How can I make a required custom field be required only on a particular screen?

Question

I have a custom field that I made required. The problem is that even if I don't assign the field to a particular screen, the Create screen still requires a value to be placed in the field. What I want to accomplish is having the required custom field assigned only to a View/Edit screen and able to create an issue while bypassing entering a value in the field as long as its not displayed on the Create screen.

Nic Brough -Adaptavist- · Answer

You don't, in plain JIRA, the mandatory flag is on or off for an issue type, it's nothing to do with screens.

You can

* do something like this with Javascript (not recommended)
* Use and add-on (The Behaviours part of the Script Runner should do it)
* Use validators to check the input as it moves through the workflow (but again, you'll need add-ons to provide a validator for "field is mandatory" - there are plenty of implementations, some of them free of charge - JIRA Suite Utilities is the main example for me)