ember.js RESTAdapter Request

I made several models (below are 2 of them: category and product) each one of them gets the data using REST Requests.

var Category =  DS.Model.extend({
  name: DS.attr('string'),
  img: DS.attr('string'),
  url: DS.attr('string'),
  cnt: DS.attr('number'),

  parent_id: DS.belongsTo('category', {
//    inverse: 'children'
  }),
  children: DS.attr()
});

var Product = DS.Model.extend({
  cat_id: DS.belongsTo('category'),
  products: DS.attr()
});

router.js

Router.map(function() {
  this.route('categories');
  this.resource('category', { path: 'categories/:category_id' }, function() { });
});

routes/categories.js

export default Ember.Route.extend({
  model: function() {
    var store = this.store;
    return Ember.ArrayProxy.create({
      categories: store.find('category')
    });
  },
  setupController: function(controller, model) {
    controller.set('categories', model.categories);
  }
});

routes/category.js

export default Ember.Route.extend({
  model: function(params) {
    var store = this.store;
    var param_id = params.category_id;
    var category = store.find('category', param_id);

    return Ember.RSVP.hash({
      category: category,
      filters: store.find('catfilter', param_id),
      products: store.find('product', param_id)
    });
  },
  setupController: function(controller, models) {
    controller.set('category', models.category);
    controller.set('filters', models.filters);
    controller.set('products', models.products);
  }
});

templates/categories.hbs

{{#each category in categories}}
   <li class="ProductGrid-item">
      {{#link-to 'category' category class=""}}
          <div class="CategoryNav-title">{{category.name}}</div>
              <img {{bind-attr src="category.img" alt="category.name"}} width="140" height="140">
          </div>
      {{/link-to}}
   </li>
{{/each}}

The problem is that when I go to dev:4200/categories it makes the request to api/categories and loads the data into the controller and it's available in the template. When I click on the link generated with {{#link-to 'category' category class=""}} from the categories.hbs template it takes me to dev:4200/category/1 but it doesn't make a new request to api/categories/1 or to api/products/1. If I hit F5 (refresh the page) it will make both requests and I can use the json response in the CategoryController which loads category.hbs template.

Also the data loaded from categories I use it in the menu (it's on every page) so is there a way to have it loaded on the first url requested like dev:4200/ and if the user then goes to /categories the controller can fetch the data already available without making a new request for the json?

I'm using ember-cli manually updated with:

DEBUG: Ember      : 1.9.0
vendor.js:17480 DEBUG: Ember Data : 1.0.0-beta.12
vendor.js:17480 DEBUG: Handlebars : 2.0.0
vendor.js:17480 DEBUG: jQuery     : 1.11.2