Proper way to sort a backbone.js collection on the fly

Question

I can successfully do this:

App.SomeCollection = Backbone.Collection.extend({
  comparator: function( collection ){
    return( collection.get( \'lastName\' ) );         


        

Answer 1

This is what I ended up doing for the app I'm currently working on. In my collection I have:

comparator: function(model) {
    var methodName = applicationStateModel.get("comparatorMethod"),
        method = this[methodName];
    if (typeof(method === "function")) {
        return method.call(null, model);
    }
}

Now I can add few different methods to my collection: fooSort(), barSort(), and bazSort().
I want fooSort to be the default so I set that in my state model like so:

var ApplicationState = Backbone.Model.extend({
    defaults: {              
        comparatorMethod: "fooSort"
    }
});

Now all I have to do is write a function in my view that updates the value of "comparatorMethod" depending upon what the user clicks. I set the collection to listen to those changes and do sort(), and I set the view to listen for sort events and do render().

BAZINGA!!!!