ldc-crm/app/Http/Controllers/AnswerController.php

<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use App\Models\Answer;
use Illuminate\Database\Eloquent\Builder;
use Kwaadpepper\CrudPolicies\Http\Requests\CrudIndexRequest;
use Kwaadpepper\CrudPolicies\Traits\CrudController;

/**
 * @codeCoverageIgnore
 */
class AnswerController extends Controller
{
    use CrudController {
        index as crudIndex;
    }

    /** @var Log */
    public static $modelClass = Answer::class;

    /**
     * The Bo app layout
     *
     * @var string
     */
    public static $layout = 'layouts.app';

    /**
     * Event index crud-policies
     *
     * @param Builder $query
     * @return Builder
     */
    public function indexQuery(Builder $query): Builder
    {
        $parent = request()->question;
        if ($parent) {
            $query->whereHas('question', function ($q) use ($parent) {
                return $q->whereId($parent->id);
            });
        }
        return $query;
    }

    /**
     * Overload crud-policies index
     *
     * @param CrudIndexRequest $request
     * @return \Illuminate\Http\Response
     */
    public function index(CrudIndexRequest $request)
    {
        /** @var \Illuminate\View\View */
        $view = $this->crudIndex($request);
        if ($request->ajax()) {
            return $view;
        }
        return view('answer.index', $view->getData());
    }

    /**
     * Before store model middleware
     *
     * @param Answer $answer
     * @return void
     */
    public function storeModel(Answer &$answer)
    {
        // * Save relation on create
        $answer->question()->associate(request()->question);
    }
}