Check the number of authors in citekey generation

[anamyk]

Hi all,

I like my citekey to be "authorLast + auth + year + "_" + shorttitle(6,6)" as I like to see which group published a work and the lastauthor uses to be the professor which stays more constant.

Now sometimes I import media that has only one author, but the citekey uses the name two times, as authorLast and auth are the same.

I though I could check for the total number of authors and then use a different formula, e.g.
auth.items('=',1) auth + year + "_" + shorttitle(6,6) | authorLast + auth + year + "_" + shorttitle(6,6)

Any idea how to do this or if this is possible? Appreciate any help!

[retorquere]

depends on whether you want to literally check for a creator of type author, and make sure there is exactly one of those:

creators(type=author, min=1, max=1).discard + auth + year + "_" + shorttitle(6,6) | authorLast + auth + year + "_" + shorttitle(6,6)

or just whether there is one creator regardless of its type:

creators(min=1, max=1).discard + auth + year + "_" + shorttitle(6,6) | authorLast + auth + year + "_" + shorttitle(6,6)