Hi again, for the records, replying my own recent post: the way to test if a variable exists in a zsql method is through has_key NOT hasattr. In other words: <dtml-if "_.has_key('foo')">...</dtml-if> Sorry for bothering, it's been a long time not dealing with dtml.... Pablo Pablo Ziliani wrote:

Hi everyone, I have what I think is a banal question here... Is there any way I can test inside a zsql method if an argument has been passed? <dtml-if foo> won't work because 0 (zero) is an expected value. Have tried <dtml-if "_.hasattr(_, 'foo')"> but it seems to be always false (where's that namespace?)

TIA, Pablo