invoiceninja/app/Models/CompanyLedger.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2020. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class CompanyLedger extends Model
{
    protected $dateFormat = 'Y-m-d H:i:s.u';

    protected $guarded = [
        'id',
    ];
    
    protected $casts = [
        'updated_at' => 'timestamp',
        'created_at' => 'timestamp',
        'deleted_at' => 'timestamp',
    ];

    public function getEntityType()
    {
        return CompanyLedger::class;
    }

    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function company()
    {
        return $this->belongsTo(Company::class);
    }

    public function company_ledgerable()
    {
        return $this->morphTo();
    }
}