fix 找不到Node报错

src/views/datasheet_manage/mixins/classifyMixin.js

@@ -43,7 +43,7 @@ export default {
     selectCurrentNode({ code, id, type }) {
       let deep_arr = _.cloneDeep(this.treeData);
       // 查找图表的分类父级id
-      let arr = this.findParentNodeHandle(deep_arr, code).slice(1).reverse(); // 父的父的父-父的父-父
+      let arr = (this.findParentNodeHandle(deep_arr, code)||[]).slice(1).reverse(); // 父的父的父-父的父-父
       this.defaultShowNodes = arr;
       this.select_node = code;
       this.$refs.treeRef.setCurrentKey(this.select_node);