public function autoFill()
    {
        // The date format method to use with Carbon to convert the dates
        $dateFormatMethod = 'to' . strtolower($this->format) . 'String';

        if (null === $this->pubDate) {
            $this->pubDate = Carbon::parse('now')->{$dateFormatMethod}();
        }

        if (null === $this->summary) {
            $summary = strip_tags($this->content);

            $this->summary = substr($summary, 0, 144) . '...';
        }
    }