laravelio/laravel.io

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;

final class Article extends Model
{
    //
    public function scopeForTag(Builder $query, string $tag): Builder
    {
        return $query->whereHas('tagsRelation', function ($query) use ($tag) {
            $query->where('tags.slug', $tag);
        });
    }
    //
}