This is the documentation of JSU for Jira Cloud. If you are using JSU on Jira Server/Data Center, you can find the documentation here.
The 'Fields Required' checks whether values for specified fields are set for a given transition. You must select mandatory fields, when configuring the transition. For example: JSU default behaviour is to apply the context settings – whether the field is actually configured for the issue in transition. This means that if a field that is required by this check, but has no valid context for the current issue, it will not be checked. A workflow is configured so that the 'Ready for Review' transition has the 'Fields Required' check where the 'Reviewer' is mandatory. It will then copy the Reviewer to the Assignee, assigning the issue to the reviewer. You should be aware, however, that not all field types or all combinations are supported. We have tried to cover the most important field types but we are continuously adding more and improving how different field types are supported. We recommend you test JSU with fields to see if it is compatible with your system. Our evaluation license provides you with a 30-day free trial. Description
Configuration
Example
Supported Field Types