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POHow to fetch data from external json file into a backbone view
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2013-06-25T06:04:00.410
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<p>I am trying to render a backbone view by accessing a list which is populated from a json using jquery-ajax.</p> <p>The problem i am facing is that the page gets rendered even before the ajax call is completed. I am not sure whether i can include the backbone model/view inside the success data inorder to make it work after fetching the data. If i replace the ajax call and write static json into a javascript variable then this will work fine. But i am not able to get this to work with an external call. </p> <p>The method i am using maybe incorrect and I would like a proper way to do this using backbone.</p> <p>Code is as follows : </p> <pre><code><!DOCTYPE html> <html> <head> <script class="jsbin" src="http://code.jquery.com/jquery-1.7.1.min.js"></script> <script class="jsbin" src="http://documentcloud.github.com/underscore/underscore-min.js"></script> <script class="jsbin" src="http://documentcloud.github.com/backbone/backbone.js"></script> <script> var stages; $.ajax({ type: 'GET', url: 'test.php', async:'false', data: { get_param: 'value' }, success: function (data) { window.stages = data; alert(stages); } }); alert(stages); // StageModel: no need to extend if you're not adding anything. StageModel = Backbone.Model; // StageCollection StageCollection = Backbone.Collection.extend({ model: StageModel }); // create view for list of stages StageCollectionView = Backbone.View.extend({ el: $("#stageNav"), initialize: function() { this.collection.bind('add', this.createStageListItem, this); }, events: { 'click .stageListItem' : 'selectStage' }, createStageListItem: function(model) { this.$("#stageList").append("<tr><td id=\"" + model.cid + "\" class='stageListItem'>" + model.get('label') +'</td><td>-'+ model.get('message') + "</td></tr>"); }, selectStage: function(event) { var cid = $(event.target).attr('id'); this.trigger('new-stage', this.collection.getByCid(cid)); }, render: function() { var self = this; this.collection.each(function(model) { self.createStageListItem(model); }); return this; } }); // StageView, StageView = Backbone.View.extend({ el: $("#stage"), initialize: function(options) { this.eventSource = options.newStageEventSource; this.eventSource.bind('new-stage', this.loadAndRenderStage, this); }, load: function(model) { this.model = model; return this; }, render: function() { $("#stageLabel").html(this.model.get('label')); $("#stageMsg").html(this.model.get('message')); }, loadAndRenderStage: function(stage) { this.load(stage); this.render(); } }); var stageCollection = new StageCollection(stages); var stageCollectionView = new StageCollectionView({ collection: stageCollection }); var stageView = new StageView({ newStageEventSource: stageCollectionView }); stageCollectionView.render(); </script> <meta charset=utf-8 /> <title>JS Bin</title> </head> <body> <div id="stageNav"> <table id="stageList"> </table> </div> <div id="stage"> <h3 id="stageLabel"></h3> <p id="stageMsg"></p> </div> </body> </html> </code></pre> <p>Many thanks</p> <p>Roy </p>
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<backbone.js><backbone-views>
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