diff --git a/app/models/hack_set.rb b/app/models/hack_set.rb
index 6afe05663..4f355181d 100644
--- a/app/models/hack_set.rb
+++ b/app/models/hack_set.rb
@@ -1,6 +1,6 @@
 class HackSet < ApplicationRecord
-  #validates :input, presence: { message: "测试集输入不能为空" }
-  validates :output, presence: { message: "测试集输出不能为空" }
+  validates :input, allow_nil:false, message: "测试集输入不能为空"
+  validates :output, allow_nil: false, message: "测试集输出不能为空"
   validates_uniqueness_of :input, scope: [:hack_id, :input], message: "多个测试集的输入不能相同"
   # 编程题测试集
   belongs_to :hack