How to call parent backbone sync method

Question

In my application I override Backbone.sync as follows:

Backbone.sync = function(method, model, options){ 
    //Some custom code

    //THIS FAILS.
    Backbone.prototype.sync.call(this, method, model, options); 
}}

My question is, how do I call the original sync method? Do I need to use this.sync instead?

Answer 1

From what I understand, Backbone.sync checks to see if there is a locally defined version of sync and calls that before calling the global Backbone.sync :

(this.sync || Backbone.sync)

So, given that your Model is something like TestModel. I think you can do something like this (forgive, me this might not be the correct syntax, javascript is far from my specialty):

var TestModel = Backbone.Model.extend({ 

    "sync": function(method, model, options) { 
        //Some custom code

        Backbone.sync(method, model, options); 
    }
});

This is what I've gathered from here and here

Answer 2

Try something like this, might not be the best solutions but it works:

var parentSyncMethod = Backbone.sync; //save parent method, the override
Backbone.sync = function() {
    // Your code here.
    var parentSyncMethod.apply(Backbone, arguments);
};

Hope it helps in some way

Answer 3

var TestModel = Backbone.Model.extend({ 
    sync: function(method, model, options){  
        // some code here
        return Backbone.sync(method, model, options); 
    }
});