dd

src/views/modules/base/diyInfo.vue

@@ -257,12 +257,15 @@ export default {
     },
     handlePreview(id) {
       if (id) this.getPreview(id)
-      else this.previewList = this.rightList.map(item => {
+      else {
+        if (this.rightList.length == 0) return this.$message.error('请选择导出信息')
+        this.previewList = this.rightList.map(item => {
         return {
           label: item.groupName,
           children: item.queryItemList
         }
       })
+      }
       this.diyDialog = true
     },
     handleExport() {