From 2dc1387b59786d66c16de0c70157df60bd348cc9 Mon Sep 17 00:00:00 2001
From: feitianbubu <feitianbubu@qq.com>
Date: Thu, 18 Jun 2026 23:06:01 +0800
Subject: [PATCH] fix(promo): allow clearing promo code expiry on edit

---
 backend/internal/handler/admin/promo_handler.go | 2 +-
 backend/internal/service/promo_service.go       | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/backend/internal/handler/admin/promo_handler.go b/backend/internal/handler/admin/promo_handler.go
index 77d5f17165..34a44a81f1 100644
--- a/backend/internal/handler/admin/promo_handler.go
+++ b/backend/internal/handler/admin/promo_handler.go
@@ -148,7 +148,7 @@ func (h *PromoHandler) Update(c *gin.Context) {
 	if req.ExpiresAt != nil {
 		if *req.ExpiresAt == 0 {
 			// 0 表示清除过期时间
-			input.ExpiresAt = nil
+			input.ExpiresAt = &time.Time{}
 		} else {
 			t := time.Unix(*req.ExpiresAt, 0)
 			input.ExpiresAt = &t
diff --git a/backend/internal/service/promo_service.go b/backend/internal/service/promo_service.go
index 5ff63bdc50..b85f7e4808 100644
--- a/backend/internal/service/promo_service.go
+++ b/backend/internal/service/promo_service.go
@@ -236,6 +236,9 @@ func (s *PromoService) Update(ctx context.Context, id int64, input *UpdatePromoC
 		promoCode.Status = *input.Status
 	}
 	if input.ExpiresAt != nil {
+		if input.ExpiresAt.IsZero() {
+			input.ExpiresAt = nil
+		}
 		promoCode.ExpiresAt = input.ExpiresAt
 	}
 	if input.Notes != nil {