Query.keyword_where returns not all results (due to ferret ranking ?)

[Benjamin Heitmann]

When doing this query:

q = Query.new.distinct(:t).
where(:s, SIOC::topic, :t).
keyword_where(:l, 'Semantic Web')

not all possible results get returned.

After consulting with Eyal, we are guessing that the ranking of the not returned results just is to low, and that we
might to fine tune how ferret calculates the ranking.

[Eyal Oren (ikbeneyal)]

keyword ranking is normal behaviour with keyword indices