From a426caaca3d7315ab84f2a20176be8bdf63a9ec1 Mon Sep 17 00:00:00 2001
From: xupei <xupei3360@163.com>
Date: Fri, 23 Jan 2026 10:54:03 +0800
Subject: [PATCH] =?UTF-8?q?BUGFIX:=20=E7=B3=BB=E7=BB=9F=E6=B6=88=E6=81=AF?=
 =?UTF-8?q?=E5=8F=91=E5=B8=83?=
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---
 .../java/com/ai/da/service/impl/MessageCenterServiceImpl.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java b/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java
index 19927bdb..6189548c 100644
--- a/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java
@@ -253,12 +253,14 @@ public class MessageCenterServiceImpl extends ServiceImpl<NotificationMapper, No
         // 计算总的系统通知数量
         QueryWrapper<Notification> queryWrapper = new QueryWrapper<>();
         queryWrapper.lambda().eq(Notification::getType, "system")
-                .gt(Notification::getCreateTime, account.getCreateDate())
                 .and(wrapper -> wrapper
                         .isNull(Notification::getReceiverId)
                         .or()
                         .eq(Notification::getReceiverId, receiverId)
                 );
+        if (Objects.nonNull(account)) {
+            queryWrapper.lambda().gt(Notification::getCreateTime, account.getCreateDate());
+        }
         Long totalSysCount = baseMapper.selectCount(queryWrapper);
 
         // 计算单个用户读了多少条系统数据