users\Administrator\node_modules\mongodb\lib\cmap\connect.js:285:22)
      at Object.onceWrapper (node:events:628:26)
      at Socket.emit (node:events:513:28)
      at emitErrorNT (node:internal/streams/destroy:151:8)
      at emitErrorCloseNT (node:internal/streams/destroy:116:3)
      at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
    [Symbol(errorLabels)]: Set(1) { 'ResetPool' },
    [cause]: Error: connect ECONNREFUSED ::1:27017
        at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1300:16) {
      errno: -4078,
      code: 'ECONNREFUSED',
      syscall: 'connect',
      address: '::1',
      port: 27017
    }
  }
}

请帮我解决这个问题。

Answer 1

MongoDb URL应该更改为

mongodb://0.0.0.0:27017

，我也借此机会编辑了代码。

var MongoClient = require("mongodb").MongoClient;
var url = "mongodb://0.0.0.0:27017/";

MongoClient.connect(url,function(err,db){
    if(err) {
       console.log("error connecting" + err);
       }
    console.log("connection successful");
    var dbo = db.db("school");
    dbo.createCollection("students",function(err,res){
    if(err){
        console.log("error creating collection: "+err);
          db.close();
           return;
          }
        console.log("collection created!!!");
    });
    var myObjList=[
        {
            name:"rohit",
            age:15,
            gpa:4.9
        },
        {
            name:"rahul",
            age:17,
            gpa:4.7
        }
    ]
    dbo.collection("students").insertMany(myObjList,function(err,res){
        if(err){
        console.log("error inserting " + myObjList +": "+err);
          db.close();
           return;
          }
        console.log(res);
        db.close();
    })
});

由于您在终端得到空输出，我创建了一些控制台日志，以便您在遇到错误时收到通知。

快乐编码！