route-url.js

import Ember from 'ember';

const { Helper, inject, get } = Ember;

/* stolen from Ember.LinkComponent */

export default Helper.extend({
  _routing: inject.service('-routing'),
  compute([qualifiedRouteName, ...models], queryParams) {
    let routing = get(this, '_routing');
    return routing.generateURL(qualifiedRouteName, models, queryParams);
  }
});