FIX: Navigating to a user's admin page would not populate

`availableGroups`

app/assets/javascripts/admin/controllers/admin_user_controller.js

@@ -1,14 +1,3 @@
-/**
-  The top-level controller for user pages in admin.
-  Ember assertion says that this class needs to be defined even if it's empty.
-
-  @class AdminUserController
-  @extends Discourse.ObjectController
-  @namespace Discourse
-  @module Discourse
-**/
-Discourse.AdminUserController = Discourse.ObjectController.extend({});
-
 /**
   A controller related to viewing a user in the admin section
 
@@ -19,6 +8,8 @@ Discourse.AdminUserController = Discourse.ObjectController.extend({});
 **/
 Discourse.AdminUserIndexController = Discourse.ObjectController.extend({
   editingTitle: false,
+  originalPrimaryGroupId: null,
+  availableGroups: null,
 
   showApproval: Discourse.computed.setting('must_approve_users'),
   showBadges: Discourse.computed.setting('enable_badges'),

app/assets/javascripts/admin/routes/admin_user_route.js

@@ -1,13 +1,4 @@
-/**
-  Handles routes related to users in the admin section.
-
-  @class AdminUserRoute
-  @extends Discourse.Route
-  @namespace Discourse
-  @module Discourse
-**/
 Discourse.AdminUserRoute = Discourse.Route.extend({
-
   serialize: function(model) {
     return { username: model.get('username').toLowerCase() };
   },
@@ -21,22 +12,30 @@ Discourse.AdminUserRoute = Discourse.Route.extend({
   },
 
   afterModel: function(adminUser) {
-    var controller = this.controllerFor('adminUser');
-
-    Discourse.Group.findAll().then(function(groups){
-      controller.set("availableGroups", groups.filterBy("automatic", false));
-    }.bind(this));
-
-
     return adminUser.loadDetails().then(function () {
       adminUser.setOriginalTrustLevel();
-      controller.set('model', adminUser);
+      return adminUser;
+    });
+  }
+});
+
+Discourse.AdminUserIndexRoute = Discourse.Route.extend({
+  model: function() {
+    return this.modelFor('adminUser');
+  },
+
+  afterModel: function(model) {
+    var self = this;
+    return Discourse.Group.findAll().then(function(groups){
+      self._availableGroups = groups.filterBy('automatic', false);
+      return model;
     });
   },
 
   setupController: function(controller, model) {
     controller.setProperties({
       originalPrimaryGroupId: model.get('primary_group_id'),
+      availableGroups: this._availableGroups,
       model: model
     });
   },
@@ -47,11 +46,4 @@ Discourse.AdminUserRoute = Discourse.Route.extend({
       this.controllerFor('modal').set('modalClass', 'suspend-user-modal');
     }
   }
-
-});
-
-Discourse.AdminUserIndexRoute = Discourse.Route.extend({
-  setupController: function(c) {
-    c.set('model', this.controllerFor('adminUser').get('model'));
-  }
 });

app/assets/javascripts/discourse/routes/application.js.es6

@@ -9,6 +9,7 @@ var ApplicationRoute = Em.Route.extend({
       }
 
       var exceptionController = this.controllerFor('exception');
+      Em.warn(err);
       exceptionController.setProperties({ lastTransition: transition, thrown: err });
 
       this.intermediateTransitionTo('exception');