标签管理提交时如果是初始值则赋空值

src/views/template/incomeWmsLabel.vue

@@ -402,7 +402,7 @@ export default {
         if (valid) {
           if (this.paramsItems.length > 0) {
             if (this.paramsItems.length === 1 && this.paramsItems[0].key === '') {
-              this.form.params = undefined
+              this.form.params = null
             } else {
               // 4.校验paramsItems的值
               let list = this.filterArray(this.paramsItems)