[TYPO3-50-general] optional or nested validators

[Martin Kutschker]

Pascal Jungblut schrieb:
> Hello,
> 
> I'm curious about the validation feature. Let's assume I have an
> optional field in fe_users (e.g. 'zip'). I want the user to enter either
> nothing _or_ a five-digit number.

IMHO "required" is a field property not a validation. v4 any many extensions get that mixed up.

Masi