fixed author sample data generation and model method

vendor/built_in_modules/personal_conference/app/models/writing_conference.rb

@@ -42,6 +42,7 @@ class WritingConference
   validates :paper_title, :at_least_one => true
   before_validation :add_http
   after_save :save_writing_conference_files
+  before_save :update_co_author
   validates :url, :format => /^(http|https):\/\/(([a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5})|((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))(:[0-9]{1,5})?(\/.*)?/i, :unless => Proc.new{self.url.blank?}
 
   attr_reader :author_tokens
@@ -63,6 +64,19 @@ class WritingConference
     self.conference_co_author_ids = authors_ids
   end
 
+  def update_co_author
+    if new_record?
+      current_user = self.create_user_id
+    else
+      current_user = self.update_user_id
+    end
+
+    self.conference_co_author_ids.each do |id|
+      co_author = ConferenceCoAuthor.find(id)
+      co_author.update_attribute(:name_id, current_user)
+    end
+  end
+
   def self.search( category_id = nil )
     if category_id.to_s.size > 0
       find(:all, :conditions => {writing_conference_category_id: category_id}).desc( :is_top, :title )