Hi!
I think what you get is the expected behaviour. Since you don't use
Ferret's QueryParser but build your queries on your own, you're also
responsible for proper tokenization / analysis of your query content.
So running your phrase through your analyzer before constructing the
phrase query should work as expected.
Cheers,
Jens
On Mon, May 12, 2008 at 02:33:23PM -0400, S D wrote:
> Hi,
>
> I'm having difficulty getting the StemFilter and PhraseQuery to work
> properly together. When I use a StemFilter with a PhraseQuery, searches only
> work if the phrase consists of stems. For example, the search phrase
> "reduces health care" will not work but the phrase "reduce health care" will
> work even though the exact text "reduces health care" is contained in the
> original document. I'd like to use StemFilter in conjunction with
> PhraseQuery because I need the stemming and I also need to be able to use
> the slop feature of PhraseQuery. Below is my use of StemFilter and
> PhraseQuery. Is there anything I'm doing wrong or is the above description
> what I should expect? To get the response that I'm expecting I could parse
> the phrase and build up a query to be used by QueryParser but I'd like a
> more succinct solution for now.
>
> I use a StemFilter in my analyzer as follows:
>
> def token_stream(field, str)
> ...
> ts = LowerCaseFilter.new(ts) if @lower
> ts = StopFilter.new(ts, @stop_words)
> ts = StemFilter.new(ts)
> ...
> end
>
> My use of PhraseQuery is as follows:
>
> def generate_query(phrase)
> phrase = phrase.downcase
> phrase_parts = phrase.split(' ')
> query = Ferret::Search::PhraseQuery.new(:content, 2)
> phrase_parts.each do |part|
> # puts "part: \"" + part + "\""
> query.add_term(part, 1)
> end
> query
> end
> _______________________________________________
> Ferret-talk mailing list
> [email protected]
> http://rubyforge.org/mailman/listinfo/ferret-talk
--
Jens Krämer
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GF Sven Haubold
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