Per-locale slugs

Slugs are owned by sluggable-for-laravel, installed with this package. A translatable model gets per-locale slugs with two traits and two interfaces — no cast, no glue:

use Illuminate\Database\Eloquent\Model;
use RoundlyConsulting\Sluggable\Concerns\HasSlug;
use RoundlyConsulting\Sluggable\Contracts\Sluggable;
use RoundlyConsulting\Sluggable\Definitions\SlugDefinition;
use RoundlyConsulting\Sluggable\Definitions\SlugOptions;
use RoundlyConsulting\Translatable\Concerns\HasTranslations;
use RoundlyConsulting\Translatable\Contracts\Translatable;

final class Topic extends Model implements Translatable, Sluggable
{
    use HasTranslations;
    use HasSlug;

    /** @var list<string> */
    public array $translatable = ['name', 'description', 'slug'];

    public function slugOptions(): SlugOptions
    {
        return SlugOptions::make(
            SlugDefinition::for('slug')->from('name')->routeKey(),
        );
    }

    /** @return list<string> */
    protected function translationStatusExcludes(): array
    {
        return ['slug'];
    }
}

$topic = Topic::create(['name' => ['en' => 'Investing', 'sk' => 'Investovanie']]);
$topic->getTranslations('slug');   // ['en' => 'investing', 'sk' => 'investovanie']

How it fits together

• Translatable extends sluggable’s ProvidesLocaleMaps, and HasTranslations implements it: isLocaleMapAttribute() → isTranslatableAttribute(), getLocaleMap() → getTranslations(), setLocaleMap() → setTranslations().
• Sluggable therefore detects the slug attribute as a locale map and builds the sk slug from the sk name regardless of the request locale.
• Every slug it writes goes through translatable’s locale-key validation and strict_locales.
• The model must implement Translatable. A model using HasTranslations without the interface has no cast on its slug, so sluggable refuses it with InvalidSlugDefinitionException (localeMapContractMissing) rather than treating the jsonb column as a plain string.
• Slugs are generated for exactly the supported locales, through the TranslatableSlugLocales binding (see Configuration).

Uniqueness, engine-native unique indexes (SlugIndexes, php artisan sluggable:indexes), querying (whereSlug, whereSlugInAnyLocale, findBySlug), route binding, the UniqueSlug validation rule, slug history and redirects all belong to sluggable — see its documentation.