public function updateSort()
{
$orders = Q("fieldsort");
if ($orders) {
$model = new ModelFieldModel($this->_mid);
foreach ($orders as $k => $v) {
$model->join(null)->save(array("fid" => $k, "fieldsort" => $v));
}
$model->updateCache(intval($_GET['mid']));
$this->_ajax(1, "排序成功");
} else {
$this->_ajax(0, $model->error);
}
}