补齐相关日志日志

internal/service/notification.go

@@ -76,6 +76,8 @@ func (s *NotificationService) Read(ctx context.Context, userID int64, request *d
 		if isNotFound(err) {
 			return nil, errcode.NotificationNotFound
 		}
+		slog.ErrorContext(ctx, "read notification: query notification failed",
+			"notification_uuid", request.NotificationUUID, "user_id", userID, "error", err)
 		return nil, errcode.DatabaseError
 	}
 	if n.UserID != userID {
@@ -93,6 +95,8 @@ func (s *NotificationService) Read(ctx context.Context, userID int64, request *d
 
 	// 条件标记已读（仅未读 -> 已读），防并发重复标记。
 	if _, err := s.notificationDao.NotificationUpdateReadByUUIDIfUnread(ctx, request.NotificationUUID); err != nil {
+		slog.ErrorContext(ctx, "mark notification read failed",
+			"notification_uuid", request.NotificationUUID, "user_id", userID, "error", err)
 		return nil, errcode.DatabaseError
 	}
 	// 无论本次是否真的标记成功，都按 DB 重新统计并回填缓存：
@@ -127,8 +131,11 @@ func (s *NotificationService) unreadCount(ctx context.Context, userID int64) (in
 			slog.WarnContext(ctx, "count unread from db failed, fallback to redis",
 				"user_id", userID, "error", err)
 			return rcnt, nil
+		} else {
+			slog.ErrorContext(ctx, "count unread failed: db and redis both unavailable",
+				"user_id", userID, "db_error", err, "redis_error", rerr)
+			return 0, errcode.DatabaseError
 		}
-		return 0, errcode.DatabaseError
 	}
 	if serr := redisdao.NotificationUnreadSet(ctx, userID, cnt); serr != nil {
 		slog.WarnContext(ctx, "backfill notification unread cache failed",
@@ -167,6 +174,7 @@ func sendNotification(ctx context.Context, recipientUserID, senderID int64, msgT
 		return
 	}
 	if _, err := redisdao.NotificationUnreadIncr(ctx, recipientUserID); err != nil {
-		slog.ErrorContext(ctx, "notification unread incr failed", "user_id", recipientUserID, "error", err)
+		// 未读数是 best-effort 缓存：失败不影响通知已落库，级别与「通知创建失败」保持一致。
+		slog.WarnContext(ctx, "notification unread incr failed", "user_id", recipientUserID, "error", err)
 	}
 }