Here is an approach that avoids the IDF problem.
Add another field, perhaps named "priority". In that field, put a boost
value, like 100 for allele docs, 10 for mi_attempt docs, and so on. In the
boost part of the query, use the value of that field boost=priority.
If you cannot change the index, you may be able do the same thing with if
statements in the function query, see
http://wiki.apache.org/solr/FunctionQuery
This is a common design request, to show all results of type A before all
results of type B, and it has a common and severe problem. If your query
term is common, the user will see 10,000 hits of type A, all the way to the
least relevant, before they see the highly-relevant first hit of type B.
So, the search is broken for all common query terms and there is nothing
the user can do to fix it.
Instead, use a smaller boost, maybe a bit more than a tiebreaker, but not
enough to force a total ordering. You may also want to use facets or fixed
filters, so that users can select only alleles or only my_attempts.
wunder
On Oct 16, 2012, at 8:21 AM, Asfand Qazi wrote:
On 16/10/12 16:15, Walter Underwood wrote:
Why do you want that ordering? That isn't what Solr is designed to do.
It is designed for relevance. I expect that idf (the rarity of the terms)
is being used in the ordering. "mi_attempt" is probably much more rare than
"allele".
If you want that strict ordering, I recommend doing three queries and
concatenating the three result sets.
wunder
I want that ordering because alleles are more 'important' to a biologist
than an mi_attempt, which is 'more important' than a phenotype_attempt.
If Solr isn't designed for this kind of stuff, then I will do the
sorting manually after I have received all the documents. I could give
huge boost values to each term, but then I guess I'm just using a
sledgehammer to crack a nut.
Thanks
--
Regards,
Asfand Yar Qazi
Team 87 - High Throughput Gene Targeting
Wellcome Trust Sanger Institute
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Limited, a charity registered in England with number 1021457 and a company
registered in England with number 2742969, whose registered office is 215
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Walter Underwood
wun...@wunderwood.org
