function _user_allowed($id)
{
global $DB;
if (isset($this->contexts['cluster']) && clusterassignment::exists(array(new field_filter('userid', $id), new in_list_filter('clusterid', $this->contexts['cluster'])))) {
return true;
}
if (isset($this->contexts['cluster'])) {
$filter = $this->get_filter('clusterid', 'cluster');
return clusterassignment::count(array(new field_filter('userid', $id), $filter));
}
return false;
}
