kknongchang_2506/app/Module/User/Validator/UsernameNtValidator.php

<?php

namespace App\Module\User\Validator;

use App\Module\User\Models\User;
use UCore\Validator;



/**
 * 用户名重复检测,存在false
 * 不存在true
 *
 */
class UsernameNtValidator extends Validator
{

    public function validate($value, array $data): bool
    {
        $user = User::query()->where('username','=',$value)->first();
        if ($user) {
            $this->validation->user = $user;
            return false;
        }

        return true;
    }

}