README

Examples

Type

class TypeFilter extends DependentFilter
{
    public $component = 'dependent-filter';

    public $attribute = 'type';

    public $name = 'Type';

    public function options(Request $request, array $filters = []): array
    {
        return collect(TypeEnum::cases())->mapWithKeys(function ($case) {
            return [$case->value => $case->name()];
        })->toArray();
    }
}

Category (Dependent of Type)

class CategoryFilter extends DependentFilter
{
    public $component = 'dependent-filter';

    public $attribute = 'category_id';

    public $dependentOf = ['type'];

    public $name = 'Category';

    public function options(Request $request, array $filters = []): array
    {
        if (! empty($filters['type'])) {
            return Category::query()
                ->where('type', $filters['type'])
                ->whereNull('parent_id')
                ->pluck('title', 'id')
                ->toArray();
        }

        return [];
    }
}

SubCategory (Dependent of Category)

class SubCategoryFilter extends DependentFilter
{
    public $component = 'dependent-filter';

    public $attribute = 'sub_category_id';

    public $dependentOf = ['category_id'];

    public $name = 'Sub Category';

    public function options(Request $request, array $filters = []): array
    {
        if (! empty($filters['category_id'])) {
            return Category::query()
                ->where('parent_id', $filters['category_id'])
                ->pluck('title', 'id')
                ->toArray();
        }

        return [];
    }
}

Usage

public function filters(NovaRequest $request): array
{
    return [
        new TypeFilter,
        new CategoryFilter,
        new SubCategoryFilter,
    ];
}