xshop/app/Models/Category.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;
use Spatie\Translatable\HasTranslations;

class Category extends Model
{
    use HasFactory, HasTranslations,SoftDeletes;

    public $translatable = ['name', 'subtitle', 'description'];

    public function imgUrl()
    {
        if ($this->image == null) {
            return asset('/assets/upload/logo.svg');
        }

        return \Storage::url('categories/' . $this->image);
    }

    public function bgUrl()
    {
        if ($this->bg == null) {
            return asset('/assets/upload/logo.svg');
        }

        return \Storage::url('categories/' . $this->bg);
    }

    public function parent()
    {
        return $this->belongsTo(Category::class, 'parent_id');
    }

    public function children()
    {
        return $this->hasMany(Category::class, 'parent_id');
    }

    public function getRouteKeyName()
    {
        return 'slug';
    }

}