nodejs连接mongodb的方法

一、

var express = require('express');
var mongodb = require('mongodb');

var app = express();

app.use(express.static('./website'));

var url = 'mongodb://localhost:10089/test';

mongodb.MongoClient.connect(url, function (err, db) {
    if (err) {
        console.log(err);

        return false;
    }

    console.log(db);
});

app.listen(9000);

console.log('running');

二、

1、定义mongodb的连接串：

test_163:/home/exenode/part3/scms/config # more env/development.js
module.exports = {
        port:7101,
        mongodb:'mongodb://localhost:10089/scms'
}

　2、导出此连接串的配置：

test_163:/home/exenode/part3/scms/config # more config.js
var config = null;

if (process && process.env && process.env.NODE_ENV){
        config = require("./env/"+ process.env.NODE_ENV + ".js");
}else{
        config = require("./env/development.js");
};

module.exports = config;

　3、使用mongoose.connect("连接串")  方法连接mongodb

test_163:/home/exenode/part3/scms/config # more mongoose.js
var mongoose = require('mongoose');
var config = require('./config');

module.exports = function(){
        console.log("config:",config.mongodb);
        var db= mongoose.connect(config.mongodb);
        require('../app/models/news.server.model');
        return db;
}

4、在 app.js 中执行 mongoose.js 中导出的方法，连接mongodb：　

test_163:/home/exenode/part3/scms # more app.js
var express = require('./config/express');
var mongodb = require('./config/mongoose');

var db = mongodb();
var app = express();

module.exports = app;