ldc-mesbr-app/app/Http/Requests/Customers/UpdateRequest.php

<?php

namespace App\Http\Requests\Customers;

use App\Http\Resources\StatusResource;
use Illuminate\Contracts\Validation\Validator;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Http\Exceptions\HttpResponseException;

class UpdateRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        $customer = $this->route('customer');
        return [
            'email' => "email|unique:customers,email," . $customer->crm_id . ",crm_id|required",
            'country' => 'string|required'
        ];
    }

    protected function failedValidation(Validator $validator)
    {
        if ($this->wantsJson()) {
            throw new HttpResponseException(response()->json(new StatusResource([
                'status' => 'KO',
                'code' => 422,
                'message' => $validator->errors()->messages()
            ]), 422));
        }
    }
}