问配置Mongodb for Heroku

EN

var mongo = require('mongodb');
var nodemailer = require("nodemailer");

var Server = mongo.Server,
Db = mongo.Db,
BSON = mongo.BSONPure;

var server = new Server('localhost', 27017, {auto_reconnect: true});
db = new Db('clients', server, {safe:false});

db.open(function(err, db) {
    if(!err) {
        console.log("Connected to 'clients' database");
        db.collection('clients', {strict:true}, function(err, collection) {
        if (err) {
                console.log("The 'clients' collection doesn't exist. Creating it with sample data...");
            populateDB();
            }
        });
    }
});

exports.findAll = function(req, res) {
    db.collection('clients', function(err, collection) {
        collection.find().toArray(function(err, items) {
            res.send(items);
        });
    });
};

var mongo = require('mongodb');

var mongoUri = process.env.MONGOLAB_URI ||
  process.env.MONGOHQ_URL ||
  'mongodb://localhost/mydb';

mongo.Db.connect(mongoUri, function (err, db) {
  db.collection('mydocs', function(er, collection) {
    collection.insert({'mykey': 'myvalue'}, {safe: true}, function(er,rs) {
    });
  });
});