ajax无刷新删除

//js代码
$('.coupondelete').click(function(){
    var that = $(this);
    if(confirm('您确定要删除')) {
        var data = {'id':that.data('id')}
        $.ajax({
            url:"{:U('/addon/WeiuidDeit/web/foodcouponDelect')}",
            type:'POST',
            data:data,
            dataType:'json',
            success:function(data){ 
                data = JSON.parse(data);
                if(data.error == 200){
                    //直接移除父级的标签
                    that.parents('tr').remove();
                }
                alert(data.msg);
            },
            error:function(){alert('删除出错')}
        })
    }
})

// 优惠卷删除
  public function foodcouponDelect()
  {
  $id = $_POST['id'];
  if (M('foodcoupon')->delete($id)) {
    $code['msg'] = '删除成功';
    $code['error'] = '200';
  } else {
    $code['msg'] = '删除失败';
    $code['error'] = '400';
  }
  $this->ajaxReturn(json_encode($code));
  }