/**
  *
  * @author DuongNQ
  * @return array null
  * @param \Subject\Model\Subject\Category $cate
  */
 public function save($cate)
 {
     $data = array('name' => $cate->getName(), 'description' => $cate->getDescription() ?: null, 'createdById' => $cate->getCreatedById(), 'createdDateTime' => $cate->getCreatedDateTime(), 'status' => $cate->getStatus());
     /* @var $dbAdapter \Zend\Db\Adapter\Adapter */
     $dbAdapter = $this->getServiceLocator()->get('dbAdapter');
     /* @var $dbSql \Zend\Db\Sql\Sql */
     $dbSql = $this->getServiceLocator()->get('dbSql');
     if (!$cate->getId()) {
         $insert = $this->getDbSql()->insert(self::TABLE_NAME);
         $insert->values($data);
         $query = $dbSql->buildSqlString($insert);
         /* @var $results \Zend\Db\Adapter\Driver\Pdo\Result */
         $results = $dbAdapter->query($query, $dbAdapter::QUERY_MODE_EXECUTE);
         $cate->setId($results->getGeneratedValue());
     } else {
         $update = $this->getDbSql()->update(self::TABLE_NAME);
         $update->set($data);
         $update->where(['id' => (int) $cate->getId()]);
         $query = $dbSql->buildSqlString($update);
         $results = $dbAdapter->query($query, $dbAdapter::QUERY_MODE_EXECUTE);
     }
     return $results;
 }