/**
* 获取状态变更按钮
* 如果是最后一个状态，则不扭转
* @param \Lite\DB\Model $model 数据模型
* @param null $field 状态字段名
* @param array $state_options 状态扭转选项（缺省读取options）
* @return string
* @throws \Lite\Exception\Exception
*/
public static function getNextStateBtn(Model $model, $field = null, $state_options = array())
{
if (!$field && $model instanceof ModelInterface) {
$field = $model->getStateKey();
}
if (!$field) {
throw new Exception('next state field not found');
}
$options = $state_options ?: $model->getPropertiesDefine($field)['options'];
$val = $model->{$field};
$pk = $model->getPrimaryKey();
$matched = false;
foreach ($options as $k => $opt_name) {
if ($val == $k) {
$matched = true;
} else {
if ($matched) {
return '<a href="' . self::getUrl(self::getController() . '/state', array($field => $k, $pk => $model->{$pk})) . '" rel="async" class="state-changer btn">' . $opt_name . '</a>';
}
}
}
return '';
}