/**
* 创建外链
*/
public function create($userId, $fileId)
{
$mode = Link::model()->find("user_id=:user_id and file_id=:file_id", array("user_id" => $userId, "file_id" => $fileId));
if (!isset($mode)) {
$mode = new Link();
//寻找唯一的Key，如果发现系统已经存在，则重新生成一个，直到寻找到
$shareKey = MiniUtil::randomString(6);
$link = $this->getByKey($shareKey);
while (!empty($link)) {
$shareKey = MiniUtil::randomString(8);
$link = $this->getByKey($shareKey);
}
$mode->expiry = -1;
$mode->password = "******";
$mode->share_key = $shareKey;
}
$mode->file_id = $fileId;
$mode->user_id = $userId;
$mode->save();
return $this->db2Item($mode);
}
