Problème d'ajout à la BDD si règle de validation : checkUnique

Salut, je suis nouvelle sur ce Forum.
Je suis en train de développer une appli cake-php de gestion d'événements.
Dans la partie ''Ajouter Ticket'' j'ai ajouté une règle de validation pour que le nom du ticket sois unique pour un événement. Sauf que une fois ajoutée, si je rentre un nom de ticket autre que ceux qui existent déjà les valeurs ne s'ajoutent pas à ma BDD.
TABLE ticket_types : (id,event_id,name,quantity,max_tickets_user,created,modified,status,start,end)
===>L'ajout d'un ticket sans appliquer la règle de validation marche très bien.
*******Voici mon Modèle*******

<?php
class TicketType extends AppModel {
        //var $name = 'TicketType';
    public $actsAs = array('Containable');
        public $belongsTo = 'Event';
        public $hasMany = array(
            'Ticket',
            'Discount',
            'FreeTicket' => array('dependent' => true),
            'PaidTicket' => array('dependent' => true)
            ) ;

    //règle de validation personnalisée
        public function checkUnique($check) {
            $count = $this->find('count', array('conditions' => array('TicketType.event_id' => $this->data'TicketType']'event_id'], 'TicketType.name' => $this->data'TicketType']'name'])));
            if($count)
                return false;
            return true;
        }
    public $validate = array(
        'name' =>
                    array(
                        "rule" => "checkUnique",
                       "message" => "A ticket with that name already exists for this event"
            ) 
    );

    public function beforeFind($query) {
        parent::beforeFind($query);
        $tickets = $this->find('all', array('callbacks' => false));
        if ($tickets) {
            foreach ($tickets as $key => $ticket) {
                $this->id = $ticket'TicketType']'id'];
                if ($this->exists()) {
                    $this->updateStatus();
                } else {
                    throw new NotFoundException();
                }
            }
        }                       
    }

    public function addTicketType($data) {
        $this->create();
        if($this->save($data'TicketType'], false)){ // test sur la création du ticket (isUnique)
        if (in_array($data'type'], array('F', 'P'))) {
            if ($data'type'] == 'F') {
                $this->FreeTicket = ClassRegistry::init('FreeTicket');
                $this->FreeTicket->create();
                return $this->FreeTicket->save(array('ticket_type_id' => $this->id, 'has_form' => $data'FreeTicket']'has_form']));
            } elseif ($data'type'] == 'P') {
                $this->Fee = ClassRegistry::init('Fee');
                $fee = $this->Fee->findById($data'PaidTicket']'fee_id']);
                $total_buyer = $data'PaidTicket']'price'];
                if ($fee'Fee']'type'] == 'pass') {
                    $total_buyer = $data'PaidTicket']'price'] + (($data'PaidTicket']'price'] * $fee'Fee']'value']) + 10);
                }               
                $this->PaidTicket = ClassRegistry::init('PaidTicket');
                $this->PaidTicket->create();
                return $this->PaidTicket->save(array('ticket_type_id' => $this->id, 'fee_id' => $data'PaidTicket']'fee_id'], 'price' => $data'PaidTicket']'price'], 'total_buyer' => $total_buyer));
            }
            return false;
        }
    }
    }
    public function removeTicketType() {
        if ($this->exists()) {
            return $this->delete();
        }
        return false;
    }
    public function reserveTicketTypeQuantity($requestType, $qty = 1) {
        if (in_array($requestType, array('block', 'unblock'))) {
            if ($requestType == 'block') {              
                if ($this->checkDates()) {
                    $data = $this->read();
                    if (($data'TicketType']'quantity'] > 0) && ($data'TicketType']'quantity'] >= $qty)) {
                        $this->saveField('quantity', $data'TicketType']'quantity'] - $qty);
                        $data'TicketType']'quantity'] = $qty; //decrement available quantity in DB
                        return $data;
                    }
                }
            }
            if ($requestType == 'unblock') {
                $ticket_qty = $this->read(array('quantity'));
                $ticket_qty'TicketType']'quantity'] += $qty; 
                return $this->saveField('quantity', $ticket_qty'TicketType']'quantity']);
            }
        }
        return false;
    }
    public function checkQuantity($userId, $qty = 0) {
        $this->Ticket = ClassRegistry::init('Ticket');
        $max = $this->read()'TicketType']'max_tickets_user'];
        $userNb = $this->Ticket->numberTicketsAcquiredByUser($userId, $this->id);
        $remain = $max - $userNb;
        if ($qty == 0) {
            return ($remain) > 0 ? $remain : 0;
        }
        if (($userNb + $qty > $max) || ($qty > $max)) {
            return false;
        }
        return $remain - $qty;
    }
    public function checkDates() {
        $t = time();        
        $this->data = $this->read(array('start', 'end'));
        return ((time() >= strtotime($this->data'TicketType']'start'], $t)) 
            && (time() <= strtotime($this->data'TicketType']'end'], $t)));          
    }

    public function updateStatus() {
        if ($this->data = $this->find('first', array('conditions' => array('TicketType.id' => $this->id), 'callbacks' => false))) {
            $t = time();
            if ($t > strtotime($this->data'TicketType']'end'], $t)) {
                return $this->saveField('status', 'ended', array('callbacks' => false));
            } elseif ($t < strtotime($this->data'TicketType']'start'], $t)) {
                return $this->saveField('status', 'upComing', array('callbacks' => false));
            } else {
                if ($this->data'TicketType']'quantity'] > 0) {
                    return $this->saveField('status', 'onSale', array('callbacks' => false));
                } else {
                    return $this->saveField('status', 'soldOut', array('callbacks' => false));
                }
            }
        }       
        return false;       
    }
}
?>

*****Dans le contrôleur****

public function add($eventId) {
        if ($this->request->data) {
            $this->request->data'TicketType']'event_id'] = $eventId;
            if (!$this->TicketType->save($this->request->data)) {
                $this->Session->setFlash(__('Erreur lors de la création du ticket'), 'default', array('class' => 'alert alert-danger'));
            }       
            return $this->redirect(array('action' => 'index', $eventId));
        }
    }

==MERCI