Project single item from nested collection

[John Zablocki]

I want to query a nested collection and return only a single item from
that nested collection. For example, if I have a (blog) post document
that has a comments collection and I want to retrieve a comment for a
single user without first retrieving all comments, is that possible?

Thanks.

-- jz

[Michael Dirolf]

It's not (currently) possible to retrieve a single nested comment
based on a query (like by user), but you can do it based on index in
the array, or even return slices of the array (again, by index). There
are a couple of cases open that should make this behavior a bit more
flexible - virtual collections and support for the positional operator
in the fields to return document.

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[John Zablocki]

Thanks Mike. So the new $slice operator in 1.5.x would address this?