autocde2.0/app/Models/AssetGroup.php

<?php

namespace App\Models;

use App\Http\Requests\IndexHelper;
use App\Models\Enums\DisplayIndexObjectType;
use App\Models\Scopes\CompanyScope;
use EloquentFilter\Filterable;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class AssetGroup extends Model
{
    use HasFactory, SoftDeletes, Filterable;

    protected $fillable = [
        'company_id',
        'name',
        'sequence'
    ];

    protected static function booted(): void
    {
        static::addGlobalScope(new CompanyScope);

        static::creating(function (AssetGroup $assetGroup){
            $type =DisplayIndexObjectType::ASSETGROUP;
            $displayIndex = IndexHelper::getObjectMaxIndex($type);
            $assetGroup->display_id =$displayIndex;
        });
    }

    public function Assets(){
        return $this->hasMany(Asset::class,'group_id');
    }
}