siopas-istw-website/app/Exports/PetternLotPetiExport.php

<?php

namespace App\Exports;

use App\Models\Peti;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\FromCollection;

class PetternLotPetiExport implements FromCollection, WithHeadings
{
    public function collection()
    {
        // Ambil data dari model Peti
        $petis = Peti::select(
            'customer_id',
            'warehouse_id',
            'jumlah',
            'tipe_peti_id',
            'packing_no',
            'fix_lot',
        )->get();

        // Inisialisasi nomor awal
        $nomor = 1;

        // Modifikasi data dan tambahkan nomor
        $data = $petis->map(function ($peti) use (&$nomor) {
            return [
                'No' => $nomor++,
                'User' => 'ISTW',
                'Customer' => $peti->customer->name,
                'Warehouse' => $peti->warehouse->name,
                'CODE CUSTOMER' => $peti->customer->code_customer,
                'TYPE PETI' => $peti->tipe_peti->type,
                'UKURAN PETI' => $peti->tipe_peti->size_peti,
                'LOT NO' => $peti->customer->lot_no,
                'PACKING NO' => $peti->packing_no,
                'FIX LOT' => $peti->fix_lot,
            ];
        });

        return $data;
    }

    public function headings(): array
    {
        return [
            'No',
            'User',
            'Customer',
            'WH',
            'CODE CUSTOMER',
            'TYPE PETI',
            'UKURAN PETI',
            'LOT NO',
            'PACKING NO',
            'FIX LOT',
        ];
    }
}