/**
     * Get MySQL filter criteria for rezervations list
     * 
     * @return string filter criteria in MySQL format
     */
    function buildContentWhere()
    {
        $where = array();
        $this->addStringProperty($where, 'reservation-surname', 'items-subject_title');
        $this->addIntProperty($where, 'customer-id');
        $this->addTimeLimit($where, 'from', 'to');
        $this->addMultipleProperty($where, 'reservation-state');
        $this->addMultipleProperty($where, 'reservation-paid');
        return $this->getWhere($where);
    }
 

 
/**
     * Get MySQL filter criteria for rezervations list
     * 
     * @return string filter criteria in MySQL format
     */
    function buildContentWhere()
    {
        $where = array();
        $this->addStringProperty($where, 'reservation-surname', 'items-subject_title');
        $this->addIntProperty($where, 'customer-id');
        $this->addTimeLimit($where, 'from', 'to');
        $this->addMultipleProperty($where, 'reservation-state');
        $this->addMultipleProperty($where, 'paid');
        return $this->getWhere($where);
    }