Recipe.php

<?php

namespace App\Nova;

use Illuminate\Http\Request;
use Laravel\Nova\Fields\ID;
use Laravel\Nova\Fields\Text;
use Laravel\Nova\Fields\Textarea;
use Laravel\Nova\Fields\Markdown;
use Laravel\Nova\Fields\DateTime;
use Laravel\Nova\Fields\Boolean;
use Laravel\Nova\Fields\HasMany;
use Laravel\Nova\Http\Requests\NovaRequest;

class Recipe extends Resource
{
    /**
     * The model the resource corresponds to.
     *
     * @var string
     */
    public static $model = 'App\Recipe';

    /**
     * Get the fields displayed by the resource.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function fields(Request $request)
    {
        return [
            ID::make()->sortable(),

            Text::make('Name')->rules('required,max:255')->sortable(),

            Textarea::make('Ingredients'),

            Markdown::make('Preparation description'),

            DateTime::make('Published at'),

            Boolean::make('Is featured'),

            HasMany::make('Categories'),

            HasMany::make('Comments')
        ];
    }
}