ldc-crm/app/Http/Controllers/Api/V4/AnswerController.php

<?php

namespace App\Http\Controllers\Api\V4;

use App\Http\Controllers\Controller;
use App\Http\Requests\Api\V4\StoreCustomerAnswers;
use App\Models\Customer;
use App\Models\ModelAnswer;
use App\Models\Question;

class AnswerController extends Controller
{
    /**
     * Store the customer answers.
     *
     * @param \App\Http\Requests\Api\V4\StoreCustomerAnswers $request
     * @param \App\Models\Customer                           $customer
     * @return \Illuminate\Http\JsonResponse
     */
    public function storeCustomerAnswers(
        StoreCustomerAnswers $request,
        Customer $customer
    ): \Illuminate\Http\JsonResponse {
        // * Make sure we are accessing a customer that belongs to our service.
        $this->authorize('customerBelongsToService', $customer);

        $question = Question::find($request->validated('question'));

        // Column model_id is varchar because of singleoptin uuid, so force cast in string.
        ModelAnswer::query()
            ->where('model_type', Customer::class)
            ->where('model_id', (string) $customer->getKey())
            ->whereIn('answer_id', $question->answers->modelKeys())
            ->delete();

        foreach ($request->validated('answers') as $answerId) {
            ModelAnswer::create([
                'model_type' => Customer::class,
                'model_id'   => (string) $customer->getKey(),
                'answer_id'  => $answerId,
            ]);
        }

        return response()->json();
    }
}