rankmode default value not set

[dbrgn]

In the sourcecode, I found

SPH_RANK_PROXIMITY_BM25 = 0 # default mode, (...)

But when not setting rankmode in my model, ranking does not occur, all weight values are set to 1.

[dbrgn]

Actually the default mode gets set to 2 (SPH_RANK_NONE).

>>> Company.search.query('UBS AG')._rankmode
2

That has a strong effect on search results.

Workaround is to set rankmode = u'SPH_RANK_PROXIMITY_BM25' in the model's SphinxSearch instance.