invoiceninja/app/Http/Requests/Vendor/StoreVendorRequest.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2020. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Http\Requests\Vendor;

use App\DataMapper\VendorSettings;
use App\Http\Requests\Request;
use App\Http\ValidationRules\ValidVendorGroupSettingsRule;
use App\Models\Vendor;
use App\Utils\Traits\MakesHash;
use Illuminate\Support\Facades\Log;
use Illuminate\Validation\Rule;

class StoreVendorRequest extends Request
{
    use MakesHash;

    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize() : bool
    {
        return auth()->user()->can('create', Vendor::class);
    }

    public function rules()
    {

        /* Ensure we have a client name, and that all emails are unique*/
        //$rules['name'] = 'required|min:1';
        $rules['id_number'] = 'unique:vendors,id_number,'.$this->id.',id,company_id,'.$this->company_id;
        //$rules['settings'] = new ValidVendorGroupSettingsRule();
        $rules['contacts.*.email'] = 'nullable|distinct';


        return $rules;
    }

    protected function prepareForValidation()
    {
        $input = $this->all();

        if (array_key_exists('assigned_user_id', $input) && is_string($input['assigned_user_id'])) {
            $input['assigned_user_id'] = $this->decodePrimaryKey($input['assigned_user_id']);
        }
        
        $this->replace($input);
    }

    public function messages()
    {
        return [
            'unique' => ctrans('validation.unique', ['attribute' => 'email']),
            //'required' => trans('validation.required', ['attribute' => 'email']),
            'contacts.*.email.required' => ctrans('validation.email', ['attribute' => 'email']),
        ];
    }
}