How to make child field required in Customer Portal?

[Marie Heckel]

We have a request type in our IT Helpdesk where you can select hardware devices. You first select the category and then the specific device in a cascading selection field.

I want the child field to be required. I only found ways to do this with a script validator. Is there also a possibility to implement this with a script runner behavior? I would prefer that, since I can set the behavior on the individual request types. This is not possible with the validator.

[Simon H]

Hi Marie, ProForma (or the free version ProForma Lite) can help you do this. Below is a quick example from one of our template forms (I'm the product manager for ProForma). You can try it for yourself on our demo site; no login is required https://proformademo.thinktilt.net

[Wim Abts]

Hi @Simon H 

I suppos your solution with forms does not include cascading select fields?
Do you have a solution to make a sub-item required when using a cascading select field on a form?