ldc-crm/app/Http/Requests/Api/V4/StoreCustomerAnswers.php

<?php

namespace App\Http\Requests\Api\V4;

use App\Models\Answer;
use App\Models\Question;
use App\Models\Service;

class StoreCustomerAnswers extends BaseApiRequest
{
    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules(): array
    {
        // * Resolve Service.
        $service           = app()->make(Service::class);
        $brandId           = $service->brand->id;
        $question          = Question::query()->findOrFail($this->question);
        $questionTableName = (new Question())->getTable();
        $answerTableName   = (new Answer())->getTable();
        return [
            'question'  => [
                'required',
                "exists:$questionTableName,id",
                // phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.FoundBeforeLastUsed
                function ($attribute, $value, $fail) use ($question, $brandId) {
                    if ($question->brand->id !== $brandId) {
                        $fail("$attribute does not belong to brand $brandId");
                    }
                }
            ],
            'answers'   => 'required|array',
            'answers.*' => [
                'int',
                'distinct',
                "exists:$answerTableName,id",
                function ($attribute, $value, $fail) use ($question) {
                    if (Answer::query()->findOrFail($value)->question->id !== $question->id) {
                        $fail("$attribute does not belong to question $question->id");
                    }
                }
            ]
        ];
    }
}