How to build groups in a Jira Structure by using a scripted field from ScriptRunner?

[Günter Halmans]

We use Jira Structure as well as Jira Scriptrunner. In a specific structure I would like to build groups using the data of a scripted field (issue picker) which I have defined with Jira Scriptrunner.

It is possible to use the issue picker field in a column of the structure. Very good.

But it seems to be not possible to group using this field. When I use the criteria "Text attributes..." and there the issue picker field, the groups are build, but in the "summary" of the group some internal informations are presented: "IssueRefJsonBean[id=266203,key=AAA-111,self=..."

How can I avoid this somehow cryptical informations and get only the summary and key of the issue from the issue picker?

Thanks in advance!

Best regards.

Günter