diff --git a/static/js/app/lib/backbone.dss.model.js b/static/js/app/lib/backbone.dss.model.js
index 910dafd..29f3430 100755
--- a/static/js/app/lib/backbone.dss.model.js
+++ b/static/js/app/lib/backbone.dss.model.js
@@ -1,6 +1,6 @@
-define(['backbone'], function (Backbone) {
+define(['backbone', 'backbone.relational'], function (Backbone) {
 
-    var TastypieModel = Backbone.Model.extend({
+    var TastypieModel = Backbone.RelationalModel.extend({
         base_url: function () {
             var temp_url = Backbone.Model.prototype.url.call(this);
             return (temp_url.charAt(temp_url.length - 1) == '/' ? temp_url : temp_url + '/');
diff --git a/static/js/app/views/mix/mixDetailView.coffee b/static/js/app/views/mix/mixDetailView.coffee
index 1d00c1e..094a461 100755
--- a/static/js/app/views/mix/mixDetailView.coffee
+++ b/static/js/app/views/mix/mixDetailView.coffee
@@ -24,7 +24,7 @@ define ['marionette',
 
 
         addComment: ->
-          commen = new
+          comment = "123"
 
         onRender: ->
             view = new MixItemView({tagName: "div", className: "mix-listing audio-listing-single", model: @model})
diff --git a/static/js/app/views/mix/mixDetailView.js b/static/js/app/views/mix/mixDetailView.js
index 277a596..3dd1791 100644
--- a/static/js/app/views/mix/mixDetailView.js
+++ b/static/js/app/views/mix/mixDetailView.js
@@ -28,7 +28,10 @@
         "click #btn-add-comment": "addComment"
       };
 
-      MixDetailView.prototype.addComment = function() {};
+      MixDetailView.prototype.addComment = function() {
+        var comment;
+        return comment = "123";
+      };
 
       MixDetailView.prototype.onRender = function() {
         var view;
diff --git a/static/js/main.js b/static/js/main.js
index d9278c2..60c6b68 100644
--- a/static/js/main.js
+++ b/static/js/main.js
@@ -6,6 +6,7 @@ requirejs.config({
         site: 'app/site',
         jquery: 'lib/jquery',
         backbone: 'lib/backbone',
+        'backbone.relational': 'lib/backbone.relational',
         'backbone.syphon': 'lib/backbone.syphon',
         marionette: 'lib/backbone.marionette',
         bootstrap: 'lib/bootstrap',