/**
* Delete selected fields
* @return
*/
protected function deleteFields()
{
foreach ((array) $_POST['field_ids'] as $field_id) {
$tmp_field = new ilCourseDefinedFieldDefinition($this->obj_id, $field_id);
$tmp_field->delete();
}
ilMemberAgreement::_deleteByObjId($this->obj_id);
ilUtil::sendSuccess($this->lng->txt('ps_cdf_deleted'));
$this->listFields();
return true;
}