node.js - 连接mongodb时出现错误，Error: collection name must be a String

问题描述

问题解答

根据文档，不能使用Collection直接构造Collection实例:

Collection() Create a new Collection instance (INTERNAL TYPE, do not instantiate directly)

正确代码如下:

var Db = require(’mongodb’).Db, Server = require(’mongodb’).Servervar db = new Db(’test01’, new Server(’localhost’, 27017));db.open(function(err, client) { if (err) throw err; console.log(’connected to server’); var collection = db.collection(’student’); collection.find(function(err, cursor) { cursor.each(function(err, doc) { if (doc) {console.log(doc.uname); } }); });});

参考MongoDB官方文档