Trigger parent redirection after redirecting from child with emberJS

Assuming I have a route that contains another route:

this.route('fields', function () {
  this.route('details', { path: '/:field_name' });
});

Parent route:

redirect(model, transition) {
  alert(transition.to.name);
},

Child route:

redirect(model, transition) {
  if (something) this.transitionTo('fields');
},

It should alert twice when I reach the child route (since there is a redirection to parent route). It only alert once (before the redirection).

How can I re-trigger the parent redirect action?