'require|max:26|graph', ]); $params = request()->only(['username']); if (!$validate->check($params)) { return msg('error', $validate->getError()); } if (\app\model\User::getByUsername($params['username'])->isExists()) { return msg('error', '该用户名已存在'); } $model = get_user(); $model->username = trim($params['username']); $model->allowField(['username'])->save(); return msg('ok', 'success', $model); } }