/**
* override parent class method, because we may want to specify a default sort
*
* @return xxx
*/
function get_sql_sort()
{
// if user has specified a sort column, use that
if ($sort = parent::get_sql_sort()) {
return $sort;
}
// if there is a "fullname" column, sort by first/last name
if ($this->has_column('fullname')) {
$sort = 'u.firstname, u.lastname';
if ($this->has_column('attempt')) {
$sort .= ', ha.attempt ASC';
}
return $sort;
}
// no sort column, and no "fullname" column
return '';
}
/**
* Get the SQL fragment to sort by.
*
* This is overridden to sort by timemodified and ID by default. Many items happen at the same time
* and a second sorting by ID is valuable to distinguish the order in which the history happened.
*
* @return string SQL fragment.
*/
public function get_sql_sort()
{
$columns = $this->get_sort_columns();
if (count($columns) == 1 && isset($columns['timemodified']) && $columns['timemodified'] == SORT_DESC) {
// Add the 'id' column when we are using the default sorting.
$columns['id'] = SORT_DESC;
return self::construct_order_by($columns);
}
return parent::get_sql_sort();
}
