Returning result of parse cloud code relation query

I'm using Parse Cloud Code to host a web application but I'm having a problem trying to get a relation query to work. I've tried an example from Coderwall http://ift.tt/1B6sJXN but I'm not sure how to gather the result of the query before trying to render the result.

function queryProducts(limit) {

  var post = Parse.Object.extend("Post");
  var query = new Parse.Query(post);
  query.limit(limit);

  var data = new Array();

  query.find().then(function (posts) {
    var cb = _.after(posts.length, function () {
      console.log("after"+ data);
      return data;
    });
    _.each(posts, function (post) {
      var images = post.relation("images");
      images.query().find().then(function (images) {
        data.push(post);
        cb();
      });
    });
  });
}

app.get('/', function (req, res) {
  results = queryProducts(10);
  res.render('index', { products: results });
});