gistfile1.js

  window.ConsoleDay = Backbone.Model.extend({
    initialize: function() {
      _.bindAll(this, 'addWearing', 'addWearings', 'updateWearingsCount', 'getDiv');
      this.wearings = new WearingCollection;
      this.wearings.url = "/days/" + this.get("date") + "/wearings";
      this.wearings.bind("add",     this.updateWearingsCount);
      this.wearings.fetch();
    },
    updateWearingsCount : function() {
      this.getDiv().find(".item_count").text("(" + this.wearings.length + " items)");
      return this;
    }