Default path problem in backbone.js

I'm trying to create my first BB app. It's going ok but I have a problem. My router looks like this:

var PlayersAppRouter = Backbone.Router.extend({
    routes: {
        '': 'index',
    },

    initialize: function () {
        this.model = new PlayersAppModel({});
        this.view = new PlayersAppView({model: this.model});
    },

    index: function () {
        alert('It works'); //<-- It doesn't
    },
});

And later in my code I have:

$(function () {
        window.app = new PlayersAppRouter;
        Backbone.history.start({pushState: true});

        app开发者_如何转开发.model.players.reset(<?php require('players.php'); ?>); //<-- players.php loads a bunch of JSON data.
});

Now, why doesn't the index action of the router fire? Am I doing something wrong? Are there any other problems with this code?

The full app can be found here: http://development.zeta-two.com/development/f14/

---

Get rid of your pushState:true at it works

http://fiddle.jshell.net/r5TEk/9/show/

There maybe a bug with pushSate. See here

https://github.com/documentcloud/backbone/issues/451

---

Using a regular expression, add a route manually in the initialize function.

...
initialize: function() {
    this.route(/\/?/, 'index', this.index);
},
index: function() {
    alert('It works!');
},
...

This works fine with {pushState: true}.

http://jsfiddle.net/sergio/WpKPP/

http://jsfiddle.net/sergio/WpKPP/show

---

Can't remember where I read it, buy I find you have to call initialize on the router. This is my working example, fired inside a jquery.ready function.

MainView = new View.main();
appRouter = new Router();
// set up single page app with push state
Backbone.history.start({pushState: true});
appRouter.initialize();

Routes config.

routes: {
    "": "index"
}

Using @serg.io answer this.route(/\/?/, 'index', this.index); caused it override my other routes.