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POHandling undefined attributes in underscore.js templates
 

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    <p>I am rendering a single Backbone model in a view. I am using the default underscore template to render the model. How do I handle the "undefined" attribute errors when I am rendering the view (though the model has not loaded)? To clarify, here is an example.</p> <pre><code>// Using Mustache style markers _.templateSettings = { interpolate : /\{\{(.+?)\}\}/g }; App.Model = Backbone.Model.extend({}); App.Collection = Backbone.Collection.extend({ model: App.Model }); App.View = Backbone.View.extend({ initialize: function() { _.bindAll(this, 'render'); this.template = _.template($('#model_template').html()); this.model.bind('reset', this.render); }, render: function() { var renderedContent = this.template(this.model.toJSON()); $(this.el).html(renderedContent); return this; } }); // HTML &lt;div id="container"&gt;&lt;/div&gt; &lt;script id="model_template" type="text/template"&gt; &lt;strong&gt;Name:&lt;/strong&gt; {{ name }} &lt;br/&gt; &lt;strong&gt;Email:&lt;/strong&gt; {{ email }} &lt;br/&gt; &lt;strong&gt;Phone:&lt;/strong&gt; {{ phone }} &lt;/script&gt; // Run code var collection = new App.Collection; var view = new App.View(model: collection.at(0)); $('#container').html(view.render().el); collection.fetch(); </code></pre> <p>When this code is run, the view is rendered twice, first with an empty model and second when the AJAX query is complete (and 'reset' is triggered). But the issue I am facing is JS stops at the first instance when the model is empty. It gives an error saying the model attribute is undefined.</p> <p>What am I doing wrong here? Can I suppress the 'undefined' error when the view is rendered in the first instance?</p>
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    1. COIf you need to render a view with an empty model, I probably tend toward defaults as abraham has mentioned. Otherwise your templates could accommodate conditionals. See http://stackoverflow.com/questions/7230470/how-to-use-if-statements-in-underscore-js-templates/9321127#9321127
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    2. COThanks, SunnyRed. This looks like a good idea if the number of attributes are less. I have 20+ attributes in my template! Would be a tough thing to manage.
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