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

<?php

namespace App\Module\User\Validator;

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



/**
 * 用户名检测,存在
 *
 */
class Username extends Validator
{

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

        return false;
    }

}