diff --git a/app/controllers/trustie_hacks_controller.rb b/app/controllers/trustie_hacks_controller.rb
index 22a7a2976..0ae56383c 100644
--- a/app/controllers/trustie_hacks_controller.rb
+++ b/app/controllers/trustie_hacks_controller.rb
@@ -49,10 +49,10 @@ class TrustieHacksController < ApplicationController
 
   # 报名入口
   def entry
-    if @hack.hack_users.exists?(user_id: current_user)
+    if @hack.hack_users.exists?(user_id: current_user.id)
       render_error('已经报名，请勿重复操作')
     else
-      @hack.hack_users.create(user_id: current_user)
+      @hack.hack_users.create(user_id: current_user.id)
       render_ok
     end
   end