Add "onlyWhenCreating" and "onlyWhenUpdating" field visibility

[FrittenKeeZ]

If you have fields you only want shown when creating or updating, you currently have to call onlyOnForms and either hideWhenCreating or hideWhenUpdating - it would be convenient if you only need to call one method.

It's easy to add the last two methods as macros in NovaServiceProvider:

use Laravel\Nova\Fields\Field;

/* ... */

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        parent::boot();

        Field::macro('onlyWhenCreating', function () {
            $this->showOnIndex = false;
            $this->showOnDetail = false;
            $this->showOnCreation = true;
            $this->showOnUpdate = false;

            return $this;
        });

        Field::macro('onlyWhenUpdating', function () {
            $this->showOnIndex = false;
            $this->showOnDetail = false;
            $this->showOnCreation = false;
            $this->showOnUpdate = true;

            return $this;
        });
    }

[cwilby]

Clean solution, extended to include closures:

class NovaServiceProvider extends ServiceProvider
{
    ...
    public function boot()
        Field::macro('onlyWhenCreating', function (\Closure $closure = null) {
            $this->showOnIndex = false;
            $this->showOnDetail = false;
            $this->showOnCreation = $closure ? $closure() : true;
            $this->showOnUpdate = false;

            return $this;
        });

        Field::macro('onlyWhenUpdating', function (\Closure $closure = null) {
            $this->showOnIndex = false;
            $this->showOnDetail = false;
            $this->showOnCreation = false;
            $this->showOnUpdate = $closure ? $closure() : true;

            return $this;
        });
    }
    ...
}