分组作业选用题库附件找不到

app/controllers/question_banks_controller.rb

@@ -148,6 +148,7 @@ class QuestionBanksController < ApplicationController
       end
       # 附件
       logger.info("######attachments: #{homework.attachments.count}")
+      if new_homework.save!
         homework.attachments.try(:each) do |attachment|
           att = attachment.copy
           att.container_id = nil
@@ -158,8 +159,6 @@ class QuestionBanksController < ApplicationController
           new_homework.attachments << att
         end
         logger.info("######new_homework.attachments: #{new_homework.attachments.count}")
-
-      if new_homework.save
         new_homework_detail_manual.save if new_homework_detail_manual
         new_homework.homework_detail_group.save if new_homework.homework_detail_group
         HomeworksService.new.create_works_list(new_homework, course)