fix: 场景联动触发器不存在时异常修复

@@ -10,6 +10,8 @@ import org.thingsboard.server.dao.yunteng.mapper.TriggerMapper;
 import org.thingsboard.server.dao.yunteng.service.AbstractBaseService;
 import org.thingsboard.server.dao.yunteng.service.TriggerService;
 
+import java.util.Optional;
+
 /**
  * @Description
  * @Author cxy
@@ -26,6 +28,11 @@ public class TriggerServiceImpl extends AbstractBaseService<TriggerMapper, Trigg
         LambdaQueryWrapper filter = new QueryWrapper<Trigger>().lambda()
                 .eq(Trigger::getSceneLinkageId, sceneId)
                 .eq(Trigger::getEntityId, deviceId);
-        return triggerMapper.selectOne(filter).getDTO(TriggerDTO.class);
+        Trigger trigger = triggerMapper.selectOne(filter);
+        if(trigger == null){
+            return null;
+        }
+
+        return trigger.getDTO(TriggerDTO.class);
     }
 }