Question

我正在使用Node.js运行这段代码：

var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://${server}:27017/${db}";
var username = '${user_name}';
var password = '${password}'
// Connect to the db
MongoClient.connect(url, function(err, db) {
  if(!err) {
    console.log("successfully connected to the database");
  }else{
    console.log("Error on connecting... aborting and exiting");
    return console.dir(err);
    throw err;
   }
    db.authenticate(username, password, function(err, res) {
    var startId = 7882;
    var userCount = 100;
    var num = 235;
    var baseGeologOrig = db.collection('geologs').find({user_id:279, created_at:{$gte:new Date("2015-01-31"), $lte:new Date("2015-02-02")}}).limit(1227);
    var baseGeolog = [];    
    baseGeologOrig.forEach(function (obj) {delete obj._id;baseGeolog.push(obj);});

// callback
    console.log("Reached here...!");
    console.log(baseGeologOrig);

现在当我运行这段代码时，我收到以下错误：

TypeError: undefined is not a function
 at /home/Scripts/node_modules/mongodb/lib/cursor.js:696:15
    at handleCallback (/home/Scripts/node_modules/mongodb/lib/utils.js:95:12)
    at /home/Scripts/node_modules/mongodb/lib/cursor.js:662:22
    at handleCallback (/home/Scripts/node_modules/mongodb/node_modules/mongodb-core/lib/cursor.js:244:5)
    at /home/Scripts/node_modules/mongodb/node_modules/mongodb-core/lib/cursor.js:659:22
    at queryCallback (/home/Scripts/node_modules/mongodb/node_modules/mongodb-core/lib/cursor.js:267:14)
    at Callbacks.emit (/home/Scripts/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:95:3)
    at null.messageHandler (/home/Scripts/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:243:23)
    at Socket.<anonymous> (/home/Scripts/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:262:22)
    at Socket.emit (events.js:107:17)

我测试了它，发现这个问题是我最后一行代码，任何想法如何解决？

先谢谢了！

Answer 1

你可能在var baseGeologOrig=本身得到一个未定义的值这就是你得到obj值未定义的原因请检查。

请吊起记录baseGeologOrig

TypeError：undefined不是使用javascript的nodejs中的函数

1 个答案: