pds/app/Models/InvoiceDataValidation.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Prunable;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\SoftDeletes;

class InvoiceDataValidation extends Model
{
    use Prunable;
    use SoftDeletes;

    protected $dates = ['deleted_at'];

    protected $fillable = [
        'plant_id',
        'distribution_channel_desc',
        'customer_code',
        'document_number',
        'document_date',
        'customer_trade_name',
        'customer_location',
        'location',
        'remark',
        'created_at',
        'created_by',
        'updated_by',
        'updated_at',
    ];

    public function plant(): BelongsTo
    {
        return $this->belongsTo(Plant::class);
    }

    public function prunable(): Builder
    {
        return static::where('created_at', '<=', now()->subMonthsNoOverflow(6));
    }
}