(JMWE or other) Set a Text Field (multi-line) by concatenating from subtasks (with a separator)

Question

Jira Cloud...

I would like to create a multi-line text field by concatenating the values of an arbitrary multi-line text field from all subtasks.  The values would be separated by a newline.

Better yet would be to generate the value from each subfield with (KEY-123 - Value).

The use case is when reviewing an issue to confirm something, we would need to confirm each of the subtasks.   We would like to (on a particular transition) bring the values all to one place.

The source field could be Description (ideally prepended by Key).  The destination field would definitely be a custom field.

I've tried the following using JMWE:

This works if I use "key" (lowercase only) instead of "description".

I've also tried:
     {{issue.fields | field("fields") | join(",
", "description")}}

This even works for "summary", but still not for "description".

David Fischer · Accepted Answer

Hi @Ted Timar ,

you can easily achieve this using a Set Issue Fields (JMWE app) post function. Select the destination custom field as the field to set, and use this as the value:

{% for subtask in issue | subtasks( "description" ) %}
{{subtask.key}} - {{subtask.fields.description}}
{% endfor %}

That code assumes you want to gather values from each sub-task's Description field - replace the sub-task field (here "description") on lines 1 and 2 with the desired field ID (such as customfield_12345 for a custom field).