Models.Wall = Models.Value.extend({ classType: "MODELS.WALL", postInitialize: function() { }, getAdditionalJSONObject: function() { var toReturn = { iscommentable: this.get("iscommentable"), posts: JSON.stringify(this.get("posts")) }; return toReturn; } }); Models.WallCollection = Models.BaseCollection.extend({ classType: "MODELS.WALLCOLLECTION", model: Models.Wall });