How to change model field on update event?

Question

Laravel

There is a model update event assigned to updated.
I'm trying to update some model attributes on change but can't do it. What am I doing wrong?

class TagEvent
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $tag;

    public function __construct(Tag $tag)
    {
        $this->tag = $tag;
        event(new SocketMessage($tag));
        $geocode = new Geocode($tag->internal_latitude, $tag->internal_longitude);
        $geocode->reverse();
        $tag->airport = $geocode->airport_name;
        $tag->city = $geocode->city;
        $tag->country = $geocode->country;
        $this->calculateDistance();
    }

Answer 1

To change, you need to respond to the updating event. You can't change the model after the update

Answer 2

Try adding to the end:
$tag->save();