//Front-end data submission
$('#submit').on("click",function (event) {
alert("hao");
$.ajax( {
type: "POST",
url: "{:url('Ruku/tianjia')}",
data: $("#form-admin-add").serialize(),
dataType: "json",
success: function(data){
alert(data);
}#%2
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Try changing it to the following:
$param = $this->request->param();