!509 Data tracing issue was modified. If the value of the object popup is...

!509 Data tracing issue was modified. If the value of the object popup is null, modify it to display None in the popup table
Merge pull request !509 from 秦君艳/datatrack

mindinsight/ui/src/views/train-manage/data-traceback.vue

@@ -1914,7 +1914,11 @@ export default {
             Object.keys(dataObj[key]).forEach((k, j) => {
               const item = {};
               item.key = k;
-              item.value = dataObj[key][k];
+              if (dataObj[key][k] === null) {
+                item.value = 'None';
+              } else {
+                item.value = dataObj[key][k];
+              }
               item.id =
                 `${new Date().getTime()}` + `${this.$store.state.tableId}`;
               this.$store.commit('increaseTableId');