fix: add convert data filter

@@ -19,7 +19,6 @@ import org.thingsboard.server.common.data.yunteng.core.exception.TkDataValidatio
 import org.thingsboard.server.common.data.yunteng.core.message.ErrorMessage;
 import org.thingsboard.server.common.data.yunteng.dto.convert.ConvertConfigDTO;
 import org.thingsboard.server.common.data.yunteng.dto.DeleteDTO;
-import org.thingsboard.server.common.data.yunteng.dto.convert.DatasourceContentDTO;
 import org.thingsboard.server.common.data.yunteng.utils.tools.TkPageData;
 import org.thingsboard.server.dao.yunteng.ConvertConfig;
 import org.thingsboard.server.dao.yunteng.mapper.ConvertConfigMapper;
@@ -405,7 +404,13 @@ public class TkConvertConfigServiceImpl
       Map<String, String> scriptMap = new HashMap<>();
       scriptMap.put(
           "jsScript",
-          "msg.deviceId = metadata.deviceId;\nmsg.deviceName = metadata.deviceName;\nmsg.deviceType = metadata.deviceType;\nmsg.ts = metadata.ts;\nreturn {msg: msg, metadata: metadata, msgType: msgType};");
+          "msg.deviceId = metadata.deviceId;\n"
+              + "msg.deviceName = metadata.deviceName;\n"
+              + "msg.deviceType = metadata.deviceType;\n"
+              + "if(msg.ts !=null){\n"
+              + "    msg.ts = metadata.ts;\n"
+              + "}\n"
+              + "return {msg: msg, metadata: metadata, msgType: msgType};");
       types.put(scriptType, JacksonUtil.toString(scriptMap));
       scriptIndex = addOriginatorFieldsAndScript(types, ruleChainMetaData, seriesIndex);
     }