设置了评分的竞赛作品提交有问题

app/models/contestant_work.rb

@@ -26,6 +26,8 @@ class ContestantWork < ActiveRecord::Base
   end
 
   def set_work_score
-    set_final_score self.work,self
+    if self.id
+      set_final_score self.work,self
+    end
   end
 end