Fetch category_id param directly

Author: locks

app/routes/category/index.js

@@ -7,7 +7,7 @@ export default Ember.Route.extend({
     },
 
     model(params) {
-        params.category = this.modelFor('category').id;
+        params.category = this.paramsFor('category').category_id;
         return this.store.query('crate', params);
     },