fix error

app/controllers/personal_journals_controller.rb

@@ -144,7 +144,7 @@ class PersonalJournalsController < ApplicationController
 
   def index_by_author(journal_papers)
     journal_papers_total_pages = journal_papers.total_pages
-    journal_papers_list = journal_papers.group_by{|jp| jp.member_profile.name rescue jp.authors}.collect do |name, jps|
+    journal_papers_list = journal_papers.group_by{|jp| jp.member_profiles.collect{|v| v.name}.join(', ') rescue jp.authors}.collect do |name, jps|
       jps_data = jps.collect do |jp|
         {'title' => jp.create_link_tag_for_title}
       end

app/models/journal_paper.rb

@@ -211,6 +211,19 @@ class JournalPaper
     plugin_datas
   end
 
+  def member_profile(only_one=true)
+    tmp = super()
+    only_one ? tmp.first : tmp
+  end
+
+  def member_profiles
+    member_profile(false)    
+  end
+
+  def member_profile=(mp)
+    super(mp.class != MemberProfile ? mp : [mp])
+  end
+
   def get_plugin_field_data(field)
     case field
     when "level_type"