<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Attribute extends Model
{
    use HasFactory;

    protected $guarded = ['id'];

    protected static function boot()
    {
        parent::boot();
        static::addGlobalScope('order', function (Builder $builder) {
            $builder->orderByRaw('ISNULL(sort_order), sort_order ASC');
        });
    }

    public function group()
    {
        return $this->belongsTo(AttributeGroup::class, 'group_id');
    }

    public function values()
    {
        return $this->hasMany(AttributeValue::class);
    }

    public function products()
    {
        return $this->belongsToMany(Product::class);
    }
}