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# Nova - Resources/Dependent-Fields *Source: https://nova.laravel.com/docs/v5/resources/dependent-fields* --- - [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 - [Supported Dependent Fields](#supported-dependent-fields) - [Toggling Field Visibility Using dependsOn](#toggling-field-visibility-using-dependson) - [Setting a Field’s Value Using dependsOn](#setting-a-field%E2%80%99s-value-using-dependson) - [Accessing Request Resource IDs](#accessing-request-resource-ids) Resources # Dependent Fields Dependent fields allow you to define fields that have unique configuration depending on the value of other fields. Dependent fields are created by invoking the `dependsOn` method when defining a field. The `dependsOn` method accepts an `array` of dependent field attributes and a closure that modifies the configuration of the current field instance. Dependent fields allow advanced customization, such as toggling read-only mode, validation rules, and more based on the state of another field: Copy Ask AI ``` use Laravel\Nova\Fields\FormData; use Laravel\Nova\Fields\Select; use Laravel\Nova\Fields\Text; use Laravel\Nova\Http\Requests\NovaRequest; // ... return [ Select::make('Purchase Type', 'type') ->options([ 'personal' => 'Personal', 'gift' => 'Gift', ]), // Recipient field configuration is customized based on purchase type... Text::make('Recipient') ->readonly() ->dependsOn( ['type'], function (Text $field, NovaRequest $request, FormData $formData) { if ($formData->type === 'gift') { $field->readonly(false)->rules(['required', 'email']); } } ), ]; ``` To define dependent fields separately for creating and updating resources, you may use the `dependsOnCreating` and `dependsOnUpdating` methods. ## [​](#supported-dependent-fields) Supported Dependent Fields The following field types may depend on other fields: - Audio - BelongsTo - Boolean - BooleanGroup - Color - Code - Country - Currency - Date - DateTime - File - Heading - Hidden - Image - KeyValue - Markdown - MorphTo - Number - Password - PasswordConfirmation - Select - Status - Textarea - Text - Timezone - Trix - URL - VaporAudio - VaporFile - VaporImage The following field types may not be depended upon by other fields since they do not live-report their changes to Nova: - Audio - Code - File - Image - KeyValue - Status - Tag - Trix - VaporAudio - VaporFile - VaporImage ## [​](#toggling-field-visibility-using-dependson) Toggling Field Visibility Using `dependsOn` One common use-case for dependent fields is toggling field visibility based on the value of another field. You can accomplish this using the `hide` and `show` methods: Copy Ask AI ``` use Laravel\Nova\Fields\Boolean; use Laravel\Nova\Fields\BelongsTo; use Laravel\Nova\Fields\FormData; use Laravel\Nova\Http\Requests\NovaRequest; // ... Boolean::make('Anonymous Comment', 'anonymous') ->onlyOnForms() ->fillUsing(fn () => null) ->default(true), BelongsTo::make('User') ->hide() ->rules('sometimes') ->dependsOn('anonymous', function (BelongsTo $field, NovaRequest $request, FormData $formData) { if ($formData->boolean('anonymous') === false) { $field->show()->rules('required'); } }), ``` ## [​](#setting-a-field’s-value-using-dependson) Setting a Field’s Value Using `dependsOn` Another common use-case for dependent fields is to set the value of a field based on the value of another field. You can accomplish this using the `setValue` method: Copy Ask AI ``` use Laravel\Nova\Fields\DateTime; use Laravel\Nova\Fields\FormData; use Laravel\Nova\Http\Requests\NovaRequest; // ... DateTime::make('Created At'), DateTime::make('Updated At') ->dependsOn(['created_at'], function (DateTime $field, NovaRequest $request, FormData $form) { $field->setValue(Carbon::parse($form->created_at)->addDays(7)); }), ``` ## [​](#accessing-request-resource-ids) Accessing Request Resource IDs When interacting with dependent fields, you may retrieve the current resource and related resource IDs via the `resource` method: Copy Ask AI ``` BelongsTo::make(__('Books'), 'books', Book::class), Currency::make('Price') ->dependsOn('books', function (Currency $field, NovaRequest $request, FormData $formData) { $bookId = (int) $formData->resource(Book::uriKey(), $formData->books); if ($bookId == 1) { $field->rules([ 'required', 'numeric', 'min:10', 'max:199' ])->help('Price starts from $10-$199'); return; } $field->rules([ 'required', 'numeric', 'min:0', 'max:99' ])->help('Price starts from $0-$99'); }), ``` Was this page helpful? 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