Query for finding un-referenced documents in Sanity.io

Is there a convenient GROQ query to find un-referenced documents?

I tried

_type == $type && count(*[_type == "article" && references(^._id)]) == 0

but it times out..

You are looking for articles that doesn't have any references from from other articles?

Not quite - I'm looking for articles that are detached islands - not referenced from other articles or any other type of document.. This is basically for cleaning up after imports that may have gone wrong at some point.

So, say, articles not referenced from articleCollections nor issues.. (Issues nest their references to articles a few objects deep, hope this does not matter too much..)

Ah, gotcha. I guess you could base yours from this one? Does the same thing: https://github.com/sanity-io/sanity-recipes/blob/master/snippets/deleteUnusedAssets.js#L10-L15

So, say, articles not referenced from articleCollections nor issues.. (Issues nest their references to articles a few objects deep, hope this does not matter too much..)

Ah, gotcha. I guess you could base yours from this one? Does the same thing: https://github.com/sanity-io/sanity-recipes/blob/master/snippets/deleteUnusedAssets.js#L10-L15

Looks useful, thanks!

Not quite - I'm looking for articles that are detached islands - not referenced from other articles or any other type of document.. This is basically for cleaning up after imports that may have gone wrong at some point.

2nd, super useful! thank you. 🙂