EmberJS: How to trigger a parent model refresh when transitioning between children?

This is my router:

  this.route('bundle', { path: 'bundles/:slug', resetNamespace: true }, function () {
      this.route('pricing');
  });

So there are two child routes: index and pricing.

Index is a listing of all the products in the bundle, while pricing is where you can purchase the bundle. When somebody purchases a bundle, the pricing page displays a link-to:

{{#link-to 'bundle' bundle.slug}}View Bundle{{/link-to}}`

This hits the model hook of bundle.index, but not of the parent route bundle. I need to refresh the parent route's model after a purchase though because there are server-side changes to the model that need to be displayed in the front-end.

How can I make that happen?