When you add this post-function to a transition and trigger the transition, the add-on sets the value(s) of the selected field to the value(s) from the same field of the issue's parent issue.
Options
- Copy only if not set
Copies the value of the selected field, only when the field is empty on the current issue.
- Ignore empty values
Will not set (clear) the selected field of the current issue, if the value from the parent issue is empty or null.
- Add source value(s) to destination field
Appends the selected field of the current issue with value(s) from the same field of its parent issue. This is applicable only to multi-valued fields.
Conditional execution
To execute this post-function based on the result of a groovy expression see Conditional execution using Groovy expression.
The parent/child relationship in JIRA refers to issues and their subtasks, not to the Epics and their Stories.
If you wish to copy a field from an Epic to a Stories, you can use the Copy field value to linked issues post-function.