nodejs mongodb

https://zellwk.com/blog/crud-express-mongodb/

有两个过期的地方：

1. MongoDB 在线服务网站 https://mlab.com 500M 免费空间，好测试。
2. MongoClient.connect 的回调返回值, db => client (SO 上找解决方案)

console.log('May Node be with you')

var express = require ('express');
var bodyParser = require ('body-parser')
var app = express();

var db;
var MongoClient = require('mongodb').MongoClient
MongoClient.connect('mongodb://<dbuser>:<dbpassword>@ds133746.mlab.com:33746/hello', { native_parser: true }, function (err, client) {
    if (err) return console.log(err);
    db = client.db('hello');

    app.listen(3000, function () {
        console.log('l on http://localhost:3000');
    })
})

app.use(bodyParser.urlencoded({ extended: true }))

app.get('/', function (req, res) {
    res.sendFile(__dirname + '/index.html');
})

app.post('/quotes', function (req, res) {
    console.log(req.body);
    db.collection('quotes').save(req.body, function (err, result) {
        if (err) {
            console.log('save db err');
            return console.log(err);
        }

        console.log('save to db');
        res.redirect('/');
    });
})