Hi, first of all, 6 documents is not really a corpus to judge the usability of more_like_this - by default it will only consider terms occuring in at least 5 documents to be of any relevance (:min_doc_freq option). So if you have very different documents where the only common words are filtered out as noise words, you'll end up without any terms to use for finding similar documents, which would lead to the query you mentioned.
However more_like_this should indeed return an empty result set in this case ;-) Besides that, you should store term vectors (give :term_vector => :yes for the fields you want to use more_like_this on in your call to acts_as_ferret), this will speed up the search for relevant terms. Jens On Tue, Jul 17, 2007 at 12:11:55PM +0200, Florian Gilcher wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi, > > I have the following Problem: > > I created a fairly simple sample project to try out acts_as_ferret and > present the results. > > The test set is relatively easy: I have extracts from 6 > Wikipedia-Articles about several Topics, which are copied into a model > that has two fields: title and text. This works quite well, until I try > to use #more_like_this, which returns all of the other articles, even if > they have nothing to do with the active article. I debugged a bit and > found out that the query build by #more_like_this is nothing more then > "-id:<id of the active record>". > (so the _result_ is correct) > > To try that out on the console, I used: > > entry = Entry.find(1) > entry.more_like_this(:field_names => ['text']) > > Either I'm doing something entirely wrong or there is a bug. ;) Before > filing a ticket, I want to rule out the first case. > > Ferret version is 0.11.4, aaf version is the current stable version > (although trunk didn't work as well). > > I uploaded the demo project together with a dump of the Database to: > > Project: http://putstuff.putfile.com/95477/8752808 > Dump: http://putstuff.putfile.com/95479/6169502 > > Thanks in advance. > Florian Gilcher > > P.S.: There is another minor bug. Altough #more_like_this does set a > default option for :field_names (line #35), this option leads to a crash > in #retrieve_terms. The default option is nil and #retrieve_terms thus > tries to call #each on nil. (line #113) > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.3 (Darwin) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFGnJXo8RlGMqQ8m7oRAoAqAJ4g3oqoLk8XB61tCm+hUJlKdfz0UQCgmoSi > /t3GM4u/N10/S1DVyzUUE48= > =wocT > -----END PGP SIGNATURE----- > _______________________________________________ > Ferret-talk mailing list > [email protected] > http://rubyforge.org/mailman/listinfo/ferret-talk > -- Jens Krämer webit! Gesellschaft für neue Medien mbH Schnorrstraße 76 | 01069 Dresden Telefon +49 351 46766-0 | Telefax +49 351 46766-66 [EMAIL PROTECTED] | www.webit.de Amtsgericht Dresden | HRB 15422 GF Sven Haubold, Hagen Malessa _______________________________________________ Ferret-talk mailing list [email protected] http://rubyforge.org/mailman/listinfo/ferret-talk
