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POBackbone custom method
 

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  1. POBackbone custom method
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    <p>I'm building a shopping cart with Backbone and I'm having a hard time determining how to structure the interaction with the server. When the user hits the checkout (and after the validation) I need to:</p> <ol> <li><p>Save the Order using order.save() - Because the order was created on the client this will hit the route on the server and give me back an ID. I need the ID before I process the order.</p></li> <li><p>On success I call a custom method on the Order which hits the server again which does a request to the card processing service.</p></li> <li><p>I either report the err to the client and let him modify and retry or I update the order record and create a Payment record in the database.</p></li> </ol> <p>Here is my processOrder method in the Order Model:</p> <pre><code>processOrder: function() { var order = this.toJSON(); $.ajax({ url: '/api/order/process', type: 'POST', data: order, dataType: 'json', success: function(res) { console.log(res); }, error: function(err) { //show error message console.log('error: ' + JSON.stringify(err)); } }); } </code></pre> <p>This is where the form is submitted in my view</p> <pre><code>saveOrder: function() { ... var order = this.order; order.set(this.frmJSON); order.save(this.frmJSON, { success: function(res) { console.log('order saved...'); order.processOrder(); }, error: function(err) { console.log(JSON.stringify(err)); } }); } </code></pre> <p>The order is saved on the server and the Order gets an ID inserted into it. When I call processOrder it works until it gets to the ajax call. It never hits the server and the browser hangs up with no error. Is there a better way to structure these steps?</p>
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    1. USjabbermonkey
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    1. COSo you create the `id` on the server, and return `id` to the client - just to send to it back again? Why not process the order on the initial `save` and then return the `id`.
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      1. POBackbone custom method
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    2. COThat's what I was initially doing but if I create the DB record and then try to process the credit card it will return an error and the client won't have the ID leaving an orphaned DB record. I couldn't figure out a good way to return the ID (trigger the save success) and return the credit card error. I'm also sending an email (or fax) upon success so there is a lot that could go wrong.
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      1. USjabbermonkey
 

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