sam-api/app/Http/Requests/Api/V1/ModelFormula/IndexModelFormulaRequest.php

<?php

namespace App\Http\Requests\Api\V1\ModelFormula;

use App\Http\Requests\Api\V1\PaginateRequest;

class IndexModelFormulaRequest extends PaginateRequest
{
    /**
     * Get the validation rules that apply to the request.
     */
    public function rules(): array
    {
        return array_merge(parent::rules(), [
            'search' => ['sometimes', 'string', 'max:255'],
            'target_parameter' => ['sometimes', 'string', 'max:50'],
        ]);
    }

    /**
     * Get custom attribute names for validator errors.
     */
    public function attributes(): array
    {
        return array_merge(parent::attributes(), [
            'search' => __('validation.attributes.search'),
            'target_parameter' => __('validation.attributes.target_parameter'),
        ]);
    }
}