It looks like this is obsoleted by your newer change. Is that the case? If so, can you close this as "Discarded"?
[WIP] Add basic back-end function to return a set of reviewers relevant to a review request
Review Request #4792 — Created Oct. 17, 2013 and discarded
A very basic back-end function to get Users who have posted comments on some files contained in the diffset of a review request. This is very much a work in progress. Will keep updating as I learn more about how to do things efficiently using Django db queries.
Ran the function to ensure it returned data that looked reasonable. Ran unit tests (Though I didn't add any and didn't really do anything that could break them..) But they pass regardless.