public function sort($id, $sort)
{
if (!in_array($sort, array('up', 'down'))) {
return redirect_message(array('admin', $this->get_class()), array('_flash_message' => '排序失敗！'));
}
$total = Promo::count();
switch ($sort) {
case 'up':
$sort = $this->promo->sort;
$this->promo->sort = $this->promo->sort + 1 >= $total ? 0 : $this->promo->sort + 1;
break;
case 'down':
$sort = $this->promo->sort;
$this->promo->sort = $this->promo->sort - 1 < 0 ? $total - 1 : $this->promo->sort - 1;
break;
}
Promo::addConditions($conditions, 'sort = ?', $this->promo->sort);
$promo = $this->promo;
$update = Promo::transaction(function () use($conditions, $promo, $sort) {
if (($next = Promo::find('one', array('conditions' => $conditions))) && (($next->sort = $sort) || true)) {
if (!$next->save()) {
return false;
}
}
if (!$promo->save()) {
return false;
}
return true;
});
if (!$update) {
return redirect_message(array('admin', $this->get_class()), array('_flash_message' => '排序失敗！', 'posts' => $posts));
}
return redirect_message(array('admin', $this->get_class()), array('_flash_message' => '排序成功！'));
}