gistfile1.rb

  def events_for_me limit = 10
    essay_ids = essays.all(:select => :id).map(&:id)
    recording_ids = recordings.all(:select => :id).map(&:id)
    essay_sql = "(resource_id IN (#{essay_ids.join}) AND resource_type= 'Essay')"
    recording_sql =  "(resource_id IN (#{recording_ids.join}) AND resource_type= 'Recording')"
    my_comments = essays.ids.blank? ?  [] : Comment.all(:conditions => "#{essay_sql} OR #{recording_sql}") 
    my_corrections = essays.ids.blank? ?  [] : Correction.all(:conditions => "essay_id IN (#{essays_ids.join})")
    (my_comments + my_corrections).sort_by{|x| x.created_at}.reverse[0...limit]
  end