mozilla/elasticutils — pull request #285 by tymofij (2014-12-29 21:55:14+00:00)
Title: .values_list('_source') should return unmodified _source

https://github.com/mozilla/elasticutils/commit/03f4094e516d7457d153e5628257ef7770a423af modifies all search results, even those that are not listified in any version of ElasticSearch, namely _source. It is transmitted verbatim, as it is a copy of the document that was indexed.