SELECT (COUNT(*)) query in ZF2 - php

Question

I'm trying to execute SQL query with table gateway which contain COUNT(*) expression in ZF2. This is function in my model:
public function brKomentariUred(){
$sql = $this->tableGateway->getSql();
$select = $sql->select();
$select->columns(array('brKomentari' => new \Zend\Db\Sql\Expression('count(komentarID)'), 'uredId' => 'ured'));
$select->group('ured');
//echo $sql->getSqlStringForSqlObject($select); die();
return $this->tableGateway->selectWith($select);
}
When the query is printed it is correct
SELECT count(komentarID) AS `brKomentari`, `komentar`.`ured` AS `uredId` FROM `komentar` GROUP BY `ured`
In the controller I'm trying to call the query with this code
foreach($this->getKomentarTable()->brKomentariUred() as $r){
$arr = $this->object_to_array($r);
print_r($arr);
}
It doesn't return number of elements and devicesID as it is written in SELECT, but return as SELECT * FROM komentar, but with no values. Is this right code or I'm making some error in my code? Other queries are OK.
Thanks in advance for your help.

Answer 1

In your place I would do the following steps:
replace the expression object with new \Zend\Db\Sql\Expression('COUNT(komentarID)')
I wouldn't use an alias in group by operator, it may not work. So,
replace this $select->group('ured') with
$select->group('komentar.ured')
Also, the result processing should be simplified:
$resultSet = $this->getKomentarTable()->brKomentariUred();
print_r($resultSet->toArray());