function up_position_home()
{
$max = new article();
$max->select_max('home_hot_position');
$max->where('home_hot_position <', $this->home_hot_position);
$max->where('home_hot', 1);
$max->get();
$o = new article();
$o->where('home_hot_position', $max->home_hot_position);
$o->where('home_hot', 1);
$o->get();
if ($o->result_count() > 0) {
$tg = $this->home_hot_position;
$this->home_hot_position = $o->home_hot_position;
$o->home_hot_position = $tg;
$o->save();
$this->save();
$this->arrange_position_home();
return true;
} else {
return false;
}
}