Assets object custom field filter based on another field

[Marcel Diskowski]

I have an Assets object custom field that contains one or more objects. Now I want to configure another Assets object custom field, where a single object (of the same type) can be selected, to only allow the selection of one of the objects in the first custom field. So far, I was unable to find a working AQL for this scenario. My current attempt is:

Key IN ${customfield_15600.Key}

[Marcel Diskowski · Accepted solution]

The solution is:

Key IN (${customfield_15600${0}})