Jira Automation - Advanced Field Editing - Looping on List Variable gen from match() fails

[Guy Derriman]

Im sure this is a bug but cant find where to log it.
The scenario I'm trying to create is to copy all labels matching "AssetMaintenance_*" from an Epic to it's child issues. 

If I loop on children issues then 
Edit Issue fields - advanced field editing
it works

{
"update": {
"labels": [{{#issue.parent.labels.match("(AssetMaintenance_[^,]*)")}}{"add": "{{.}}"}{{^last}},{{/}}{{/}}]
}
}

However if I use the same statement and assign it to a variable it fails 

Create variable 

parentLabelList = issue.labels.match("(AssetMaintenance_[^,]*)")

Then loop on children issues then 
Edit Issue fields - advanced field editing
it fails

{
"update": {
"labels": [{{#parentLabelList}}{"add": "{{.}}"}{{^last}},{{/}}{{/}}]
}
}

ERROR: Error while parsing additional fields. Not valid JSON.

the problem is I have to do an if condition and copy and paste the logic to check the count before looping. So I have to copy the complex regex twice :(

[Bill Sheboy · Accepted solution]

Hi @Guy Derriman -- Welcome to the Atlassian Community!

Would you please post images of:

• your complete rule,
• including the details of the Create Variable, condition, the issue edit, and 
• of the full audit log details showing a rule execution

Those will provide context to help explain this symptom.  Thanks!

Until we see those, I suspect the problem is you are missing a split on your created variable before you try to iterate over it in the advanced edit.  The source labels were a list, but the variable is just text.

{
  "update": {
    "labels": [{{#parentLabelList.split(",")}}{"add": "{{.}}"}{{^last}},{{/}}{{/}}]
  }
}

Seeing the complete information will confirm this.

Kind regards,
Bill

[Guy Derriman]

This was it Bill, thanks so much for your time and effort to point it out.

[Bill Sheboy]

Awesome!  I am glad to learn it is working.