Hi, On Fri, 2009-03-13 at 03:57 -0700, dabboo wrote: > bq works only with q.alt query and not with q queries. So, in your case you > would be using qf parameter for field boosting, you will have to give both > the fields in qf parameter i.e. both title and media. > > try this > > <str name=qf>media^1.0 title^100.0</str>
But with that, how will it know to rank media:DVD higher than media:BLU-RAY? Cheers, Pete > Pete Smith-3 wrote: > > > > Hi Amit, > > > > Thanks again for your reply. I am understanding it a bit better but I > > think it would help if I posted an example. Say I have three records: > > > > <doc> > > <long name="id">1</long> > > <str name="media">BLU-RAY</str> > > <str name="title">Indiana Jones and the Kingdom of the Crystal > > Skull</str> > > </doc> > > <doc> > > <long name="id">2</long> > > <str name="media">DVD</str> > > <str name="title">Indiana Jones and the Kingdom of the Crystal > > Skull</str> > > </doc> > > <doc> > > <long name="id">3</long> > > <str name="media">DVD</str> > > <str name="title">Casino Royale</str> > > </doc> > > > > Now, if I search for indiana: select?q=indiana > > > > I want the first two rows to come back (not the third as it does not > > contain 'indiana'). I would like record 2 to be scored higher than > > record 1 as it's media type is DVD. > > > > At the moment I have in my config: > > > > <str name="qf">title</str> > > > > And i was trying to boost by media having a specific value by using 'bq' > > but from what you told me that is incorrect. > > > > Cheers, > > Pete > > > > > > On Fri, 2009-03-13 at 03:21 -0700, dabboo wrote: > >> Pete, > >> > >> Sorry, if wasnt clear. Here is the explanation. > >> > >> Suppose you have 2 records and they have films and media as 2 columns. > >> > >> Now first record has values like films="Indiana" and media="blue ray" > >> and 2nd record has values like films="Bond" and media="Indiana" > >> > >> Values for qf parameters > >> > >> <str name="qf">media^2.0 films^1.0</str> > >> > >> Now, search for q=Indiana .. it should display both of the records but > >> record #2 will display above than the 1st. > >> > >> Let me know if you still have questions. > >> > >> Cheers, > >> amit > >> > >> > >> Pete Smith-3 wrote: > >> > > >> > Hi Amit, > >> > > >> > Thanks very much for your reply. What you said makes things a bit > >> > clearer but I am still a bit confused. > >> > > >> > On Thu, 2009-03-12 at 23:14 -0700, dabboo wrote: > >> >> If you want to boost the records with their field value then you must > >> use > >> >> q > >> >> query parameter instead of q.alt. 'q' parameter actually uses qf > >> >> parameters > >> >> from solrConfig for field boosting. > >> > > >> >>From the documentation for Dismax queries, I thought that "q" is simply > >> > a keyword parameter: > >> > > >> >>From http://wiki.apache.org/solr/DisMaxRequestHandler: > >> > q > >> > The guts of the search defining the main "query". This is designed to > >> be > >> > support raw input strings provided by users with no special escaping. > >> > '+' and '-' characters are treated as "mandatory" and "prohibited" > >> > modifiers for the subsequent terms. Text wrapped in balanced quote > >> > characters '"' are treated as phrases, any query containing an odd > >> > number of quote characters is evaluated as if there were no quote > >> > characters at all. Wildcards in this "q" parameter are not supported. > >> > > >> > And I thought 'qf' is a list of fields and boost scores: > >> > > >> >>From http://wiki.apache.org/solr/DisMaxRequestHandler: > >> > qf (Query Fields) > >> > List of fields and the "boosts" to associate with each of them when > >> > building DisjunctionMaxQueries from the user's query. The format > >> > supported is fieldOne^2.3 fieldTwo fieldThree^0.4, which indicates that > >> > fieldOne has a boost of 2.3, fieldTwo has the default boost, and > >> > fieldThree has a boost of 0.4 ... this indicates that matches in > >> > fieldOne are much more significant than matches in fieldTwo, which are > >> > more significant than matches in fieldThree. > >> > > >> > But if I want to, say, search for films with 'indiana' in the title, > >> > with media=DVD scoring higher than media=BLU-RAY then do I need to do > >> > something like: > >> > > >> > solr/select?q=indiana > >> > > >> > And in my config: > >> > > >> > <str name="qf">media^2</str> > >> > > >> > But I don't see where the actual *contents* of the media field would > >> > determine the boost. > >> > > >> > Sorry if I have misunderstood what you mean. > >> > > >> > Cheers, > >> > Pete > >> > > >> >> Pete Smith-3 wrote: > >> >> > > >> >> > Hi, > >> >> > > >> >> > I have managed to build an index in Solr which I can search on > >> keyword, > >> >> > produce facets, query facets etc. This is all working great. I have > >> >> > implemented my search using a dismax query so it searches > >> predetermined > >> >> > fields. > >> >> > > >> >> > However, my results are coming back sorted by score which appears to > >> be > >> >> > calculated by keyword relevancy only. I would like to adjust the > >> score > >> >> > where fields have pre-determined values. I think I can do this with > >> >> > boost query and boost functions but the documentation here: > >> >> > > >> >> > > >> >> > >> http://wiki.apache.org/solr/DisMaxRequestHandler#head-6862070cf279d9a09bdab971309135c7aea22fb3 > >> >> > > >> >> > Is not particularly helpful. I tried adding adding a bq argument to > >> my > >> >> > search: > >> >> > > >> >> > &bq=media:DVD^2 > >> >> > > >> >> > (yes, this is an index of films!) but I find when I start adding > >> more > >> >> > and more: > >> >> > > >> >> > &bq=media:DVD^2&bq=media:BLU-RAY^1.5 > >> >> > > >> >> > I find the negative results - e.g. films that are DVD but are not > >> >> > BLU-RAY get negatively affected in their score. In the end it all > >> seems > >> >> > to even out and my score is as it was before i started boosting. > >> >> > > >> >> > I must be doing this wrong and I wonder whether "boost function" > >> comes > >> >> > in somewhere. Any ideas on how to correctly use boost? > >> >> > > >> >> > Cheers, > >> >> > Pete > >> >> > > >> >> > -- > >> >> > Pete Smith > >> >> > Developer > >> >> > > >> >> > No.9 | 6 Portal Way | London | W3 6RU | > >> >> > T: +44 (0)20 8896 8070 | F: +44 (0)20 8896 8111 > >> >> > > >> >> > LOVEFiLM.com > >> >> > > >> >> > > >> >> > >> > -- > >> > Pete Smith > >> > Developer > >> > > >> > No.9 | 6 Portal Way | London | W3 6RU | > >> > T: +44 (0)20 8896 8070 | F: +44 (0)20 8896 8111 > >> > > >> > LOVEFiLM.com > >> > > >> > > >> > > -- > > Pete Smith > > Developer > > > > No.9 | 6 Portal Way | London | W3 6RU | > > T: +44 (0)20 8896 8070 | F: +44 (0)20 8896 8111 > > > > LOVEFiLM.com > > > > > -- Pete Smith Developer No.9 | 6 Portal Way | London | W3 6RU | T: +44 (0)20 8896 8070 | F: +44 (0)20 8896 8111 LOVEFiLM.com
