Laravel nova resource extending/overriding the create method

I am developing a web admin panel using Laravel Nova.

I am having an issue since Nova is quite a new technology.

What I would like to do now is I would like to add a hidden field or extend or override the create method.

This is my scenario. Let's say I have a vacancy nova resource with the following field.

public function fields(Request $request)
{
    return [
        ID::make()->sortable(),
        Text::make('Title')->sortable(),
        Text::make('Salary')->sortable()
        // I will have another field, called created_by
    ];
}

Very simple. What I like to do is I want to add a new field called created_by into the database. Then that field will be auto filled with the current logged user id ($request->user()->id).

How can I override or extend the create function of Nova? How can I achieve it?

I can use resource event, but how can I retrieve the logged in user in the event?

What you're looking for is Resource Events.

From the docs:

All Nova operations use the typical save, delete, forceDelete, restore Eloquent methods you are familiar with. Therefore, it is easy to listen for model events triggered by Nova and react to them. The easiest approach is to simply attach a model observer to a model:

If you don't feel like creating a new observable you could also create a boot method in your eloquent model as so:

public static function boot()
{
    parent::boot();

    static::creating(function ($vacancy) {
        $vacancy->created_by = auth()->user()->id;
    });
}

But please do note that these are a bit harder to track than observables, and you or a next developer in the future might be scratching their head, wondering how's the "created_at" property set.