修复(#85): 按数量匹配订阅促销价

Co-authored-by: multica-agent <github@multica.ai>

queue/logic/order/activateOrderLogic.go

@@ -149,7 +149,14 @@ func (l *ActivateOrderLogic) ProcessTask(ctx context.Context, task *asynq.Task)
 		return err
 	}
 
-	l.recordPromoUsage(ctx, orderInfo)
+	if err = l.recordPromoUsage(ctx, orderInfo); err != nil {
+		logger.WithContext(ctx).Error("[ActivateOrderLogic] 促销使用记录写入失败，将重试",
+			logger.Field("order_no", orderInfo.OrderNo),
+			logger.Field("promo_rule_id", orderInfo.PromoRuleId),
+			logger.Field("error", err.Error()),
+		)
+		return err
+	}
 	l.finalizeCouponAndOrder(ctx, orderInfo)
 
 	commonLogic.SubscriptionTraceInfo(logger.WithContext(ctx), commonLogic.SubscriptionTraceFlowOrder, "activation_finished",
@@ -159,9 +166,9 @@ func (l *ActivateOrderLogic) ProcessTask(ctx context.Context, task *asynq.Task)
 	return nil
 }
 
-func (l *ActivateOrderLogic) recordPromoUsage(ctx context.Context, orderInfo *order.Order) {
+func (l *ActivateOrderLogic) recordPromoUsage(ctx context.Context, orderInfo *order.Order) error {
 	if orderInfo == nil || orderInfo.PromoRuleId <= 0 || orderInfo.Quantity <= 0 || orderInfo.SubscribeId <= 0 || orderInfo.OrderNo == "" {
-		return
+		return nil
 	}
 
 	promoPrice := int64(0)
@@ -169,10 +176,10 @@ func (l *ActivateOrderLogic) recordPromoUsage(ctx context.Context, orderInfo *or
 		promoPrice = (orderInfo.Price - orderInfo.PromoDiscount) / orderInfo.Quantity
 	}
 	if promoPrice <= 0 {
-		return
+		return nil
 	}
 
-	err := l.svc.DB.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+	return l.svc.DB.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		var count int64
 		if e := tx.Model(&promo.Usage{}).Where("order_no = ?", orderInfo.OrderNo).Count(&count).Error; e != nil {
 			return e
@@ -188,13 +195,6 @@ func (l *ActivateOrderLogic) recordPromoUsage(ctx context.Context, orderInfo *or
 			PromoPrice:  promoPrice,
 		}, tx)
 	})
-	if err != nil {
-		logger.WithContext(ctx).Error("Insert promo usage failed",
-			logger.Field("error", err.Error()),
-			logger.Field("order_no", orderInfo.OrderNo),
-			logger.Field("promo_rule_id", orderInfo.PromoRuleId),
-		)
-	}
 }
 
 // parsePayload unMarshals the task payload into a structured format