javascript - MongoDB——client.open() 返回 "undefined in not a function"

Question

这是我所拥有的:

var express = require('express');
var MongoClient = require('mongodb').MongoClient;
var Server = require('mongodb').Server;

var app = express();

var client = new MongoClient(new Server('localhost', 27017, {}), {});

client.open(function(err, client){
//callback
});

当我运行它时，它指向 open 方法所在的行并显示“undefined is not a function”。我做错了什么？

Answer 1

来自mongo docs :

var MongoClient = require('mongodb').MongoClient

// Connection URL
var url = 'mongodb://localhost:27017/myproject';
// Use connect method to connect to the Server
MongoClient.connect(url, function(err, db) {
  console.log("Connected correctly to server");

  db.close();
});