public function OnPostback()
{
$this->school = $this->edit->GetDataObject();
# save data if valid
if ($this->IsValid()) {
$ground_id = $this->ground_manager->SaveGround($this->school->Ground());
$this->school->Ground()->SetId($ground_id);
$this->school_manager->SaveSchool($this->school);
$this->Redirect($this->school->GetNavigateUrl());
}
}
