public function lookupStoreIds($templateId)
    {
        $adapter = $this->getConnection();
        $select = $adapter->select()->from(
            $this->getTable('eadesign_pdf_store'),
            'store_id'
        )->where(
            'template_id = ?',
            (int)$templateId
        );

        return $adapter->fetchCol($select);
    }