Tp を使用して列を削除します

public function privilege_bdel(){
        $ids = I('ids');
        $pri = D('privilege');
        $ids = implode(',', $ids);
        if($ids){
            if($pri->delete($ids)){
                $this->success('批量删除栏目成功！',U('Privilege/privilege_lst'));
            }else{
                $this->error('批量删除栏目失败，请重试！');
            }
        }else{
            $this->error('未选中任何内容，请重试！');
        }
    }

public function _before_delete($options){
        //批量删除
        if(is_array($options['where']['id'])){
            $arr = explode(',', $options['where']['id'][1]);
            $sonpri = array();
            foreach ($arr as $k => $v) {
                $sonpri2 = $this->childid($v);
                $sonpri = array_merge($sonpri,$sonpri2);
            }
            $sonpri = array_unique($sonpri);
            $chilrenids = implode(',', $sonpri);
        }else{//单个删除
            $chilrenids =$this->childid($options['where']['id']);
            $chilrenids = implode(',', $chilrenids);
        }
        if($chilrenids){
            $this->execute("delete from ed_privilege where id in($chilrenids)");
        }
    }