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# Nova - Resources/Validation *Source: https://nova.laravel.com/docs/v5/resources/validation* --- - [Community](https://discord.com/invite/laravel) - [Blog](https://blog.laravel.com) ##### Get Started - [Installation](/docs/v5/installation) - [Release Notes](/docs/v5/releases) - [Upgrade Guide](/docs/v5/upgrade) ##### Resources - [The Basics](/docs/v5/resources/the-basics) - [Fields](/docs/v5/resources/fields) - [Dependent Fields](/docs/v5/resources/dependent-fields) - [Date Fields](/docs/v5/resources/date-fields) - [File Fields](/docs/v5/resources/file-fields) - [Repeater Fields](/docs/v5/resources/repeater-fields) - [Field Panels](/docs/v5/resources/panels) - [Relationships](/docs/v5/resources/relationships) - [Validation](/docs/v5/resources/validation) - [Authorization](/docs/v5/resources/authorization) ##### Search - [The Basics](/docs/v5/search/the-basics) - [Global Search](/docs/v5/search/global-search) - [Scout Integration](/docs/v5/search/scout-integration) ##### Filters - [Defining Filters](/docs/v5/filters/defining-filters) - [Registering Filters](/docs/v5/filters/registering-filters) ##### Lenses - [Defining Lenses](/docs/v5/lenses/defining-lenses) - [Registering Lenses](/docs/v5/lenses/registering-lenses) ##### Actions - [Defining Actions](/docs/v5/actions/defining-actions) - [Registering Actions](/docs/v5/actions/registering-actions) ##### Metrics - [Defining Metrics](/docs/v5/metrics/defining-metrics) - [Registering Metrics](/docs/v5/metrics/registering-metrics) ##### Digging Deeper - [Dashboards](/docs/v5/customization/dashboards) - [Menus](/docs/v5/customization/menus) - [Notifications](/docs/v5/customization/notifications) - [Authentication](/docs/v5/customization/authentication) - [Impersonation](/docs/v5/customization/impersonation) - [Tools](/docs/v5/customization/tools) - [Resource Tools](/docs/v5/customization/resource-tools) - [Cards](/docs/v5/customization/cards) - [Fields](/docs/v5/customization/fields) - [Filters](/docs/v5/customization/filters) - [CSS / JavaScript](/docs/v5/customization/frontend) - [Assets](/docs/v5/customization/assets) - [Localization](/docs/v5/customization/localization) - [Stubs](/docs/v5/customization/stubs) On this page - [Rules](#rules) - [Attaching Rules](#attaching-rules) - [Creation Rules](#creation-rules) - [Update Rules](#update-rules) - [After Validation Hooks](#after-validation-hooks) - [The afterValidation Method](#the-aftervalidation-method) - [The afterCreationValidation Method](#the-aftercreationvalidation-method) - [The afterUpdateValidation Method](#the-afterupdatevalidation-method) Resources # Validation Nova provides a variety of ways to validate your resource fields. Unless you like to live dangerously, any Nova fields that are displayed on the Nova creation / update pages will need some validation. Thankfully, it’s a cinch to attach all of the Laravel validation rules you’re familiar with to your Nova resource fields. Let’s get started. ## [​](#rules) Rules ### [​](#attaching-rules) Attaching Rules When defining a field on a resource, you may use the `rules` method to attach [validation rules](https://laravel.com/docs/validation#available-validation-rules) to the field: app/Nova/~Resource.php Copy Ask AI ``` use Laravel\Nova\Fields\Text; use Laravel\Nova\Http\Requests\NovaRequest; // ... /** * Get the fields displayed by the resource. * * @return array<int, \Laravel\Nova\Fields\Field> */ public function fields(NovaRequest $request): array { return [ Text::make('Name') ->sortable() ->rules('required', 'max:255'), ]; } ``` Of course, if you are leveraging Laravel’s support for [validation rule objects](https://laravel.com/docs/validation#using-rule-objects), you may attach those to resources as well: Copy Ask AI ``` use App\Rules\ValidState; use Laravel\Nova\Fields\Text; // ... Text::make('State') ->sortable() ->rules('required', new ValidState), ``` You may also provide rules to the `rules` method via an array or Closure: Copy Ask AI ``` use App\Rules\ValidState; use Laravel\Nova\Fields\Text; // ... // Using an array... Text::make('State')->rules(['required', new ValidState]), // Using a Closure... Text::make('State')->rules(fn ($request) => [ 'required', new ValidState(), ]); ``` Additionally, you may use [custom closure rules](https://laravel.com/docs/validation#using-closures) to validate your resource fields: Copy Ask AI ``` use Laravel\Nova\Fields\Text; // ... Text::make('State') ->sortable() ->rules('required', function($attribute, $value, $fail) { if (strtoupper($value) !== $value) { return $fail('The '.$attribute.' field must be uppercase.'); } }), ``` ### [​](#creation-rules) Creation Rules If you would like to define rules that only apply when a resource is being created, you may use the `creationRules` method: Copy Ask AI ``` use Laravel\Nova\Fields\Text; // ... Text::make('Email') ->sortable() ->rules('required', 'email', 'max:255') ->creationRules('unique:users,email'), ``` ### [​](#update-rules) Update Rules Likewise, if you would like to define rules that only apply when a resource is being updated, you may use the `updateRules` method. If necessary, you may use `resourceId` place-holder within your rule definition. This place-holder will automatically be replaced with the primary key of the resource being updated: Copy Ask AI ``` use Laravel\Nova\Fields\Text; // ... Text::make('Email') ->sortable() ->rules('required', 'email', 'max:255') ->creationRules('unique:users,email') ->updateRules('unique:users,email,{{resourceId}}'), ``` ## [​](#after-validation-hooks) After Validation Hooks Nova also provides several methods that allow you to perform tasks after a resource has been validated, providing the opportunity to perform more custom validation before the resource is persisted to the database: - [`afterValidation`](#after-validation-method) - [`afterCreationValidation`](#after-creation-validation-method) - [`afterUpdateValidation`](#after-update-validation-method) #### [​](#the-aftervalidation-method) The `afterValidation` Method The `afterValidation` method will always be called after a resource has been validated during its creation or during an update. This method will be called before calling `afterCreationValidation` or `afterUpdateValidation`: app/Nova/~Resource.php Copy Ask AI ``` use Illuminate\Contracts\Validation\Validator as ValidatorContract; use Laravel\Nova\Http\Requests\NovaRequest; // ... /** * Handle any post-validation processing. * * @return void */ protected static function afterValidation( NovaRequest $request, ValidatorContract $validator ) { if (self::somethingElseIsInvalid()) { $validator->errors()->add('field', 'Something is wrong with this field!'); } } ``` #### [​](#the-aftercreationvalidation-method) The `afterCreationValidation` Method The `afterCreationValidation` method will be called after a resource that is being created has been validated: app/Nova/~Resource.php Copy Ask AI ``` use Illuminate\Contracts\Validation\Validator as ValidatorContract; use Laravel\Nova\Http\Requests\NovaRequest; // ... /** * Handle any post-creation validation processing. * * @return void */ protected static function afterCreationValidation( NovaRequest $request, ValidatorContract $validator ) { if (self::somethingElseIsInvalid()) { $validator->errors()->add('field', 'Something is wrong with this field!'); } } ``` #### [​](#the-afterupdatevalidation-method) The `afterUpdateValidation` Method The `afterUpdateValidation` method will be called after a resource that is being updated has been validated: app/Nova/~Resource.php Copy Ask AI ``` use Illuminate\Contracts\Validation\Validator as ValidatorContract; use Laravel\Nova\Http\Requests\NovaRequest; // ... /** * Handle any post-update validation processing. * * @return void */ protected static function afterUpdateValidation( NovaRequest $request, ValidatorContract $validator ) { if (self::somethingElseIsInvalid()) { $validator->errors()->add('field', 'Something is wrong with this field!'); } } ``` Was this page helpful? 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