izyim/app/Models/ShippingSchedule.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Spatie\Activitylog\Traits\LogsActivity;

class ShippingSchedule extends Model
{

    use LogsActivity;

    protected $table = 'shipping_schedules';

    protected $fillable = [
        'arrangement_id', 'ETD', 'ETA', 'status'
    ];

    protected static $logFillable  = true;

    public function shippingArrangement()
    {
        return $this->belongsTo(ShippingArrangement::class, 'arrangement_id');
    }

    public function customIssue()
    {
        return $this->hasOne(OrderStep::class, 'schedule_id');
    }
}