bugfix

src/pages/manage/query.vue

@@ -389,8 +389,8 @@ export default {
     onDownload() {
       console.log(this.form.startTime)
       console.log(typeof this.form.startTime)
-      this.form.startTime = typeof this.form.startTime === 'object' ? this.form.startTime.toJSON() : this.form.startTime;
-      this.form.endTime = typeof this.form.endTime === 'object' ? this.form.endTime.toJSON() : this.form.endTime;
+      this.form.startTime = this.form.startTime === null ? '' : typeof this.form.startTime === 'object'  ? this.form.startTime.toJSON() : this.form.startTime;
+      this.form.endTime = this.form.endTime === null ? '' : typeof this.form.endTime === 'object'  ? this.form.endTime.toJSON() : this.form.endTime;
       console.log(this.form.startTime);
       let url = "http://whiteboardtest.ai160.com/manageBase/manage/export?";
       for (let key in this.form) {