如何创建与node.js和MongoDB数据库的连接？ 那么它在哪里不起作用呢？您是否收到任何错误消息？如果您更专业，则更容易提供帮助：在下面给出的行中，当我在terminalubuntu 12.04 LTS 64位上运行代码时，应该会生成错误。为什么，我

如何创建与node.js和MongoDB数据库的连接？

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那么它在哪里不起作用呢？您是否收到任何错误消息？如果您更专业，则更容易提供帮助：在下面给出的行中，当我在terminalubuntu 12.04 LTS 64位上运行代码时，应该会生成错误。为什么，我不知道，请告诉我哪里错了/usr/local/nodejs/bin/MyWork/Live_1/connect.js:10 BSON=require'mongodb'.pure.BSON，^TypeError:undefined不是对象上的函数/usr/local/nodejs/bin/MyWork/Live_1/connect.js:10:31 at Module.\u编译Module.js:462:26 at Object.Module.\u extensions..js Module.js:480:10 at Module.load Module.js:357:32 at Function.Module.\u加载Module.js:312:12 at Function.runMain Module.js:503:10 at startup node.js:132:16 at node.js:817:3

var Db = require('mongodb').Db,
MongoClient = require('mongodb').MongoClient,
Server = require('mongodb').Server,
ReplSetServers = require('mongodb').ReplSetServers,
ObjectID = require('mongodb').ObjectID,
Binary = require('mongodb').Binary,
GridStore = require('mongodb').GridStore,
Grid = require('mongodb').Grid,
Code = require('mongodb').Code,
BSON = require('mongodb').pure().BSON,
assert = require('assert');

// Set up the connection to the local db
var mongoclient = new MongoClient(new Server("localhost", 27017), {native_parser: true});

// Open the connection to the server
mongoclient.open(function(err, mongoclient) {

// Get the first db and do an update document on it
var db = mongoclient.db("braj");
db.collection('logintbl').update({a:1}, {b:1}, {upsert:true}, function(err, result) {
  assert.equal(null, err);
  assert.equal(1, result);

// Get another db and do an update document on it
  var db2 = mongoclient.db("braj");
  db2.collection('logintbl').update({a:1}, {b:1}, {upsert:true}, function(err, result) {
   assert.equal(null, err);
   assert.equal(1, result);

// Close the connection
  mongoclient.close();

    });
  });
});