izyim/app/Models/Document.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Spatie\Activitylog\Traits\LogsActivity;

class Document extends Model
{

    use LogsActivity;

    protected $table = 'documents';

    protected $fillable = [
        'type', 'reference_id', 'document_type', 'name', 'primary'
    ];

    protected static $logFillable  = true;
}