If you want to fill a column automatically while you persist data to the database (e.g: slug) use Model Observer instead of hard code it every time
use Illuminate\Support\Str; class Article extends Model{    ...    protected static function boot()    {        parent:boot();         static::saving(function ($model) {            $model->slug = Str::slug($model->title);        });    }}
Tip given by @sky_0xs