/**
* unrelated file
*
* @param string $targetId target identifier
* @param string $id file identifier
* @return void
* @throws Exception
*/
public function unRelating($targetId, $id)
{
if ($row = $this->findRelationOne($targetId, $id)) {
$this->conn->beginTransaction();
try {
$row = (array) $row;
$this->conn->table($this->relationTable)->where('id', $row['id'])->delete();
$this->conn->table($this->table)->where('id', $id)->orWhere('parentId', $id)->decrement('useCount');
} catch (Exception $e) {
$this->conn->rollBack();
throw $e;
}
$this->conn->commit();
}
}
