Addition of an ordinal number in the Laravel Model - php

Question

I am beginner webdeveloper,
I use in my project Laravel 7 and maatwebsite/excel
I have this code:
namespace App\Models;
use App\Models\Reservation;
use Maatwebsite\Excel\Excel;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\FromQuery;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\Exportable;
class ReservationExport implements FromCollection, WithHeadings
{
use Exportable;
protected $date;
public function __construct(string $date)
{
$this->date = $date;
}
public function headings(): array
{
return [
'LP',
'ID Rezerwacji',
'Adres email',
'Token',
'Data',
'Godzina',
'Tor',
'Płeć',
];
}
public function collection()
{
$res = Reservation::select('id', 'id', 'email', 'token', 'date', 'hour', 'track', 'sex')->where('date', $this->date)->orderBy('time', 'ASC')->orderBy('track', 'ASC')->get();
foreach ($res as $val) {
$val->sex = ($val->sex == 1) ? 'kobieta' : 'mężczyzna';
}
return $res;
}
}
public function export(Request $request)
{
return Excel::download(new ReservationExport($request->input('query')), 'reservation-'.$request->input('query').'.xlsx');
}
This code generates an Excel document. It works fine. I would like to add a sequence number in 1 column (1,2,3 etc).
How can I do this?
My model:
class Reservation extends Model
{
protected $quarded = ['id'];
protected $fillable = ['email', 'token', 'date', 'hour', 'track', 'sex', 'time', 'people'];
public $timestamps = true;
protected $table = 'reservations';
}
Please help

Answer 1

try this
basically u need to add sn to heading then in your collection u need to a new key sn with calculated sequence number
hope it will work if not please tell me what error u r getting
<?php
use App\Models\Reservation;
use Maatwebsite\Excel\Excel;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\FromQuery;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\Exportable;
class ReservationExport implements FromCollection, WithHeadings
{
use Exportable;
protected $date;
public function __construct(string $date)
{
$this->date = $date;
}
public function headings(): array
{
return [
'SN', // sn new key adding
'LP',
'ID Rezerwacji',
'Adres email',
'Token',
'Data',
'Godzina',
'Tor',
'Płeć',
];
}
public function collection()
{
$res = Reservation::select('id', 'id', 'email', 'token', 'date', 'hour', 'track', 'sex')->where('date', $this->date)->orderBy('time', 'ASC')->orderBy('track', 'ASC')->get();
foreach ($res as $val) {
$val->sex = ($val->sex == 1) ? 'kobieta' : 'mężczyzna';
}
$res->map(function ($row,$key) {
return $row['sn'] = $key; // sn key added to collection
});
return $res;
}
}