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

[promanov_]

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 · Accepted solution]

This should work:

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

[promanov_]

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

[Florent_Guillau]

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_]

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