@jasisz I am working on updating this branch [here](https://github.com/mattdeboard/django-haystack/tree/upstream-rebase-extra-method); could use a hand writing a good test for the elasticsearch version of this method. [This](https://github.com/mattdeboard/django-haystack/blob/upstream-rebase-extra-method/tests/elasticsearch_tests/tests/elasticsearch_backend.py#L716) is what I've got so far but it's pretty weak.