---
title: "Validation — Sluggable for Laravel | Roundly"
description: "UniqueSlug and ValidSlug rules with the exact generation semantics — scoped, locale-aware and safe against cross-tenant probing."
url: https://roundly-consulting.com/open-source/docs/sluggable-for-laravel/validation
language: en
---

[All packages](https://roundly-consulting.com/open-source.md)

[Sluggable for Laravel](https://roundly-consulting.com/open-source/docs/sluggable-for-laravel.md)

# Validation

```php
use Illuminate\Validation\Rule;
use RoundlyConsulting\Sluggable\Rules\UniqueSlug;
use RoundlyConsulting\Sluggable\Rules\ValidSlug;

$request->validate([
    'slug' => ['nullable', 'string', ValidSlug::for(Product::class),
               UniqueSlug::for(Product::class)->ignore($product)->where('clinic_id', $clinicId)],
]);

'slug' => ['nullable', 'array', UniqueSlug::for(Topic::class)->ignore($topic)],   // every locale
'slug' => [Rule::uniqueSlug(Topic::class, 'slug')->locale('sk')],
'slug' => [UniqueSlug::for(Product::class)->within($clinic)],                      // scope from a model
'slug' => [UniqueSlug::for(Product::class)->scopeFromInput('clinic_id')],          // opt-in: scope from input
'slug' => [new ValidSlug(separator: '-', maxLength: 255, unicode: false, lowercase: true, reserved: [])],
```

## UniqueSlug

- Uses exactly the generation semantics — scopes, trashed rows, no global scopes, reserved words — and compares the normalised value under the Normalize policy.
- ignore() skips the record being edited (a model or a key); locale('sk') checks one locale only.
- Scope values are never read from the request implicitly — that would be a cross-tenant “is this slug taken?” oracle. Per scope column: where(), then the within() / ignore($model) model’s attribute, then — only for columns named in scopeFromInput() — the validated data; otherwise the rule throws missingScopeValue.
- Locale-map input: a string means the current (or locale()) locale; arrays check every supported locale; unsupported locales are ignored; errors land on slug.{locale}.

## ValidSlug

ValidSlug passes when the value equals its own normalisation, fits maxLength and is not reserved. ValidSlug::for(Model::class) uses the definition’s format and reserved words; the constructor takes them explicitly, as in the last example above.

## Rule macros

Rule::uniqueSlug(Model::class, $column) and Rule::validSlug(Model::class, $column) return the same rules and are known to PHPStan through the package extension.

## Messages

| Key | Default message |
| --- | --- |
| `sluggable::validation.unique` | The :attribute has already been taken. |
| `sluggable::validation.unique_locale` | The :attribute (:locale) has already been taken. |
| `sluggable::validation.format` | The :attribute must be a valid slug (lowercase letters, numbers and separators). |
| `sluggable::validation.too_long` | The :attribute may not be longer than :max characters. |
| `sluggable::validation.reserved` | The :attribute is reserved and cannot be used. |
| `sluggable::validation.locked` | The slug \[:attribute\] on \[:model\] is locked and cannot be changed; wrap the change in Slugs::unlocked() to override. |

English and Slovak ship. Publish them with --tag=sluggable-translations to change the wording or add a language. locked is the SlugLockedException message (:attribute is the column or column.locale, :model the model class).

## Show your open-source love

This package is free and MIT-licensed. If it saves you time, a one-off donation or a Patreon membership keeps it maintained, tested and documented.

[More ways to support, including crypto](https://roundly-consulting.com/support-us.md)

By donating, you agree to our [donation terms](https://roundly-consulting.com/donation-terms.md).

[Support our open source work (opens in a new tab)](https://donate.stripe.com/dRmeVe8FX5PF1Qd9pXcEw00) [Join us on Patreon (opens in a new tab)](https://www.patreon.com/cw/roundly)

## Want this built into your product?

We integrate our packages into custom Laravel and AI builds. Tell us what you're working on and we'll reply within 48 hours.

[Get a quote in 48 hours](https://roundly-consulting.com/contact.md) [Browse all packages](https://roundly-consulting.com/open-source/docs/sluggable-for-laravel.md)