[Koha-bugs] [Bug 12430] Truncation disables relevance ranking (and has issues when using QueryParser)
bugzilla-daemon at bugs.koha-community.org
bugzilla-daemon at bugs.koha-community.org
Tue Jun 17 08:18:13 CEST 2014
http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=12430
--- Comment #2 from David Cook <dcook at prosentient.com.au> ---
There's a bit of odd code in Koha\QueryParser\Driver\PQF\query_plan\node.pm,
which is where a lot of the action happens in QP...
When doing a "Library Catalog" search, it tries to use the following code to
create a relevance query branch:
$fieldobj = $self->plan->QueryParser->bib1_mapping_by_name('field',
$relbump->{'classname'}, $relbump->{'field'}, $server);
This means $fieldobj, which should contain our CCL2RPN type mapping, will
always be null because $relbump->{'classname'} and $relbump->{'field'} don't
exist.
This is why the 2nd line in the following code doesn't have an @attr 1=1016 in
it.
@attr 1=1016 @attr 5=1 @attr 4=6 "test"
@or
@attr 9=20 @attr 2=102 @attr 5=1 @attr 4=6 "test"
But we don't notice the error in the OPAC, as I think Zebra/Yaz/Zoom/whatever
silently treats the second branch as having @attr 1=1016 as a bare search will
usually be treated as a keyword (ie @attr 1=1016).
--
Here is another odd bit of code, which is responsible for QueryParser's current
"support" for relevance.
my $relbumps = $self->plan->QueryParser->bib1_mapping_by_name('relevance_bump',
$self->classname, '', $server);
This line will return ALL the relevance_bump mappings under the keyword
class...which are 'titleext' and 'titlekw'.
I think these may have been example mappings...as it doesn't really make sense
to have them under a keyword class search. It should be a "keyword" class
search with a "keyword" field rather than a "titleext" field, in my opinion.
--
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