Access log into MongoDB - Node.js - Express3.x - mongoose

app.js

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.use(express.favicon());
  app.use(express.logger(lib.log.db));

log.js

exports.log = {
  stream : fs.createWriteStream('./log/access.log', { flags: 'a'}),
  db : function(tokens, req, res){
    var date        = new Date(tokens.date(req)).getTime()
      , method      = tokens.method(req)
      , statusCode  = tokens.status(req, res)
      , parsedUrl   = url.parse(req.url)
      , urlpath     = parsedUrl.pathname
      , querys      = querystring.parse(parsedUrl.query)
      , referrer    = tokens.referrer(req)
      ;
    var log = new Log({
      date:       date,
      method:     method,
      statusCode: statusCode,
      url:        urlpath,
      querys:     querys,
      referrer:   referrer
    });
    return log.save();
  }
};

logmodel.js

var LogSchema = new Schema({
  date:         { type: Number },
  method:       { type: String },
  statusCode:   { type: Number },
  url:          { type: String },
  querys:       { type: Object },
  referrer:     { type: String }
});
exports.LogModel = mongoose.model('Log', LogSchema);