Why calling custom rule in livewire app raised error?

Question

In laravel 11 / livewire 3.5 app Icreated a custom rule with command :

php artisan make:rule   LocationIsValidRule

and having a file with declaration :

<?php

namespace App\Rules;

use App\Library\Services\Interfaces\GetGeoLocationInterface;
use Closure;
use Illuminate\Contracts\Validation\ValidationRule;

class LocationIsValidRule implements ValidationRule
{
    public function validate(string $attribute, mixed $value, Closure $fail): void
    {
        // geo location with spatie package would be run if location string is valid.
        ...

I use it in livewire component :

class MyComponent extends Component
{

    ...

    protected function rules()
    {
        return [
            'title' => [
                'required',
                ...
            ],


            'location' => [
                'required',
                'string',
                'min:3',
                'max:100',
                [new LocationIsValidRule()],
            ],

        ];
    }

But on validation I got error :

trim(): Argument #1 ($string) must be of type string, 
App\Rules\LocationIsValidRule given

and pointing to:

$this->validate();

line of store method.

I read docs at https://livewire.laravel.com/docs/validation#using-custom-validators , but looks it is somewhat different case>

How have I to call custom validation in livewire app ?

UPDATED :

Not sure if command

php artisan make:rule  

valid in this case, Which format must have custom validation rule in livewire ?

Answer 1

You should remove the square brackets around the custom rule

'location' => [
  'required',
  'string',
  'min:3',
  'max:100',
  new LocationIsValidRule(),
],

See https://laravel.com/docs/11.x/validation#custom-validation-rules