/**
* Checks whether there are events which need to be updated concerning a
* given DB field.
*
* @param string $fieldToUpdate the DB field to check for needing an update, must be 'registrations'
*
* @return bool TRUE if any rows need to be updated, FALSE otherwise
*/
private function needsToUpdateEventField($fieldToUpdate)
{
switch ($fieldToUpdate) {
case 'registrations':
$whereClause = 'registrations = 0 AND EXISTS (' . 'SELECT * FROM tx_seminars_attendances' . ' WHERE seminar = tx_seminars_seminars.uid ' . tx_oelib_db::enableFields('tx_seminars_attendances') . ')';
break;
default:
throw new InvalidArgumentException('needsToUpdateEventField was called with "' . $fieldToUpdate . '", but the allowed value is only "registrations"', 1333291685);
break;
}
return tx_oelib_db::count('tx_seminars_seminars', $whereClause) > 0;
}
