Как запретить пользователю вступать еще раз ?

 
 
 
<?php
 
class actionTournamentJoin extends cmsAction {
 
	public function run($tournament_id){
 
		if (!$tournament_id) { cmsCore::error404(); }
 
		$tournament = $this->model->getTournament($tournament_id);
 
		if (!$tournament || $tournament['status'] != tournament::STATUS_PENDING) { 
			cmsCore::error404();
		}
		if(cmsUser::get('tournament_id')){
        cmsUser::addSessionMessage('Вы уже в команде', 'error');
        $this->redirectBack();  -***********Вот код
		}
 
		$user = cmsUser::getInstance();
		$is_user_in_tournament = $user->is_admin ? false : $is_max;
 
		if ($is_user_in_tournament){
			cmsCore::error404();
		}
 
		$errors = false;
 
		$form = $this->getForm('join');
 
		$is_submitted = $this->request->has('submit');
 
		$team = $form->parse($this->request, $is_submitted);
 
		$user = cmsUser::getInstance();
 
 
		if ($is_submitted){
 
			$errors = $form->validate($this, $team);
 
			if (!$errors){
 
				$team['tournament_id'] = $tournament_id;
				$team['user_id'] = $user->id;
				$this->model->addTeam($team);	
 
				$tournament = $this->model->getTournament($tournament_id);
 
				if ($tournament['users_count'] >= $tournament['min_users']){
 
					$this->model->setTournamentStatus($tournament_id, tournament::STATUS_MODERATION);
 
 
				}
 
 
				$this->redirectToAction('event', array($tournament_id));	
			}
 
			if ($errors){
				cmsUser::addSessionMessage(LANG_FORM_ERRORS, 'error');
			}
 
		}
 
		$template = cmsTemplate::getInstance();
 
		$template->render('form_join', array(
			'form' => $form,
			'errors' => $errors,
			'team' => $team,
			'tournament' => $tournament
		));
 
	}
 
}