Using smart Value in JQL request in branch

[Joss]

Hello ! 

I'd like to do a ticket search with a JQL branch that uses a variable I create and retrieves information with a REGEX match.
But when I run my test with .match I see in the logs that it's empty. Do I have an escapement problem or is it just not possible?

I send screen :

The result of audit log : 

Error searching for related issues. This is most likely because the following issues don't have a related issue of the type you specified. Try narrowing your search to only include issues that contain links to related issues:

NEX-9: "((Key = ) AND (key != NEX-9)) AND (project in (10014))" - Error in JQL Query: Expecting either a value, list or function but got ')'. You must surround ')' in quotation marks to use it as a value. (line 1, character 9)

And finally, the information given in the description of my ticket that should match is: "NEX-1" and I do have an existing ticket named NEX-1.

I've tested this by setting key = NEX-1 directly, and it works fine.

So if you can help me, I'd be very grateful!

[Rebekka Heilmann _viadee_]

What exactly are you trying to achieve?

Where does the second error message come from? I don't see any matching action/condition in your automation branch.

[Joss]

What I'm trying to do with the branch is to match a ticket key and then add a comment to this matched ticket.
The initial aim of my approach is to retrieve information from a ticket created by an e-mail request and add a comment to another ticket containing the information from the new ticket created by e-mail.

The second error message come from the branch "For JQL", the error "((Key = ) AND " is empty but I'd like to see the result of my JQL request :

Key = {{issue.description.match("(?i)NEX\s*-\s*[0-9]{1,4}")}}

, which should retrieve the information from the ticket description created following the e-mail request.

I've also tried issuetrigger, but it's no better.

Thank you for your reply !

[Joss]

I think I've understood where the problem comes from, it's my expression with .match that simply doesn't work since I've tried using {{issue.description}} and I manage to get the desired result.
How would I have to use .match("..regex..") for it to work properly?