Fetch values of aggregated columns in Propel - symfony1

Question

I am trying to make following query in Propel:
$criteria = new Criteria();
$criteria->clearSelectColumns();
$criteria->addSelectColumn(TableName::COLUMN1)
->addSelectColumn(TableName::COLUMN2)
->addAsColumn('alias1', 'DATE('.TableName::INIT_TIME.')')
->addAsColumn('alias2', 'COUNT('.TableName::DOWNLOAD_START_TIME.')')
->addGroupByColumn('DATE('.TableName::INIT_TIME.')')
->addGroupByColumn(TableName::DOWNLOAD_START_TIME);
$logs = TableName::doSelect($criteria);
It seems that everything OK and according to MySQL log file query generated and saved to server right. However I cannot get values of aggregated columns.
doSelect returns array of TableName objects which have no methods to fetch aggregated columns. So, how can I do it?
PS: I am talking about symfony 1.4 with Propel if it matters.

Answer 1

You should avoid the use of Criteria, use the ModelCriteria API instead (documentation available at: http://www.propelorm.org/reference/model-criteria.html)
The following query:
<?php
$criteria = new Criteria();
$criteria->clearSelectColumns();
$criteria->addSelectColumn(TableName::COLUMN1)
->addSelectColumn(TableName::COLUMN2)
->addAsColumn('alias1', 'DATE('.TableName::INIT_TIME.')')
->addAsColumn('alias2', 'COUNT('.TableName::DOWNLOAD_START_TIME.')')
->addGroupByColumn('DATE('.TableName::INIT_TIME.')')
->addGroupByColumn(TableName::DOWNLOAD_START_TIME);
$logs = TableName::doSelect($criteria);
Can be rewritten as below:
$query = TableNameQuery::create()
->select(array('Column1', 'Column2'))
->withColumn('DATE(InitTime)', 'alias1')
->withColumn('COUNT(DownloadStartTime)', 'alias2')
->groupBy('alias1')
->groupByDownloadStartTime()
;
$logs = $query->find();
Note you won't select both columns alias1 and alias2 as you didn't add them to the selected columns in your code. You can do that by adding the two alias to the select() clause:
->select(array('Column1', 'Column2', 'alias1', 'alias2'))

Answer 2

I used this snippet to retrieve and fetch data when I followed this same approach, but selecting only one column in my criteria through addSelectColumn:
$logs = TableName::doSelectStmt($criteria);
$data = $logs->fetchAll(PDO::FETCH_COLUMN, 0);
I hope this can help you.

Answer 3

My method is to make a query and iterate through a recordset. As suggested I use FETCH_BOTH to get array positions, but names as well. I take those values and hydrate my object, but also manually populate the properties of the object that are meant to hold the aggregate values. I pass those objects back to my application and use them as normal objects would be used in my view.
$stmt = self::doSelectStmt($c);
// empty array for now
$results = array();
// lets iterate through this
while($row = $stmt->fetch(PDO::FETCH_BOTH)) {
// we need to create a new object
$division = new Division();
// and we'll hydrate each row turning into an object so we can use it easily
$division->hydrate($row);
// now here's the magic, this object did not exist from our tables, we'll fix that
$division->setNumPlayers($row['num_players']);
$division->setNumTeams($row['teams']);
// set the output object
$results[] = $division;
}
return $results; // array of objects including aggregate values