KSx::Search::Filter(3)User Contributed Perl DocumentatioKSx::Search::Filter(3)NAMEKSx::Search::Filter - Build a caching filter based on results of a
Query.
SYNOPSIS
my %category_filters;
for my $category (qw( sweet sour salty bitter )) {
my $cat_query = KinoSearch::Search::TermQuery->new(
field => 'category',
term => $category,
);
$category_filters{$category} = KSx::Search::Filter->new(
query => $cat_query,
);
}
while ( my $cgi = CGI::Fast->new ) {
my $user_query = $cgi->param('q');
my $filter = $category_filters{ $cgi->param('category') };
my $and_query = KinoSearch::Search::ANDQuery->new;
$and_query->add_child($user_query);
$and_query->add_child($filter);
my $hits = $searcher->hits( query => $and_query );
...
DESCRIPTION
A Filter is a KinoSearch::Search::Query subclass that can be used to
filter the results of another Query. The effect is very similar to
simply using the wrapped inner query, but there are two important
differences:
· A Filter does not contribute to the score of the documents it
matches.
· A Filter caches its results, so it is more efficient if you use it
more than once.
To obtain logically equivalent results to the Filter but avoid the
caching, substitute the wrapped query but use set_boost() to set its
"boost" to 0.
METHODS
new
my $filter = KSx::Search::Filter->new(
query => $query;
);
Constructor. Takes one hash-style parameter, "query", which must be an
object belonging to a subclass of KinoSearch::Search::Query.
BUGS
Filters do not cache when used in a search cluster with KSx::Remote's
SearchServer and SearchClient.
COPYRIGHT AND LICENSE
Copyright 2005-2010 Marvin Humphrey
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
perl v5.14.1 2011-06-20 KSx::Search::Filter(3)
