Default Filter Value for Filterable Fields

[treed-eaglemetal]

Filters support the concept of default values, but filterable fields do not.

I would like to propose the following syntax:

Select::make('Status')->filterable(default: 'active');
Select::make('Status')->filterable(null, 'active');
Select::make('Status')->filterable()->filterableDefault('active');

This is actually very easy to implement in the source code. On the Filterable trait, you can make the following modifications:

Laravel\Nova\Fields\Filterable:

public function filterable(?callable $filterableCallback = null, mixed $filterableDefault = null)
{
    /* ... */

    $this->filterableDefault = $filterableDefault;
}

As well as add the direct mutator:

public function filterableDefault(mixed $filterableDefault)
{
    $this->filterableDefault = $filterableDefault;
}

Then, in the Field Filter, override the default method:

Laravel\Nova\Fields\Filters\Filter:

public function default()
{
    return $this->field->filterableDefault;
}

The workaround without this feature is to fully define a custom filter, which feels like overkill for such a small change.

[FJMR17]

While we wait for the Nova team to add this, we can address the situation using this excellent package:

https://novapackages.com/packages/javii-script/default-value-filterable