编辑分组时，拦截无标签

src/view/memberGroup/memberGroupEdit.vue

@@ -362,10 +362,15 @@ export default {
       this.$refs.ruleForm.validate(valid => {
         if (valid) {
           const flag = this.ruleForm.isActive === 0 && this.ruleForm.updateType !== 1 && this.ruleForm.updateDay === '';
+          const isEmpty = this.ruleForm.selectedTags.length === 0 || this.ruleForm.selectedTags.every(item => item.length === 0);
           if (flag) {
             this.$message.error({ message: '请选择更新频率!' });
             return false;
           }
+          if (isEmpty) {
+            this.$message.error({ message: '请至少保留一个标签!' });
+            return false;
+          }
           this.postSave();
         }
       });