node.js与mongodb，后npm安装mongodb，错误：TypeError：url.indexOf不是函数

我目前正在尝试使用MongoDB，Express和NodeJS一个简单的Hello World应用程序。node.js与mongodb，后npm安装mongodb，错误：TypeError：url.indexOf不是函数

该教程是How To Write A Simple Node.js/MongoDB Web Service for an iOS App

一切都很好，当我运行index.js没有NPM安装的MongoDB，代码初级讲座在这里。

经过的的package.json “MongoDB的” 修改相关性： “1.3.23” 和

npm update

然后index.js再次运行，错误是在这里：

user$ node index.js 

Failed to load c++ bson extension, using pure JS version 
/Users/liyan/Documents/OneDrive/MScCS/fos/testdb/node_modules/mongodb/lib/mongodb/connection/url_parser.js:14 
    if(url.indexOf("mongodb://") != 0) 
     ^

TypeError: url.indexOf is not a function 
    at exports.parse (/Users/liyan/Documents/OneDrive/MScCS/fos/testdb/node_modules/mongodb/lib/mongodb/connection/url_parser.js:14:10) 
    at Function.MongoClient.connect (/Users/liyan/Documents/OneDrive/MScCS/fos/testdb/node_modules/mongodb/lib/mongodb/mongo_client.js:167:16) 
    at MongoClient.connect (/Users/liyan/Documents/OneDrive/MScCS/fos/testdb/node_modules/mongodb/lib/mongodb/mongo_client.js:80:15) 
    at Object.<anonymous> (/Users/liyan/Documents/OneDrive/MScCS/fos/testdb/index.js:19:13) 
    at Module._compile (module.js:398:26) 
    at Object.Module._extensions..js (module.js:405:10) 
    at Module.load (module.js:344:32) 
    at Function.Module._load (module.js:301:12) 
    at Function.Module.runMain (module.js:430:10) 
    at startup (node.js:141:18)

index.js

var http = require('http'), 
    express = require('express'); 
    path = require('path'); 
    MongoClient = require('mongodb').MongoClient, 
    Server = require('mongodb').Server, 
    CollectionDriver = require('./collectionDriver').CollectionDriver; 
    bson = require('bson'); 

var app = express(); 
app.set('port', process.env.PORT || 3000); 
app.set('views', path.join(__dirname, 'views')); 
app.set('view engine', 'jade'); 

var mongoHost = 'localHost'; //A 
var mongoPort = 27017; 
var collectionDriver; 

var mongoClient = new MongoClient(new Server(mongoHost, mongoPort)); //B 
mongoClient.connect(function(err, mongoClient) { //C 
    if (!mongoClient) { 
     console.error("Error! Exiting... Must start MongoDB first"); 
     process.exit(1); //D 
    } 
    var db = mongoClient.db("MyDatabase"); //E 
    collectionDriver = new CollectionDriver(db); //F 
}); 


app.use(express.static(path.join(__dirname, 'public'))); 

app.get('/', function (req, res) { 
    res.send('<html><body><h1>First page res.send </h1></body></html>'); 
}); 

app.get('/:collection', function(req, res) { //A 
    var params = req.params; //B 
    collectionDriver.findAll(req.params.collection, function(error, objs) { //C 
      if (error) { res.send(400, error); } //D 
      else { 
       if (req.accepts('html')) { //E 
        res.render('data',{objects: objs, collection: req.params.collection}); //F 
       } else { 
       res.set('Content-Type','application/json'); //G 
        res.send(200, objs); //H 
       } 
     } 
    }); 
}); 

app.get('/:collection/:entity', function(req, res) { //I 
    var params = req.params; 
    var entity = params.entity; 
    var collection = params.collection; 
    if (entity) { 
     collectionDriver.get(collection, entity, function(error, objs) { //J 
      if (error) { res.send(400, error); } 
      else { res.send(200, objs); } //K 
     }); 
    } else { 
     res.send(400, {error: 'bad url', url: req.url}); 
    } 
}); 

app.use(function (req,res) { //1 
    res.render('404', {url:req.url}); //2 
}); 

http.createServer(app).listen(app.get('port'), function(){ 
    console.log('Express server listening on port ' + app.get('port')); 
});

collectionDriver.js

var ObjectID = require('mongodb').ObjectID; 

CollectionDriver = function(db) { 
    this.db = db; 
}; 

CollectionDriver.prototype.getCollection = function(collectionName, callback) { 
    this.db.collection(collectionName, function(error, the_collection) { 
    if(error) callback(error); 
    else callback(null, the_collection); 
    }); 
}; 

//find all objects for a collection 
CollectionDriver.prototype.findAll = function(collectionName, callback) { 
    this.getCollection(collectionName, function(error, the_collection) { //A 
     if(error) callback(error) 
     else { 
     the_collection.find().toArray(function(error, results) { //B 
      if(error) callback(error) 
      else callback(null, results) 
     }); 
     } 
    }); 
}; 

//find a specific object 
CollectionDriver.prototype.get = function(collectionName, id, callback) { //A 
    this.getCollection(collectionName, function(error, the_collection) { 
     if (error) callback(error) 
     else { 
      var checkForHexRegExp = new RegExp("^[0-9a-fA-F]{24}$"); //B 
      if (!checkForHexRegExp.test(id)) callback({error: "invalid id"}); 
      else the_collection.findOne({'_id':ObjectID(id)}, function(error,doc) { //C 
       if (error) callback(error) 
       else callback(null, doc); 
      }); 
     } 
    }); 
} 

exports.CollectionDriver = CollectionDriver;

来源

2016-01-07 Yan Li

mongoClient.connect(function(err, mongoClient) {})

您在这里使用错误的功能。 mongoClient.connect（'conntring'，callback）

mongoClient.open(function(err, mongoClient) {})

来源

2016-01-07 07:45:18 trquoccuong

它的工作原理，谢谢！ –

node.js与mongodb，后npm安装mongodb，错误：TypeError：url.indexOf不是函数

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