Ember.js transition to a route with dynamic segment

I have an index page which has an action that creates a record. Then I want to transition to that record, the route has a dynamic segment. I got it working but in a horrible way assigning that = this. I think there is a better way to do this.

import Ember from 'ember';

export default Ember.Controller.extend({
    actions: {
        submitHandle: function() {
            var newCard = this.store.createRecord('card', {
                handle: this.get('handle')
            }),

            that = this;

            newCard.save().then(function(savedCard) {
                that.transitionToRoute('card.build', savedCard.get('id'));
            })
        }
    }
});