topic Re: NXQL: how to query docs with a list property attribute equal to null / empty / unvaluated? in Nuxeo Forum

NXQL: how to query docs with a list property attribute equal to null / empty / unvaluated?

promanov_ — Mon, 14 Apr 2014 00:38:05 GMT

I have a custom doc model with a list attribute containing IDs to other objects, thus representing a list of links.

I'd like to query objects that have no values on this attribute, something like:

SELECT * FROM Document WHERE dc:subjects = NULL

Is it possible? I've not found anything like this in the official NXQL doc.

Thanks.

Florent_Guillau — Mon, 14 Apr 2014 01:11:03 GMT

This should work:

SELECT * FROM Document WHERE dc:subjects/0 IS NULL

promanov_ — Mon, 14 Apr 2014 08:28:42 GMT

Thanks! It works perfectly (run on Nuxeo 5.8).

Florent_Guillau — Mon, 14 Apr 2014 10:59:51 GMT

As you can see the semantics are slightly different from what you're asking, but I think this is the best we can do. Also `dc

promanov_ — Mon, 14 Apr 2014 11:42:27 GMT

Indeed.. not obvious to figure it out by yourself. Still, as long as it does the job it's just as good. Thanks again.