etl映射配置数据源可以清空

src/view/Manage/DatasourceManage/Component/ETLConfigModal.jsx

@@ -39,6 +39,7 @@ const DataSourceSelect = (props) => {
       style={{ width: 120 }}
       onChange={handleChange}
       value={value}
+      allowClear
     >
     {
       (selectData||[]).map((item, index) => {
@@ -216,7 +217,7 @@ const ETLConfigModal = (props) => {
   }
 
   const onDatasouceChange = (value, index) => {
-    const newEtlMapping = {...etlMappings[index], replaceSystemId: value};
+    const newEtlMapping = {...etlMappings[index], replaceSystemId: value||''};
 
     setLoading(true);
     dispatch({