function OnLoadPageData()
{
# get item to be deleted
if (!is_object($this->data_object)) {
$id = $this->manager->GetItemId($this->data_object);
$this->manager->ReadById(array($id));
$this->data_object = $this->manager->GetFirst();
# How many seasons in this competition?
if (is_object($this->data_object) and $this->data_object->GetCompetition() instanceof Competition and $this->data_object->GetCompetition()->GetId()) {
$this->manager->Clear();
$this->manager->ReadByCompetitionId(array($this->data_object->GetCompetition()->GetId()));
$this->seasons_in_competition = $this->manager->GetCount();
}
}
# tidy up
unset($this->manager);
}
