ChangeValue.php

<?php

declare (strict_types = 1);

namespace App\Nova\Actions;

use App\Models\Product;
use App\Models\Retailer;
use Illuminate\Bus\Queueable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Support\Collection;
use Laravel\Nova\Actions\Action;
use Laravel\Nova\Fields\ActionFields;
use Laravel\Nova\Fields\Select;
use Laravel\Nova\Http\Requests\NovaRequest;

class ChangeValue extends Action
{
    use InteractsWithQueue, Queueable;

    public ?string $field;
    public ?string $retailer;

    public function __construct(?string $field, ?string $retailer)
    {
        $this->field = $field;
        $this->retailer = $retailer;
    }

    public function handle(ActionFields $fields, Collection $models)
    {
        dd($models);

        foreach ($models as $model) {
            Product::where('retailer_id', $this->retailer)->where('sku', $model['sku'])->update([$this->field => $model[$this->field]]);
        }
        return Action::redirect('/');
    }

    public function fields(NovaRequest $request)
    {
        return [
            Select::make('Retailer from change', 'fromRetailer')
                ->options(
                    Retailer::pluck('name', 'id')->all()
                )
                ->rules('required'),
        ];
    }
}