移动代码

public function move()

     {

      $id = $_GET['id'];

      $same_field = isset($_GET['same_field'])?$_GET['same_field']:'pid';

      

   if(!in_array($_GET['type'],array("up","down")) && !in_array($same_field,array('pid','menu_id')))

   {

    $this->ajaxReturn(0,"参数错误！",0);

   }

   

   $where = array();

   //取得当前配置信息

   $current = $this->model->where("id=".$id)->find();

   $where = array($same_field => $current[$same_field]);

   

   //上移：是否已在最上面

   if($_GET['type'] == 'up')

   {

    $where['weight'] = array("lt",$current['weight']);

    $neighbor = $this->model->where($where)->order("weight desc")->find();

    $sql = M()->getLastSql();

    if(!$neighbor)

    {

     $this->ajaxReturn(0,$sql."移动失败，已经在最上面了！",0);

    }

   }

   

   //下移：是否已在最下面

   if($_GET['type'] == 'down')

   {

    $where['weight'] = array("gt",$current['weight']);

    $neighbor = $this->model->where($where)->order("weight asc")->find();

    if(!$neighbor)

    {

     $this->ajaxReturn(0,"移动失败，已经在最下面了！",0);

    }

   }

   

   //开始移动

   if($neighbor)

   {

    $neighbor_data = array("weight" => $current['weight']);

    $current_data = array("weight" => $neighbor['weight']);

    

    $this->model->data($neighbor_data)->where("id = ".$neighbor['id'])->save();

    $this->model->data($current_data)->where("id = ".$current['id'])->save();

    

    $this->ajaxReturn(0,"移动成功！",1);

   }

  }