课堂学生进作品列表报错

app/models/graduation_task.rb

@@ -37,7 +37,7 @@ class GraduationTask < ApplicationRecord
 
 
   def user_work user_id
-    work = self.graduation_works.find_by(user_id: user_id)
+    work = self.graduation_works.find_by(user_id: user_id) || GraduationWork.create!(graduation_task_id: id, user_id: user_id)
   end
 
   def task_type_name

app/models/homework_common.rb

@@ -102,7 +102,7 @@ class HomeworkCommon < ApplicationRecord
   end
 
   def user_work user_id
-    work = self.student_works.find_by_user_id(user_id)
+    work = self.student_works.find_by_user_id(user_id) || StudentWork.create!(homework_common_id: id, user_id: user_id)
   end
 
   # 是否在补交阶段内