Retrieve result from the query for the heading row

[mycarrysun]

I can't find any other way to do the headings based on my query without calling the query an extra time. I'd like to grab the first item out of the query instead of hitting the database twice, just to get the row headings which seems unnecessary, and probably a pretty common use case. I figured this would be something that is built in. Am I just missing something in the docs? This is what I currently have working:

class PermitCsvExport implements FromQuery, WithMapping, WithHeadings
{
    private array $permit_ids;

    function __construct(array $permit_ids)
    {
        $this->permit_ids = $permit_ids;
    }

    public function query(){
        return Permit::with([
            'vehicle',
            'carrier.phys_addr',
        ])->whereIn('id', $this->permit_ids);
    }

    public function map($permit) : array
    {
        return $permit->transformForCsv();
    }

    public function headings(): array
    {
        $permit = $this->query()->first();

        return array_keys($this->map($permit));
    }
}

[chatisk]

No, you are not missing anything. It's built this way, to accept only "static" values for headings. Can;t be dynamic. You need to pass it, I guess, yourself, via the constructor. An array or smth. So you can append them when you call headings() . I have stumbled upon the same problem.