eager load author and profile for comments

app/models/comment.rb

@@ -32,6 +32,8 @@ class Comment < ActiveRecord::Base
 
   serialize :youtube_titles, Hash
 
+  scope :including_author, includes(:author => :profile)
+
   before_save do
     self.text.strip! unless self.text.nil?
   end

app/views/comments/_comments.html.haml

@@ -9,9 +9,9 @@
 
   %ul.comments{:class => ('loaded' if post.comments.size <= 3)}
     -if post.comments.size > 3 && !comments_expanded && ! all_comments?
-      = render :partial => 'comments/comment', :collection => post.comments.last(3), :locals => {:post => post}
+      = render :partial => 'comments/comment', :collection => post.comments.last(3).including_author, :locals => {:post => post}
     -else
-      = render :partial => 'comments/comment', :collection => post.comments, :locals => {:post => post}
+      = render :partial => 'comments/comment', :collection => post.comments.including_author, :locals => {:post => post}
 
   - unless commenting_disabled?(post)
     .new_comment_form_wrapper{:class => comment_form_wrapper_class(post)}