添加按类别创建促销

Change-Id: If9a0d78bfd14030782c24a0fa07b66cddea69d1e
diff --git a/src/main/java/com/example/myproject/dto/PromotionCreateDTO.java b/src/main/java/com/example/myproject/dto/PromotionCreateDTO.java
index 211979b..ca710d0 100644
--- a/src/main/java/com/example/myproject/dto/PromotionCreateDTO.java
+++ b/src/main/java/com/example/myproject/dto/PromotionCreateDTO.java
@@ -25,7 +25,7 @@
     @Max(value = 100, message = "折扣比例不能大于100")
     private double discountPercentage;
     
-    @NotEmpty(message = "适用种子列表不能为空")
+
     private List<Long> applicableTorrentIds;
     
     @AssertTrue(message = "结束时间必须晚于开始时间")