From a0d0770b35d3d343c1c65d2ed306d12b70831710 Mon Sep 17 00:00:00 2001 From: Jared Camins-Esakov Date: Tue, 11 Dec 2012 12:16:20 -0500 Subject: [PATCH] Bug 9239: Add syspref to enable QueryParser In light of the experimental nature of the QueryParser code at this juncture, it behooves Koha to have the option of disabling QP, at least for the purpose of comparing results between QP-enabled and QP-disabled searches. This patch adds a UseQueryParser syspref to do just that. In cases where the user enables QP without having QP installed, however, there will be no dramatic failure, and Koha will simply fall back to using the non-QP search code. In order to reduce the overhead added by the introduction of QueryParser, this patch adds a C4::Context->queryparser accessor to a static QueryParser object which is initialized the first time it is required and then reset thereafter. Signed-off-by: Chris Cormack --- C4/Context.pm | 43 ++++++++++++++++++++ installer/data/mysql/sysprefs.sql | 1 + installer/data/mysql/updatedatabase.pl | 7 ++++ .../en/modules/admin/preferences/searching.pref | 7 ++++ 4 files changed, 58 insertions(+) diff --git a/C4/Context.pm b/C4/Context.pm index 4e6c5fb..4141b68 100644 --- a/C4/Context.pm +++ b/C4/Context.pm @@ -105,6 +105,7 @@ use C4::Boolean; use C4::Debug; use POSIX (); use DateTime::TimeZone; +use Module::Load::Conditional qw(can_load); =head1 NAME @@ -941,6 +942,48 @@ sub restore_dbh # return something, then this function should, too. } +=head2 queryparser + + $queryparser = C4::Context->queryparser + +Returns a handle to an initialized Koha::QueryParser::Driver::PQF object. + +=cut + +sub queryparser { + my $self = shift; + unless (defined $context->{"queryparser"}) { + $context->{"queryparser"} = &_new_queryparser(); + } + + return $context->{"queryparser"}; +} + +=head2 _new_queryparser + +Internal helper function to create a new QueryParser object. QueryParser +is loaded dynamically so as to keep the lack of the QueryParser library from +getting in anyone's way. + +=cut + +sub _new_queryparser { + my $qpmodules = { + 'OpenILS::QueryParser' => undef, + 'Koha::QueryParser::Driver::PQF' => undef + }; + if ( can_load( 'modules' => $qpmodules ) ) { + my $QParser = Koha::QueryParser::Driver::PQF->new(); + my $config_file = $context->config('queryparser_config'); + $config_file ||= '/etc/koha/searchengine/queryparser.yaml'; + if ( $QParser->load_config($config_file) ) { + # TODO: allow indexes to be configured in the database + return $QParser; + } + } + return; +} + =head2 marcfromkohafield $dbh = C4::Context->marcfromkohafield; diff --git a/installer/data/mysql/sysprefs.sql b/installer/data/mysql/sysprefs.sql index 6dcab3d..1c7217e 100644 --- a/installer/data/mysql/sysprefs.sql +++ b/installer/data/mysql/sysprefs.sql @@ -399,3 +399,4 @@ INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES(' INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES('SeparateHoldingsBranch', 'homebranch', 'Branch used to separate holdings', 'homebranch|holdingbranch', 'Choice'); INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES('OpacSeparateHoldings', '0', 'Separate current branch holdings from other holdings (OPAC)', NULL, 'YesNo'); INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES('OpacSeparateHoldingsBranch', 'homebranch', 'Branch used to separate holdings (OPAC)', 'homebranch|holdingbranch', 'Choice'); +INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES('UseQueryParser', '1', 'If enabled, try to use QueryParser for queries.', NULL, 'YesNo'); diff --git a/installer/data/mysql/updatedatabase.pl b/installer/data/mysql/updatedatabase.pl index 2c4b1ed..95bea61 100755 --- a/installer/data/mysql/updatedatabase.pl +++ b/installer/data/mysql/updatedatabase.pl @@ -6298,6 +6298,13 @@ if (C4::Context->preference("Version") < TransformToNum($DBversion)) { SetVersion ($DBversion); } +$DBversion = "3.11.00.XXX"; +if (CheckVersion($DBversion)) { + $dbh->do("INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES('UseQueryParser', '1', 'If enabled, try to use QueryParser for queries.', NULL, 'YesNo')"); + print "Upgrade to $DBversion done (Bug 9239: Make it possible for Koha to use QueryParser)\n"; + SetVersion ($DBversion); +} + =head1 FUNCTIONS diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref index 7b99173..4232be5 100644 --- a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref +++ b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref @@ -58,6 +58,13 @@ Searching: no: "Not using" - 'ICU Zebra indexing. Please note: This setting will not affect Zebra indexing, it should only be used to tell Koha that you have activated ICU indexing if you have actually done so, since there is no way for Koha to figure this out on its own.' - + - pref: UseQueryParser + default: 1 + choices: + yes: Try + no: "Do not try" + - 'to use the QueryParser module for parsing queries. Please note: enabling this will have no impact if you do not have QueryParser installed, and everything will continue to work as usual.' + - - pref: IncludeSeeFromInSearches default: 0 choices: -- 1.7.10.4