fixed empty db bug

db/seeds.rb

@@ -1,6 +1,11 @@
 require 'factory_girl'
 require 'faker'
 
+CoAuthorRelation.destroy_all
+CoAuthor.destroy_all
+JournalLevelType.destroy_all
+WritingJournalFile.destroy_all
+WritingJournal.destroy_all
 #Dir[Rails.root.join("spec/factories/*.rb")].each {|f| require f}
 
 10.times do
@@ -18,3 +23,5 @@ end
 50.times do
   FactoryGirl.create(:co_author_candidate)
 end
+
+puts "Success!"