带有分类二级的删除

//食品分类删除
    public function foodtypedelete(){
        $id = $_POST['id'];
        $where['pid'] = $id;
        $result = D('foodtype')->where($where)->select();
        if ($result) {
            $code['msg'] = '该分类下有子类';
            $code['error'] = '400';
        } else {
            $whereg['food_type'] = $id;
            $result = D('food')->where($whereg)->select();
            if ($result) {
                $code['msg'] = '该分类下有数据';
                $code['error'] = '400';
            } else {
                if (M('foodtype')->delete($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));
    }
//只有一个分类的删除
// 店铺删除
    public function foodmanagementdelete()
    {
        $id = $_POST['id'];
        if (M('foodmanagement')->delete($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));
    }

前台ajax
$('.typedelete').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/foodmanagementdelete')}",
            type:'POST',
            data:data,
            dataType:'json',
            success:function(data){ 
                data = JSON.parse(data);
                if(data.error == 200){
                    that.parents('tr').remove();
                }
                alert(data.msg);
            },
            error:function(){alert('删除出错')}
        })
    }
})