Override fetch method from a backbone collection Reference : http://stackoverflow.com/questions/13358477/override-backbones-collection-fetch

OverrideBackboneCollectionFetch.js

var MyCollection = Backbone.Collection.extend({

        //custom methods

        fetch: function(options) {

            //do specific pre-processing 

            //Call Backbone's fetch
            return Backbone.Collection.prototype.fetch.call(this, options);
      }
}