How to make Cascading Drop-down child field mandatory only when parent has value?

[Jira Dev]

Hello all, I need help in setting up a validation on Cascading drop-down custom field in a JIRA Data Center environment using ScriptRunner Behaviours. How to make a "child" part mandatory, but only if a "parent" has a value?

[Ram Kumar Aravindakshan _Adaptavist_]

Hhi @Jira Dev

Welcome to the Community.

I have provided the exact answer to your requirement in this Community Post.

The solution provided in the link also uses ScriptRunner's Behaviour and performs a validation to ensure that both Parent and Child options are selected in the Cascade Select List.

I hope this helps answer your question. :-)

Let me know how it goes.

Thank you and Kind regards,
Ram 

[Jira Dev]

Not all of my “parent” options have “child” values, so the script doesn’t work the way I need it to. It currently makes the “child” field mandatory for every “parent,” even when there are no child options available.