更新出错

app/controllers/hacks_controller.rb

@@ -69,11 +69,10 @@ class HacksController < ApplicationController
         # 新建
         @hack.hack_sets.create!(hack_sets_params)
         # 更新代码
-        hack_codes = @hack.hack_codes.new(hack_code_params)
         if params[:hack_codes][:code] != @hack.code
-          hack_codes.modify_time = Time.now
+          hack_code_params = hack_code_params.merge(modify_time: Time.now)
         end
-        hack_codes.save!
+        @hack.hack_codes.first.update_attributes!(hack_code_params)
       end
       render_ok
     rescue Exception => e