public function getCMSFields()
{
$fields = parent::getCMSFields();
$fields->add(new TextField('InitialValue', 'Initial Value'));
if ($this->ID > 0) {
//validation rules
$config = GridFieldConfig_RelationEditor::create();
$config->removeComponentsByType('GridFieldAddNewButton');
$gridField = new GridField('ValidationRules', 'ValidationRules', $this->ValidationRules(), $config);
$fields->add($gridField);
}
return $fields;
}
protected function onBeforeDelete()
{
parent::onBeforeDelete();
foreach ($this->Values() as $v) {
$v->delete();
}
}
