invoiceninja/app/Models/RecurringInvoiceInvitation.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 RecurringInvoiceInvitation extends BaseModel
{

    protected $fillable = ['client_contact_id'];

    protected $touches = ['recurring_invoice'];

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

    /**
     * @return mixed
     */
    public function recurring_invoice()
    {
        return $this->belongsTo(RecurringInvoice::class)->withTrashed();
    }

    /**
     * @return mixed
     */
    public function contact()
    {
        return $this->belongsTo(ClientContact::class)->withTrashed();
    }

    /**
     * @return mixed
     */
    public function user()
    {
        return $this->belongsTo(User::class)->withTrashed();
    }

    /**
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function company()
    {
        return $this->belongsTo(Company::class);
    }


}