Yii: How to validate a form field? It can be null, but can not empty

Question

Yii: How to validate a form field? It can be null, but can not empty.

For example, I have a Book Model. When I do a form submitting, some of the fields can be null(not set), But It should not empty.

How to check it?

Answer 1

Yes you can, just not use that field in "required" validator, and use for this field any other, like "numeric" or some another validator. It will do a trick for you.