Get model from collection in app

assets/app/app.js

@@ -21,6 +21,7 @@ define([
 
   var Application = Marionette.Application;
   var SlideCollection = Backbone.Collection.extend({
+    model: SlideModel,
     url: '/slides'
   });
 
@@ -34,6 +35,10 @@ define([
   App.prototype = new Application();
 
   _.extend(App.prototype, {
+    model: null,
+    view: null,
+    currentSlide: null,
+
     initialize: function initialize(options) {
       options = options || {};
 
@@ -41,6 +46,7 @@ define([
 
       this.module('listener', Listener);
 
+      this.currentSlide = 0;
       this.model = new SlideModel();
       this.view = new SlideView({el: options.el, model: this.model});
 
@@ -48,6 +54,10 @@ define([
       this.listenTo(this.router.model, 'change:slide', function (model, num) {
         this.triggerMethod('slide:change', num);
       }, this);
+
+      this.listenTo(this.collection, 'sync', function () {
+        this.onSlideChange(this.currentSlide);
+      }, this);
     },
 
     goToSlide: function goToSlide(nextId) {
@@ -71,8 +81,15 @@ define([
 
     onSlideChange: function onSlideChange(num) {
       $('body').removeClass().addClass('page-' + num);
-      this.model.set('id', num);
-      this.model.fetch();
+      var model = this.collection.get(num);
+      var view = this.view;
+      if (model) {
+        model.fetch();
+        this.model = model;
+        view.model = model;
+        view.render();
+      }
+      this.currentSlide = num;
     }
   });
 

assets/app/widgets/slide/model.js

@@ -9,8 +9,22 @@ define(['underscore', 'backbone'], function SlideModelDefine(_, Backbone) {
   SlideModel.prototype = new Model();
 
   _.extend(SlideModel.prototype, {
+    defaults: function defaults() {
+      return {
+        copy: '',
+        slug: ''
+      };
+    },
+
     url: function url() {
       return '/slide/' + this.get('id');
+    },
+
+    fetch: function fetch() {
+      if (this.get('copy') !== '') {
+        return;
+      }
+      return Model.prototype.fetch.apply(this, arguments);
     }
   });
 

bin/deck

@@ -74,7 +74,7 @@ app.get('/slides', function showHandler(req, res) {
     }
 
     res.send(_.map(files, function (file, index) {
-      return {id: index + 1};
+      return {id: index + 1, slug: file.replace(/\.md$/, '')};
     }));
   });
 });
@@ -101,7 +101,11 @@ app.get(/slide\/(\d+)/, function showHandler(req, res, next) {
       if (err) {
         return renderError(res, err);
       }
-      res.send({id: toInt(slideIndex), copy: content});
+      res.send({
+        copy: content,
+        id: toInt(slideIndex),
+        slug: markdownFile.replace(/\.md$/, '')
+      });
     });
   });
 });