eatvio-infra/app/Livewire/Profile/DescriptionForm.php

<?php

namespace App\Livewire\Profile;

use App\Models\User;
use App\Models\UserDetailz;
use Illuminate\Contracts\View\Factory as ViewFactory;
use Illuminate\Contracts\View\View;
use Livewire\Component;

class DescriptionForm extends Component
{
    public string $description = '';

    public User $user;

    public function mount(): void
    {
        $this->initDetailzIfNeeded();
        $this->description = $this->user->detailz->additional_info ?? '';
    }

    public function updatedDescription(string $value): void
    {
        $userDetailz = $this->user->detailz;

        $userDetailz->additional_info = $value;
        $userDetailz->save();
    }

    public function render(): View|ViewFactory
    {
        return view('livewire.profile.description-form');
    }

    private function initDetailzIfNeeded(): void
    {
        $curUserDetailez = UserDetailz::firstOrNew(
            ['user_id' => $this->user->id],
            [
                'about_alergy' => '',
                'about_taking_pils' => '',
                'about_sport_hobbies' => '',
                'favorite_foods' => '',
                'unfavorite_foods' => '',
                'additional_info' => '',
            ]
        );

        if (! isset($curUserDetailez->id)) {
            $curUserDetailez->save();
        }
    }
}