/**
* Helper for {@see listVersions()} and {@see listVersionsForUser()} that filters duplicates
* that are the result of the cartesian product performed by createVersionInfoFindQuery()
*
* @param \ezcQuerySelect $query
* @return string[][]
*/
private function listVersionsHelper($query)
{
$query->orderBy($this->dbHandler->quoteColumn('id', 'ezcontentobject_version'));
$statement = $query->prepare();
$statement->execute();
$results = array();
$previousId = null;
foreach ($statement->fetchAll(\PDO::FETCH_ASSOC) as $row) {
if ($row["ezcontentobject_version_id"] == $previousId) {
continue;
}
$previousId = $row["ezcontentobject_version_id"];
$results[] = $row;
}
return $results;
}
/**
* Saves the ordered columns in an internal array so we can invert that order
* if we need to in the limit() workaround
*
* @param string $column a column name in the result set
* @param string $type if the column should be sorted ascending or descending.
* you can specify this using ezcQuerySelect::ASC or ezcQuerySelect::DESC
* @return ezcQuery a pointer to $this
*/
public function orderBy($column, $type = self::ASC)
{
if ($this->invertedOrderString) {
$this->invertedOrderString .= ', ';
} else {
$this->invertedOrderString = 'ORDER BY ';
}
$this->invertedOrderString .= $column . ' ' . ($type == self::ASC ? self::DESC : self::ASC);
return parent::orderBy($column, $type);
}