f

app/main/api/internal/logic/admin_order/adminrefundorderlogic.go

@@ -82,7 +82,8 @@ func (l *AdminRefundOrderLogic) handleAlipayRefund(order *model.Order, req *type
 		orderPayTime = &order.PayTime.Time
 	}
 	refundNo := l.generateRefundNo(order.OrderNo)
-	refundResp, err := l.svcCtx.AlipayService.AliRefund(l.ctx, order.OrderNo, req.RefundAmount, orderPayTime, refundNo)
+	// 按订单记录的商户号 payment_merchant 选择支付宝商户；老订单未写入时由 AliRefund 内部按时间区间兜底。
+	refundResp, err := l.svcCtx.AlipayService.AliRefund(l.ctx, order.PaymentMerchant, order.OrderNo, req.RefundAmount, orderPayTime, refundNo)
 	if err != nil {
 		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "AdminRefundOrder, 支付宝退款失败 err: %v", err)
 	}
@@ -146,6 +147,7 @@ func (l *AdminRefundOrderLogic) createRefundRecordAndUpdateOrder(order *model.Or
 			OrderId:          order.Id,
 			UserId:           order.UserId,
 			ProductId:        order.ProductId,
+			PaymentMerchant:  order.PaymentMerchant,
 			RefundAmount:     req.RefundAmount,
 			RefundReason:     l.createNullString(req.RefundReason),
 			Status:           refundStatus, // 使用传入的状态，不再硬编码
@@ -174,6 +176,7 @@ func (l *AdminRefundOrderLogic) createRefundRecordOnly(order *model.Order, req *
 		OrderId:          order.Id,
 		UserId:           order.UserId,
 		ProductId:        order.ProductId,
+		PaymentMerchant:  order.PaymentMerchant,
 		RefundAmount:     req.RefundAmount,
 		RefundReason:     l.createNullString(req.RefundReason),
 		Status:           refundStatus,