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PO"How" to save an entire collection in Backbone.js - Backbone.sync or jQuery.ajax?
 

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  1. PO"How" to save an entire collection in Backbone.js - Backbone.sync or jQuery.ajax?
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    <p>I am well aware it can be done and I've looked at quite a few places (including: <a href="https://stackoverflow.com/questions/5014216/best-practice-for-saving-an-entire-collection">Best practice for saving an entire collection?</a>). But I'm still not clear "exactly how" is it written in code? (the post explains it in English. It'd be great to have a javascript specific explanation :)</p> <p>Say I have a collection of models - the models themselves may have nested collections. I have overridden the toJSON() method of the parent collection and I am getting a valid JSON object. I wish to "save" the entire collection (corresponding JSON), but backbone doesn't seem to come in-built with that functionality.</p> <pre><code>var MyCollection = Backbone.Collection.extend({ model:MyModel, //something to save? save: function() { //what to write here? } }); </code></pre> <p>I know somewhere you have to say:</p> <pre><code>Backbone.sync = function(method, model, options){ /* * What goes in here?? If at all anything needs to be done? * Where to declare this in the program? And how is it called? */ } </code></pre> <p>Once the 'view' is done with the processing it is responsible for telling the collection to "save" itself on the server (capable of handling a bulk update/create request). </p> <p>Questions that arise:</p> <ol> <li>How/what to write in code to "wire it all together"?</li> <li>What is the 'right' location of the callbacks and how to specify a "success/error" callback? I mean syntactically?I'm not clear of the syntax of registering callbacks in backbone...</li> </ol> <p>If it is indeed a tricky job then can we call jQuery.ajax within a view and pass the <code>this.successMethod</code> or <code>this.errorMethod</code> as success/error callbacks?? Will it work?</p> <p>I need to get in sync with backbone's way of thinking - I know I'm definitely missing something w.r.t., syncing of entire collections.</p>
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    1. COCan your server-side code take this as a single request? In other words, the entire top level collection, all models, and nested collections as a single JSON packet? Or, do you need to save each model individually? Edit: Ah, read closer, the server IS capable of "bulk update/create"
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    2. CO@Edward: Yup! Had made that explicit since it's usually a point of concern, but not in this case :)
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    3. COSo, what is the structure of the data the server is expecting to receive?
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