Cetaklabel/Entities/CardboardDetail.php

<?php

    namespace Modules\Cetaklabel\Entities;

    class CardboardDetail extends BaseModel
    {

        protected $table = 'cardboard_details';

        protected $fillable = [
            'id',
            'cardboard_id',
            'document_id',
            'status',
        ];

        public function cardboard()
        {
            return $this->belongsTo(Cardboard::class);
        }

        public function document()
        {
            return $this->belongsTo(Document::class);
        }
    }