Refactor ajax request

app/utils/ajax-request.js

@@ -0,0 +1,13 @@
+export default function ajaxRequest(url, options) {
+  return new Ember.RSVP.Promise(function(resolve, reject) {
+    options = options || {};
+    options.url = url;
+    options.success = function(data) {
+      resolve(data);
+    };
+    options.error = function(jqXHR, status, error) {
+      reject(jqXHR, status, error);
+    };
+    Ember.$.ajax(options);
+  });
+}