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POBackbone FETCH from JSON, edit model data then SAVE back to JSON
 

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    <p>I've been working through Code School's Anatomy of Backbone.js course, but am confused when trying to save model changes back to the server. Perhaps you can help.</p> <p>This is what I understand needs to happen:</p> <ol> <li>Populate collection from a JSON data source using fetch();</li> <li>Append the collection to the DOM</li> <li>Edit a model (uncheck checkbox, which sets 'favourite' to false)</li> <li>Save the model.</li> </ol> <p>My assumption is that if I were to unselect a record as a 'favourite' then hit refresh, the change would be persistant and also evident in the JSON file. However, this isn't the case and the original collection is loaded and JSON is unchanged.</p> <p>I think my confusion is in using the fetch method and declaring the URL within the model and collection.</p> <p><em><strong>How can I get this model change to be persistant?</em></strong></p> <p><strong>Model:</strong></p> <pre><code>var Contact = Backbone.Model.extend({ url: '/contacts', defaults:{ favourite: false }, toggleFavourite: function(){ if(this.get('favourite') === false) { this.set({ 'favourite': true }); } else { this.set({ 'favourite': false }) } this.save(); } }); </code></pre> <p><strong>Collection</strong></p> <pre><code>var Contacts = Backbone.Collection.extend({ model: Contact, url: '/contacts' }); </code></pre> <p><strong>Views</strong></p> <pre><code>var ContactView = Backbone.View.extend({ className: 'record', template: _.template('&lt;span&gt;&lt;%= name %&gt;&lt;/span&gt;' + '&lt;span class="phone-number"&gt;&lt;%= phone %&gt;&lt;/span&gt;' + '&lt;input type="checkbox" &lt;% if(favourite === true) print("checked") %&gt;/&gt;'), events: { 'change input': 'toggleFavourite', 'click .phone-number': 'dial' }, initialize: function(){ this.model.on('change', this.render, this); }, toggleFavourite: function(e){ this.model.toggleFavourite(); }, dial: function(e){ alert('Dialing now...'); }, render: function(){ this.$el.html(this.template(this.model.toJSON())); return this; } }); var ContactsView = Backbone.View.extend({ initialize: function(){ this.collection.on('add', this.addOne, this); this.collection.on('reset', this.addAll, this); }, addOne: function(contact){ var contactView = new ContactView({ model: contact }); this.$el.append(contactView.render().el); }, addAll: function(){ this.collection.forEach(this.addOne, this); }, render: function(){ this.addAll(); } }); </code></pre> <p><strong>App.js</strong></p> <pre><code>var contacts = new Contacts(); //creates list contactsView = new ContactsView({ collection: contacts}); //creates list view contacts.fetch({url: 'contacts/data.json'}); //populates list $('#mainPanel').append(contactsView.el); //appends list to DOM </code></pre>
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