fix

src/main/java/cn/com/qmth/scancentral/service/impl/ExamRoomServiceImpl.java

@@ -7,6 +7,8 @@ import org.springframework.transaction.annotation.Transactional;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
@@ -68,11 +70,18 @@ public class ExamRoomServiceImpl extends ServiceImpl<ExamRoomDao, ExamRoomEntity
         lw.eq(ExamRoomEntity::getExamRoom, req.getExamRoom());
         ExamRoomEntity e = this.getOne(wrapper);
         if (!e.getScanned()) {
-            e.setScanned(true);
-            this.save(e);
+            updateScanned(e.getId(), true);
         }
     }
 
+    private void updateScanned(Long id, Boolean scanned) {
+        UpdateWrapper<ExamRoomEntity> wrapper = new UpdateWrapper<>();
+        LambdaUpdateWrapper<ExamRoomEntity> lw = wrapper.lambda();
+        lw.eq(ExamRoomEntity::getId, id);
+        lw.set(ExamRoomEntity::getScanned, scanned);
+        this.update(wrapper);
+    }
+
     @Override
     public List<CampusVo> listCampusByExamId(Long examId) {
         return this.baseMapper.listCampusByExamId(examId);