Backpack 4.1 morphMany relation

App\Http\Controllers\ArticleCrudController

<?php

namespace App\Http\Controllers;

use Backpack\CRUD\app\Http\Controllers\CrudController;
use Backpack\CRUD\app\Library\CrudPanel\CrudPanelFacade as CRUD;

class ArticleCrudController extends CrudController
{
    use \Backpack\CRUD\app\Http\Controllers\Operations\ListOperation;
    use \Backpack\CRUD\app\Http\Controllers\Operations\CreateOperation { store as traitStore; } //IMPORTANT HERE
    use \Backpack\CRUD\app\Http\Controllers\Operations\UpdateOperation { update as traitUpdate; } //IMPORTANT HERE
    use \Backpack\CRUD\app\Http\Controllers\Operations\DeleteOperation;
    use \Backpack\CRUD\app\Http\Controllers\Operations\ShowOperation;

    public function setup()
    {
        CRUD::setModel(\App\Models\Article::class);
        CRUD::setRoute(config('backpack.base.route_prefix') . '/article');
        CRUD::setEntityNameStrings('article', 'articles');
    }

    protected function setupListOperation()
    {
        CRUD::column('title');
    }

    protected function setupCreateOperation()
    {
        CRUD::field('title');
        
        CRUD::field('comments_field')
              ->type('repeatable')
              ->fields([
                [
                    'name' => 'id',
                    'type' => 'hidden',
                ],
                [
                    'name' => 'comment_text',
                    'type' => 'text'
                ]])
        ]);      
    }

    protected function setupUpdateOperation()
    {
        $this->setupCreateOperation();
    }

    protected function setupShowOperation()
    {
        CRUD::column('title');
    }

    public function store()
    {
        $comments = json_decode(request('comments_list'), true);

        $response = $this->traitStore();

        $this->crud->entry->comments()->createMany($comments);

        return $response;
    };

    public function update()
    {
        $comments = collect(json_decode(request('comments_list'), true));

        $response = $this->traitUpdate();

        $created_comments_ids = [];
        
        $comments->each(function($item, $key) use (&$created_comments_ids) {
            if ($item['id']) {
                $this->crud->entry->comments()->updateOrCreate(['id' => $item['id']], $item);
            } else {          
                $created_comments_ids[] = $this->crud->entry->comments()->create($item)->id;
            }

        });
        
        $related_comments_in_request = collect(array_merge($comments->where('id', '!=', '')->pluck('id')->toArray(), $created_comments_id));
        $related_comments_in_db = $this->crud->entry->comments;
        
        $related_comments_in_db->each(function($item, $key) use ($related_comments_in_request) {
            if (!$related_comments_in_request->contains($item['id'])) {
                $item->delete();
            }
        });

        return $response;
    }

App\Models\Article

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Article extends Model
{
    use \Backpack\CRUD\app\Models\Traits\CrudTrait;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'title',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'id' => 'integer',
    ];

    public function comments()
    {
        return $this->morphMany(\App\Models\Comment::class, 'commentable');
    }
    
    //acessor to get the video populated in the repeatable field again
    public function getVideoFieldAttribute() {
        return json_encode($this->comments->map(function($comment) {
            return ['comment_text' => $comment->comment_text];
        }));
    }
}

App\Models\Comment

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Comment extends Model
{
    use \Backpack\CRUD\app\Models\Traits\CrudTrait;
    
    protected $fillable = ['comment_text'];

    /**
     * Get the parent commentable model (article or post).
     */
    public function commentable()
    {
        return $this->morphTo();
    }
}

App\Models\Post

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    use \Backpack\CRUD\app\Models\Traits\CrudTrait;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'title',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'id' => 'integer',
    ];

    public function comments()
    {
        return $this->morphMany(\App\Models\Comment::class, 'commentable');
    }
    
    //acessor to get the video populated in the repeatable field again
    public function getCommentsListAttribute() {
        return json_encode($this->comments->map(function($comment) {
            return ['comment_text' => $comment->comment_text];
        }));
    }
}

.php extension to filenames please? 🙏