Selected option from relation doesn't get passed to action callback in custom modal

[webmasterlv]

Package

filament/filament

Package Version

v3.2.50

Laravel Version

v10.48.3

Livewire Version

v3.4.9.

PHP Version

8.2

Problem description

I want to create button in the top header of the Resource. I added new action in getHeaderActions() of the ListRecords class. There is a textarea and a dropdown. The dropdown is of Forms\Components\Select and configured to use relationship:

Action::make('AddRelation')
    ->form([
        Forms\Components\Textarea::make('text')
            ->required(),

        Forms\Components\Select::make('relation_id')
            ->relationship('relationship', 'name')
            ->preload()
            ->multiple()
            ->maxItems(1)
    ])
    ->action(function (array $data): void {
        //`text` is here, but `relation_id` is not.
        dd($data);
})

Expected behavior

action() should receive all user entered form data regardless of the input type.

Steps to reproduce

• Setup environmet
• composer install
• php artisan migrate
• php artisan db:seed
• php artisan make:filament-user - create user as requested
• Log into panel, navigate to "Relations"
• Click on "Add test"
• Fill the form and submit. You can see that there only will be data from textarea.

Reproduction repository

https://github.com/webmasterlv/filament-test.git

Relevant log output

No response

[danharrin]

Form components using relationship() are designed not to dehydrate into $data so that you can save that data to the main model out of the box. When calling ->saveRelationships() or when your action is associated with a record, it will save the data for you.

If you add ->dehydrated() onto that Select after ->relationship(), it should work.