portal/app/Models/Transport.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Relations\MorphTo;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\MorphMany;

class Transport extends AbstractModel
{
    use SoftDeletes;

    protected $table = 'transport_arrangements';

    protected $fillable = ['status', 'drop_date'];

    protected $dates = ['dispatch_date', 'drop_date'];

    /**
     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
     */
    public function owner(): morphTo
    {
        return $this->morphTo();
    }

    /**
     * @return MorphMany
     */
    public function schedules(): morphMany
    {
        return $this->morphMany(Schedule::class, 'owner');
    }
}