gistfile1.js

  async.parallel({
    /*collections: function (callback) {
      Collection.find().populate('parent children').sort('position').exec(callback);
    },*/
    featured: function (callback) {
      Page.findAndPopulate({
        featured: true
      }, callback);
    },
    whatsOn: function (callback) {
      var whatsOn = [];
      Collection.findOne({url: 'whats-on'}).populate('children', null, null, {sort: 'position'}).exec(function (error, collection) {
        async.forEachSeries(collection.children, function (child, callback) {
          Collection.findAndPopulate({_id: child._id}, function (error, child) {
            if (child) whatsOn.push(child);
            callback();
          });
        }, function (error) {
          callback(error, whatsOn);
        });
      });
    },
    opportunities: function (callback) {
      Collection.findAndPopulate({url: 'opportunities'}, callback);
    },
    news: function (callback) {
      Collection.findAndPopulate({url: 'news'}, callback);
    },
    contact: function (callback) {
      Collection.findAndPopulate({url: 'contact'}, callback);
    },
    about: function (callback) {
      Collection.findAndPopulate({url: 'about'}, callback);
    }
  }, function (error, results) {
    if (error) console.log(error);
    if (results.news.pages.length) results.news.pages = results.news.pages.slice(0, 3);
    res.render('client/views/index', {
      whatsOn: results.whatsOn,
      featured: results.featured,
      opportunities: results.opportunities,
      news: results.news,
      contact: results.contact,
      about: results.about,
      collection: {url: 'index'}
    });
  });
};