Gajus\MOA\Mother::__construct PHP Method

    public function __construct(\PDO $db, $id = null)
    {
        $this->db = $db;
        $this->logger = new \Psr\Log\NullLogger();
        // If $data is an integer, then it is assumed by the primary key
        // of an existing record in the database.
        if (is_int($id) || ctype_digit($id)) {
            $this->data[static::PRIMARY_KEY_NAME] = $id;
            $this->synchronise();
        } else {
            if (is_null($id)) {
                $this->data = [];
            } else {
                throw new Exception\InvalidArgumentException('Invalid argument type.');
            }
        }
    }