<?php

namespace App\Nova\Actions;

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

class AttachCropToProduct extends Action
{
    use InteractsWithQueue, Queueable;

    /**
     * Perform the action on the given models.
     *
     * @param  \Laravel\Nova\Fields\ActionFields  $fields
     * @param  \Illuminate\Support\Collection  $models
     * @return mixed
     */
    public function handle(ActionFields $fields, Collection $models)
    {
        foreach ($models as $model) {
            if ($fields->type === 'trials') {
                $model->trial_results()->attach($fields->crops);
            }
            if ($fields->type === 'nutrition') {
                $model->nutrition_programs()->attach($fields->crops);
            }
        }
    }

    /**
     * Get the fields available on the action.
     *
     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
     * @return array
     */
    public function fields(NovaRequest $request)
    {
        $product = Product::query()->find($request->resourceId ?? $request->resources);
        $cropsID = [];
//        dd($crop);
        if ($product->crops) {
            foreach ($product->crops as $crop) {
                $cropsID[] = $crop->id;
            }
        }
//        dd($crop->flyers);

        $cropsAll = Crop::query()->whereNotIn('id', $cropsID)->get();
        $crops = [];
        foreach ($cropsAll as $crop) {
            $crops[(integer)$crop->id] = $crop->slug;
        }
        return [
            Select::make('Type')->options([
                'trials' => 'Trial Results Crop',
                'nutrition' => 'Nutrition Programs Crop',
            ])->required(),
            MultiSelect::make('Crops')
                ->options($crops),
        ];
    }
}

• [F] AttachCropToProduct.php
  Delete
• [F] AttachFlyerToCrop.php
  Delete