Nette\Database\Drivers\PgSqlDriver::convertException PHP Method

    public function convertException(\PDOException $e)
    {
        $code = isset($e->errorInfo[0]) ? $e->errorInfo[0] : NULL;
        if ($code === '0A000' && strpos($e->getMessage(), 'truncate') !== FALSE) {
            return Nette\Database\ForeignKeyConstraintViolationException::from($e);
        } elseif ($code === '23502') {
            return Nette\Database\NotNullConstraintViolationException::from($e);
        } elseif ($code === '23503') {
            return Nette\Database\ForeignKeyConstraintViolationException::from($e);
        } elseif ($code === '23505') {
            return Nette\Database\UniqueConstraintViolationException::from($e);
        } elseif ($code === '08006') {
            return Nette\Database\ConnectionException::from($e);
        } else {
            return Nette\Database\DriverException::from($e);
        }
    }