Hi Chris Thanks a lot for the mail.
I did not quite understand how that function was made. But, it does work like you said - there is a sorted list of documents now, where documents around value 20 are ranked first and documents around 10 are ranked below. (I chose a field with 0 and 100 as limits and tried with that. So, replaced infinities with 0 and 100 respectively) sort=map(map(myNumField,-Infinity,10,0),20,Infinity,0) desc, score desc If I needed Sorted results in ascending order, Results around the value 10 ranked above those of 20, what should I do in this case? I tried giving, sort=map(map(myNumField,-Infinity,10,0),20,Infinity,0) *asc*, score desc But, that does not seem to work quite as I expected. S. On Mon, Aug 22, 2011 at 9:48 PM, Chris Hostetter <hossman_luc...@fucit.org>wrote: > > : 1) The user gives a query, and also has an option to choose the "from" > and > : "to" values for a specific field. > : (For Eg: Give me all documents that match the query Solr Users, but with > : those that were last updated between 10th and 20th of August ranked on > top) > : > : -Over here, I am currently using a BoostQuery functionality, to do this. > : However, along with this, I want to provide an additional option of > Sorting > : these "boosted" results based on that range chosen above. > > This should be doable using sort by function, but obviously you'd have to > decide which "end" of the range should score higher. > > the key would be to: > * use a primary and a secondary sort > * secondary sort is simple "score desc" > * primary sort is on a function over the field whose range you care about > * primary sort function needs to map all values out of the range to a > constant value so secondary sort applies. > > I haven't tested this out, but i think the "map" function should make this > relatively straight forward... > > sort=map(map(myNumField,-Infinity,10,0),20,Infinity,0) desc, score desc > > Assuming "-Infinity" and "Infinity" are actaully legal values in functions > (if they aren't you'd need to pick some upper/lower limits) that should > sort any doc where "myNumField" is between 10 and 20 first, with docs > matching "20" sorting at the top above docs matching "19, 18, ... 10" and > then after those docs all remaining matching docs will sort by score. > > > -Hoss > -- Sowmya V.B. ---------------------------------------------------- Losing optimism is blasphemy! http://vbsowmya.wordpress.com ----------------------------------------------------
