creating a dinamically restful api for node.js

I'm using mongodb for pretty much everything in my node.js application, and now i want create a restful application, so, i did that:

I'm trying to do just the get method, for now:

restApi.js:

var restAPI = {

  get: function(method, model, sort, limit, options) {
    if (method !== 'get') {
      return;
    }

    model.find(options).sort(sort).limit(3).exec(function (error, result) {
      if (error) {
        return error;
      } else {
        return result;
      }
    });

  },
};

And now i can require this in my route:

var restApi = require('restApi');

and use like this:

app.get('/', function(req, res, next) {
  var result = restAPI.get('get', Event, 'date', 3, {'isActive': true});

  res.render('/', {
    result: result
  });
});

Is not working, the result is undefined. Why??

How can i transform this in a async function with callback? This is possible?

Thanks! :)