Automation to link current issue to issue in Issue Picker field

[Maria DePasquale]

Whenever a user selects an issue from an issue picker (Related Project), I'd like to link the current issue (Epic) to the issue selected as a child of that issue.  

So, user selects POP-1 from the Related Project (issue picker) field

I'd like to create a link and make the Epic a child of POP-1.  Does one have any ideas on how to do this with Automation is Jira Data Center? 

[Maria DePasquale · Accepted solution]

I solved my own issue.  The trick is to specify {{issue.customfield_xxxx.key}}
The other point to note is that the linking of issues is additive so I also delete all "is child of" links, then link to whatever is selected in the issue picker field: 

[Kseniia Trushnikova]

Hi @Maria DePasquale,

Do you use an add-on to create issue picker fields? If so, what add-on?

Try to replace the smart value with the one with ID {{issue.customfield_XXXXX}}. Will it work?

[Maria DePasquale]

{{issue.customfield_XXXXX}} was tried and also does not work.  The error message is: (Too many operations (24) provided for field 'issuelinks'. We support at most 1 operation for this field. (issuelinks)).  

The Issue Picker field is just a basic Issue Picker field created through Custom Fields. 

If I hard-code the ticket number that is selected in the Related Project field, it works.  So, the issue is to capture the ticket number in a programmatic way.