Tags should be an array

models/comment.js

@@ -9,11 +9,6 @@ const STATUSES = [
   null
 ];
 
-const TAGS = [
-  'STAFF',
-  null
-];
-
 /**
  * The Mongo schema for a Comment Status.
  * @type {Schema}
@@ -54,10 +49,11 @@ const CommentSchema = new Schema({
   author_id: String,
   status_history: [StatusSchema],
   status: {type: String, default: null},
-  tag: {
-    type: String,
-    enum: TAGS,
-  },
+  tags: [{
+    name: String,
+    assigned_by: String,
+    created_at: Date
+  }],
   parent_id: String
 }, {
   timestamps: {