code: function(classObject) {
    var className = classObject.toString(),
        parts = className.split("."),
        last = parts[parts.length - 1];
  
    return Ember.String.underscore(last) + "_id";
  }
docs: The Ember Routable mixin assumes the existance of a simple routing shim that supports the following three behaviors:  * .getURL() - this is called when the page loads * .setURL(newURL) - this is called from within the state manager when the state changes to a routable state * .onURLChange(callback) - this happens when the user presses the back or forward button