Get database records in TYPO3 viewHelper - sql

Question

I want to create a database query in a view helper, this works with the following code:
$uid = 11;
$queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable('tx_test_domain_model_author');
$query = $queryBuilder
->select('*')
->addSelectLiteral(
$queryBuilder->expr()->count('tx_test_domain_model_author.author', 'counter')
)
->from('tx_test_domain_model_author')
->join(
'tx_test_domain_model_author',
'tx_test_publication_author_mm',
'tx_test_publication_author_mm',
$queryBuilder->expr()->eq(
'tx_test_domain_model_author.uid',
$queryBuilder->quoteIdentifier('tx_test_publication_author_mm.uid_foreign')
)
)
->where(
$queryBuilder->expr()->eq(
'tx_test_publication_author_mm.uid_local',
$queryBuilder->createNamedParameter($uid, \PDO::PARAM_INT)
)
)
->orderBy('tx_test_domain_model_author.uid', 'ASC');
$result = $query->execute();
$res = [];
while ($row = $result->fetch()) {
$res[] = $row;
}
print_r($res);
However, I only get one record, although the counter tells me it would be 3.
What am I doing wrong?

Answer 1

If the counter says its three items, then try change this:
$result = $query->execute();
$res = [];
while ($row = $result->fetch()) {
$res[] = $row;
}
into this:
$result = $query->execute()->fetchAll();
That fetches all rows into an array that you walk throug with:
foreach($result as $row){
...
}

Answer 2

It seems the QueryBuilder works differently, this gives me one result namely the first entry in the table:
$queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable('tx_test_publication_author_mm');
$query = $queryBuilder
->select('*')
->from('tx_test_publication_author_mm');
$result = $query->execute()->fetchAll();
foreach($result as $row){
echo $row['field'];;
}
This gives me all results:
$db = mysqli_connect($dbHost, $dbUser, $dbPassword, $dbName) or die (mysql_error ());
$sql = "SELECT * FROM tx_test_publication_author_mm";
foreach ($db->query($sql) as $row) {
echo $row['field'];
}