fix: 物模型null异常处理

@@ -575,7 +575,10 @@ public class ThingsModelServiceImpl
                         .eq(isCategory, TkThingsModelEntity::getCategoryId, entity.getCategoryId())
                         .eq(!isCategory, TkThingsModelEntity::getDeviceProfileId, entity.getDeviceProfileId()));
         if(sortEntity==null){
-            sortEntity=getSortEntityList(entity,isCategory).stream().filter(s->{return s.getSort().intValue()==sort.intValue();}).findFirst().get();
+            Optional<TkThingsModelEntity> optional=getSortEntityList(entity,isCategory).stream().filter(s->{return s.getSort().intValue()==sort.intValue();}).findFirst();
+            if(optional.isPresent()) {
+                sortEntity = optional.get();
+            }
         }
         return sortEntity;
     }