From 6f828ee8dde4f646417b1a4c5a1eda4c9ac1cb86 Mon Sep 17 00:00:00 2001
From: tanglong <842690096@qq.com>
Date: Mon, 28 Jul 2025 13:43:33 +0800
Subject: [PATCH] sws

---
 YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
index c1b2ca4..8815e09 100644
--- a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
@@ -140,7 +140,7 @@ namespace YD_AllHeartRates.Api.Services.Impl
                     ClassId = c.Id,
                     ClassName = c.ClassName,
                     GradeName = c.GradeName,
-                    TeacherName = t != null ? t.TeacherName : null
+                    TeacherName = t != null ? t.TeacherName : ""
                 })
                 .OrderBy(x => x.ClassId)
                 .ToListAsync();