Eliminating current_user activity from records being returned through a complex association

I have built a Ruby on Rails application (Rails 2.3.9) that allows users to track workouts. After a workout is created other users can comment on that workout. I am now working on the Dashboard index view to display recent activity.

In this particular section I am trying to display comments from all on workouts that current_user has commented on. I am successfully pulling those comments, ordering them, and limiting the output through the below code.

I am now trying to exclude comments from current user. Here is the code:

/views/dashboard/index.html.erb

  <% unless current_user.comment_stream.blank? %>
      <h3>Recent Comments from WODs you commented on</h3>
        <% current_user.comment_stream[0,10].each do |comment| %>
          <p>
             Comment from <%= link_to (comment.user.username), comment.user %> 
             <%= time_ago_in_words(comment.created_at) %> ago on Workout: 
             <%= link_to (comment.workout.title), comment.workout %>
          </p>
        <% end %>
  <% end %>

User.rb

  def workouts_on_which_i_commented
    comments.map{|x|x.workout}.uniq
  end

  def comment_stream
   workouts_on_which_i_commented.map do |w|
     w.comments
   end.flatten.sort{|x,y| y.created_at <=> x.created_at}
  end

Example of Problem:

Here is an example of what happens with this code:

User A creates a workout and User B comments on it. Then User C and User D also comment on User A's workout. In User开发者_Python百科 B's dashboard view, I want him to see comments from User C and User D in the activity stream...but I don't want him to see his own comments.

I could simply use a <% unless comment.user_id == current_user.id %> but that messes up the number of records being displayed as those are fished prior to the exclusion line.

In comment_stream, you can add filter out the comments you posted

def comment_stream
  workouts_on_which_i_commented.map do |w|
    w.comments
  end.flatten.reject{|c| c.user_id == current_user.id}.sort{|x,y| y.created_at <=> x.created_at}
end