public function getDescriptions($number = 0)
    {
        $dql = <<<DQL
\t\tSELECT 
\t\t\ta 
\t\tFROM 
\t\t\t\\Account\\Entity\\Account a
\t\tWHERE 
\t\t\ta.active = 1
\t\tORDER BY a.description ASC
DQL;
        $query = $this->getEntityManager()->createQuery($dql);
        if ($number) {
            $query->setMaxResults($number);
        }
        $query->useQueryCache(true);
        $query->useResultCache(true, 3600, self::CACHE_PREFIX . md5($dql));
        $results = $query->getResult();
        $no_account = new \Account\Entity\Account();
        $no_account->setDescription('Unassigned');
        $no_account->setId('none');
        $accounts = ['none' => $no_account];
        foreach ($results as $result) {
            $accounts[$result->getDescription()] = $result;
        }
        return $accounts;
    }