public function perms()
{
if (self::$perms !== null) {
return self::$perms;
}
$perms = [];
foreach (self::find($this->id)->roles as $role) {
foreach ($role->perms as $perm) {
$perms[] = $perm;
}
}
//进行去重
return self::$perms = array_unique($perms);
}
