diff --git a/app/controllers/hacks_controller.rb b/app/controllers/hacks_controller.rb
index e5ca0dc1d..3eaac0648 100644
--- a/app/controllers/hacks_controller.rb
+++ b/app/controllers/hacks_controller.rb
@@ -44,12 +44,13 @@ class HacksController < ApplicationController
     begin
       logger.info("##########{hack_params}")
       hack = Hack.new(hack_params)
+      hack.user_id = current_user.id
+      hack.identifier = generate_identifier Hack, 8
       ActiveRecord::Base.transaction do
-        hack.user_id = current_user.id
-        hack.identifier = generate_identifier Hack, 8
         hack.save!
         # 创建测试集与代码
         hack.hack_sets.create!(hack_sets_params)
+        # 新建知识点
         hack_codes = hack.hack_codes.new(hack_code_params)
         hack_codes.modify_time = Time.now
         hack_codes.save!