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September 27, 2011 17:00
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Backbone.js model calling jsonp
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// backbone.js continues to impress, I needed to get data from a jsonp api | |
// I really wanted to do this the "right" backbone.js way and create a model and call fetch. | |
// But the default backbone synch is not jsonp | |
// Turns out you can override a synch on a per model basis (thanks stackoverflow) | |
// whats nice is backbone.js continue to work as expected with the override | |
// here's a snippet (some changes to protect our privacy). An improvement could be to create a jsonp model class which MyModel inherits | |
// the synch function is most important below, that's what tells backbone it's jsonp | |
MyModel = Backbone.Model.extend({ | |
url: function() { | |
return '/yourJsonpUrlhere'; | |
}, | |
// override backbone synch to force a jsonp call | |
sync: function(method, model, options) { | |
// Default JSON-request options. | |
var params = _.extend({ | |
type: 'GET', | |
dataType: 'jsonp', | |
url: model.url(), | |
jsonp: "jsonpCallback", // the api requires the jsonp callback name to be this exact name | |
processData: false | |
}, options); | |
// Make the request. | |
return $.ajax(params); | |
}, | |
parse: function(response) { | |
// parse can be invoked for fetch and save, in case of save it can be undefined so check before using | |
if (response) { | |
if (response.success ) { | |
// here you write code to parse the model data returned and return it as a js object | |
// of attributeName: attributeValue | |
return {name: response.name}; // just an example, | |
} | |
} | |
} | |
}); |
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Thanks for these posts. I also found that mdigital's version worked for me but parse was never called in the code above.