return username for display

models/comment.rb

@@ -47,6 +47,7 @@ class Comment < Content
       as_document.slice(*%w[body course_id endorsed anonymous created_at updated_at at_position_list])
                   .merge("id" => _id)
                   .merge("user_id" => author.id)
+                  .merge("username" => author.username)
                   .merge("depth" => depth)
                   .merge("thread_id" => comment_thread.id)
                   .merge("votes" => votes.slice(*%w[count up_count down_count point]))

models/comment_thread.rb

@@ -80,6 +80,7 @@ class CommentThread < Content
     doc = as_document.slice(*%w[title body course_id anonymous commentable_id created_at updated_at at_position_list])
                       .merge("id" => _id)
                       .merge("user_id" => author.id)
+                      .merge("username" => author.username)
                       .merge("votes" => votes.slice(*%w[count up_count down_count point]))
                       .merge("tags" => tags_array)
 

models/observers/at_user_observer.rb

@@ -30,6 +30,7 @@ class AtUserObserver < Mongoid::Observer
           content_id: content.id,
           content_type: content_type,
           thread_title: content_type == :thread ? content.title : content.comment_thread.title,
+          actor_username: (content.author.username if not content.anonymous),
         }
       )
       notification.actor = content.author if not content.anonymous

models/observers/post_reply_observer.rb

@@ -14,6 +14,7 @@ class PostReplyObserver < Mongoid::Observer
           thread_title: comment.comment_thread.title,
           comment_id: comment.id,
           commentable_id: comment.comment_thread.commentable_id,
+          actor_username: (comment.author.username if not comment.anonymous),
         },
       )
       notification.actor = comment.author if not comment.anonymous

models/observers/post_topic_observer.rb

@@ -14,6 +14,7 @@ class PostTopicObserver < Mongoid::Observer
           #commentable_type: commentable.commentable_type,
           thread_id: comment_thread.id,
           thread_title: comment_thread.title,
+          actor_username: (comment_thread.author.username if not comment_thread.anonymous),
         },
       )
       notification.actor = comment_thread.author if not comment_thread.anonymous