1 package Koha::SearchEngine::Elasticsearch;
3 # Copyright 2015 Catalyst IT
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it under the
8 # terms of the GNU General Public License as published by the Free Software
9 # Foundation; either version 3 of the License, or (at your option) any later
12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License along
17 # with Koha; if not, write to the Free Software Foundation, Inc.,
18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 use base qw(Class::Accessor);
25 use Koha::Exceptions::Config;
26 use Koha::SearchFields;
27 use Koha::SearchMarcMaps;
33 use Search::Elasticsearch;
37 use List::Util qw( sum0 reduce );
40 use Encode qw(encode);
43 __PACKAGE__->mk_ro_accessors(qw( index ));
44 __PACKAGE__->mk_accessors(qw( sort_fields ));
46 # Constants to refer to the standard index names
47 Readonly our $BIBLIOS_INDEX => 'biblios';
48 Readonly our $AUTHORITIES_INDEX => 'authorities';
52 Koha::SearchEngine::Elasticsearch - Base module for things using elasticsearch
60 The name of the index to use, generally 'biblios' or 'authorities'.
70 my $self = $class->SUPER::new(@_);
71 # Check for a valid index
72 Koha::Exceptions::MissingParameter->throw('No index name provided') unless $self->index;
76 =head2 get_elasticsearch
78 my $elasticsearch_client = $self->get_elasticsearch();
80 Returns a C<Search::Elasticsearch> client. The client is cached on a C<Koha::SearchEngine::ElasticSearch>
81 instance level and will be reused if method is called multiple times.
85 sub get_elasticsearch {
87 unless (defined $self->{elasticsearch}) {
88 my $conf = $self->get_elasticsearch_params();
89 $self->{elasticsearch} = Search::Elasticsearch->new($conf);
91 return $self->{elasticsearch};
94 =head2 get_elasticsearch_params
96 my $params = $self->get_elasticsearch_params();
98 This provides a hashref that contains the parameters for connecting to the
99 ElasicSearch servers, in the form:
102 'nodes' => ['127.0.0.1:9200', 'anotherserver:9200'],
103 'index_name' => 'koha_instance_index',
106 This is configured by the following in the C<config> block in koha-conf.xml:
109 <server>127.0.0.1:9200</server>
110 <server>anotherserver:9200</server>
111 <index_name>koha_instance</index_name>
116 sub get_elasticsearch_params {
119 # Copy the hash so that we're not modifying the original
120 my $conf = C4::Context->config('elasticsearch');
121 die "No 'elasticsearch' block is defined in koha-conf.xml.\n" if ( !$conf );
122 my $es = { %{ $conf } };
124 # Helpfully, the multiple server lines end up in an array for us anyway
125 # if there are multiple ones, but not if there's only one.
126 my $server = $es->{server};
127 delete $es->{server};
128 if ( ref($server) eq 'ARRAY' ) {
130 # store it called 'nodes' (which is used by newer Search::Elasticsearch)
131 $es->{nodes} = $server;
134 $es->{nodes} = [$server];
137 die "No elasticsearch servers were specified in koha-conf.xml.\n";
139 die "No elasticsearch index_name was specified in koha-conf.xml.\n"
140 if ( !$es->{index_name} );
141 # Append the name of this particular index to our namespace
142 $es->{index_name} .= '_' . $self->index;
144 $es->{key_prefix} = 'es_';
145 $es->{client} //= '5_0::Direct';
146 $es->{cxn_pool} //= 'Sniff';
147 $es->{request_timeout} //= 60;
152 =head2 get_elasticsearch_settings
154 my $settings = $self->get_elasticsearch_settings();
156 This provides the settings provided to Elasticsearch when an index is created.
157 These can do things like define tokenization methods.
159 A hashref containing the settings is returned.
163 sub get_elasticsearch_settings {
166 # Use state to speed up repeated calls
167 state $settings = undef;
168 if (!defined $settings) {
169 my $config_file = C4::Context->config('elasticsearch_index_config');
170 $config_file ||= C4::Context->config('intranetdir') . '/admin/searchengine/elasticsearch/index_config.yaml';
171 $settings = LoadFile( $config_file );
177 =head2 get_elasticsearch_mappings
179 my $mappings = $self->get_elasticsearch_mappings();
181 This provides the mappings that get passed to Elasticsearch when an index is
186 sub get_elasticsearch_mappings {
189 # Use state to speed up repeated calls
193 if (!defined $all_mappings{$self->index}) {
194 $sort_fields{$self->index} = {};
196 data => scalar _get_elasticsearch_mapping('general', '')
198 my $marcflavour = lc C4::Context->preference('marcflavour');
199 $self->_foreach_mapping(
201 my ( $name, $type, $facet, $suggestible, $sort, $marc_type ) = @_;
202 return if $marc_type ne $marcflavour;
203 # TODO if this gets any sort of complexity to it, it should
204 # be broken out into its own function.
206 # TODO be aware of date formats, but this requires pre-parsing
207 # as ES will simply reject anything with an invalid date.
208 my $es_type = 'text';
209 if ($type eq 'boolean') {
210 $es_type = 'boolean';
211 } elsif ($type eq 'number' || $type eq 'sum') {
212 $es_type = 'integer';
213 } elsif ($type eq 'isbn' || $type eq 'stdno') {
217 $mappings->{data}{properties}{$name} = _get_elasticsearch_mapping('search', $es_type);
220 $mappings->{data}{properties}{ $name . '__facet' } = _get_elasticsearch_mapping('facet', $es_type);
223 $mappings->{data}{properties}{ $name . '__suggestion' } = _get_elasticsearch_mapping('suggestible', $es_type);
225 # Sort is a bit special as it can be true, false, undef.
226 # We care about "true" or "undef",
227 # "undef" means to do the default thing, which is make it sortable.
228 if (!defined $sort || $sort) {
229 $mappings->{data}{properties}{ $name . '__sort' } = _get_elasticsearch_mapping('sort', $es_type);
230 $sort_fields{$self->index}{$name} = 1;
234 $all_mappings{$self->index} = $mappings;
236 $self->sort_fields(\%{$sort_fields{$self->index}});
238 return $all_mappings{$self->index};
241 =head2 _get_elasticsearch_mapping
243 Get the Elasticsearch mappings for the given purpose and data type.
245 $mapping = _get_elasticsearch_mapping('search', 'text');
249 sub _get_elasticsearch_mapping {
251 my ( $purpose, $type ) = @_;
253 # Use state to speed up repeated calls
254 state $settings = undef;
255 if (!defined $settings) {
256 my $config_file = C4::Context->config('elasticsearch_field_config');
257 $config_file ||= C4::Context->config('intranetdir') . '/admin/searchengine/elasticsearch/field_config.yaml';
258 $settings = LoadFile( $config_file );
261 if (!defined $settings->{$purpose}) {
262 die "Field purpose $purpose not defined in field config";
265 return $settings->{$purpose};
267 if (defined $settings->{$purpose}{$type}) {
268 return $settings->{$purpose}{$type};
270 if (defined $settings->{$purpose}{'default'}) {
271 return $settings->{$purpose}{'default'};
276 sub reset_elasticsearch_mappings {
277 my ( $reset_fields ) = @_;
278 my $mappings_yaml = C4::Context->config('elasticsearch_index_mappings');
279 $mappings_yaml ||= C4::Context->config('intranetdir') . '/admin/searchengine/elasticsearch/mappings.yaml';
280 my $indexes = LoadFile( $mappings_yaml );
282 while ( my ( $index_name, $fields ) = each %$indexes ) {
283 while ( my ( $field_name, $data ) = each %$fields ) {
284 my $field_type = $data->{type};
285 my $field_label = $data->{label};
286 my $mappings = $data->{mappings};
287 my $facet_order = $data->{facet_order};
288 my $search_field = Koha::SearchFields->find_or_create({ name => $field_name });
289 $search_field->update(
291 label => $field_label,
293 facet_order => $facet_order
296 for my $mapping ( @$mappings ) {
297 my $marc_field = Koha::SearchMarcMaps->find_or_create({ index_name => $index_name, marc_type => $mapping->{marc_type}, marc_field => $mapping->{marc_field} });
298 $search_field->add_to_search_marc_maps($marc_field, { facet => $mapping->{facet} || 0, suggestible => $mapping->{suggestible} || 0, sort => $mapping->{sort} } );
304 # This overrides the accessor provided by Class::Accessor so that if
305 # sort_fields isn't set, then it'll generate it.
309 $self->_sort_fields_accessor(@_);
312 my $val = $self->_sort_fields_accessor();
315 # This will populate the accessor as a side effect
316 $self->get_elasticsearch_mappings();
317 return $self->_sort_fields_accessor();
320 =head2 _process_mappings($mappings, $data, $record_document, $altscript)
322 $self->_process_mappings($mappings, $marc_field_data, $record_document, 0)
324 Process all C<$mappings> targets operating on a specific MARC field C<$data>.
325 Since we group all mappings by MARC field targets C<$mappings> will contain
326 all targets for C<$data> and thus we need to fetch the MARC field only once.
327 C<$mappings> will be applied to C<$record_document> and new field values added.
328 The method has no return value.
334 Arrayref of mappings containing arrayrefs in the format
335 [C<$target>, C<$options>] where C<$target> is the name of the target field and
336 C<$options> is a hashref containing processing directives for this particular
341 The source data from a MARC record field.
343 =item C<$record_document>
345 Hashref representing the Elasticsearch document on which mappings should be
350 A boolean value indicating whether an alternate script presentation is being
357 sub _process_mappings {
358 my ($_self, $mappings, $data, $record_document, $altscript) = @_;
359 foreach my $mapping (@{$mappings}) {
360 my ($target, $options) = @{$mapping};
362 # Don't process sort fields for alternate scripts
363 my $sort = $target =~ /__sort$/;
364 if ($sort && $altscript) {
368 # Copy (scalar) data since can have multiple targets
369 # with differing options for (possibly) mutating data
370 # so need a different copy for each
372 $record_document->{$target} //= [];
373 if (defined $options->{substr}) {
374 my ($start, $length) = @{$options->{substr}};
375 $_data = length($data) > $start ? substr $data, $start, $length : '';
377 if (defined $options->{value_callbacks}) {
378 $_data = reduce { $b->($a) } ($_data, @{$options->{value_callbacks}});
380 if (defined $options->{property}) {
382 $options->{property} => $_data
385 push @{$record_document->{$target}}, $_data;
389 =head2 marc_records_to_documents($marc_records)
391 my @record_documents = $self->marc_records_to_documents($marc_records);
393 Using mappings stored in database convert C<$marc_records> to Elasticsearch documents.
395 Returns array of hash references, representing Elasticsearch documents,
396 acceptable as body payload in C<Search::Elasticsearch> requests.
400 =item C<$marc_documents>
402 Reference to array of C<MARC::Record> objects to be converted to Elasticsearch documents.
408 sub marc_records_to_documents {
409 my ($self, $records) = @_;
410 my $rules = $self->_get_marc_mapping_rules();
411 my $control_fields_rules = $rules->{control_fields};
412 my $data_fields_rules = $rules->{data_fields};
413 my $marcflavour = lc C4::Context->preference('marcflavour');
415 my @record_documents;
417 foreach my $record (@{$records}) {
418 my $record_document = {};
419 my $mappings = $rules->{leader};
421 $self->_process_mappings($mappings, $record->leader(), $record_document, 0);
423 foreach my $field ($record->fields()) {
424 if ($field->is_control_field()) {
425 my $mappings = $control_fields_rules->{$field->tag()};
427 $self->_process_mappings($mappings, $field->data(), $record_document, 0);
431 my $tag = $field->tag();
432 # Handle alternate scripts in MARC 21
434 if ($marcflavour eq 'marc21' && $tag eq '880') {
435 my $sub6 = $field->subfield('6');
436 if ($sub6 =~ /^(...)-\d+/) {
442 my $data_field_rules = $data_fields_rules->{$tag};
444 if ($data_field_rules) {
445 my $subfields_mappings = $data_field_rules->{subfields};
446 my $wildcard_mappings = $subfields_mappings->{'*'};
447 foreach my $subfield ($field->subfields()) {
448 my ($code, $data) = @{$subfield};
449 my $mappings = $subfields_mappings->{$code} // [];
450 if ($wildcard_mappings) {
451 $mappings = [@{$mappings}, @{$wildcard_mappings}];
454 $self->_process_mappings($mappings, $data, $record_document, $altscript);
458 my $subfields_join_mappings = $data_field_rules->{subfields_join};
459 if ($subfields_join_mappings) {
460 foreach my $subfields_group (keys %{$subfields_join_mappings}) {
461 # Map each subfield to values, remove empty values, join with space
466 map { join(' ', $field->subfield($_)) } split(//, $subfields_group)
470 $self->_process_mappings($subfields_join_mappings->{$subfields_group}, $data, $record_document, $altscript);
477 foreach my $field (keys %{$rules->{defaults}}) {
478 unless (defined $record_document->{$field}) {
479 $record_document->{$field} = $rules->{defaults}->{$field};
482 foreach my $field (@{$rules->{sum}}) {
483 if (defined $record_document->{$field}) {
484 # TODO: validate numeric? filter?
485 # TODO: Or should only accept fields without nested values?
486 # TODO: Quick and dirty, improve if needed
487 $record_document->{$field} = sum0(grep { !ref($_) && m/\d+(\.\d+)?/} @{$record_document->{$field}});
490 # Index all applicable ISBN forms (ISBN-10 and ISBN-13 with and without dashes)
491 foreach my $field (@{$rules->{isbn}}) {
492 if (defined $record_document->{$field}) {
494 foreach my $input_isbn (@{$record_document->{$field}}) {
495 my $isbn = Business::ISBN->new($input_isbn);
496 if (defined $isbn && $isbn->is_valid) {
497 my $isbn13 = $isbn->as_isbn13->as_string;
498 push @isbns, $isbn13;
500 push @isbns, $isbn13;
502 my $isbn10 = $isbn->as_isbn10;
504 $isbn10 = $isbn10->as_string;
505 push @isbns, $isbn10;
507 push @isbns, $isbn10;
510 push @isbns, $input_isbn;
513 $record_document->{$field} = \@isbns;
517 # Remove duplicate values and collapse sort fields
518 foreach my $field (keys %{$record_document}) {
519 if (ref($record_document->{$field}) eq 'ARRAY') {
520 @{$record_document->{$field}} = do {
522 grep { !$seen{ref($_) eq 'HASH' && defined $_->{input} ? $_->{input} : $_}++ } @{$record_document->{$field}};
524 if ($field =~ /__sort$/) {
525 # Make sure to keep the sort field length sensible. 255 was chosen as a nice round value.
526 $record_document->{$field} = [substr(join(' ', @{$record_document->{$field}}), 0, 255)];
531 # TODO: Perhaps should check if $records_document non empty, but really should never be the case
532 $record->encoding('UTF-8');
535 # Temporarily intercept all warn signals (MARC::Record carps when record length > 99999)
536 local $SIG{__WARN__} = sub {
537 push @warnings, $_[0];
539 $record_document->{'marc_data'} = encode_base64(encode('UTF-8', $record->as_usmarc()));
542 # Suppress warnings if record length exceeded
543 unless (substr($record->leader(), 0, 5) eq '99999') {
544 foreach my $warning (@warnings) {
548 $record_document->{'marc_data'} = $record->as_xml_record($marcflavour);
549 $record_document->{'marc_format'} = 'MARCXML';
552 $record_document->{'marc_format'} = 'base64ISO2709';
554 my $id = $record->subfield('999', 'c');
555 push @record_documents, [$id, $record_document];
557 return \@record_documents;
560 =head2 _field_mappings($facet, $suggestible, $sort, $target_name, $target_type, $range)
562 my @mappings = _field_mappings($facet, $suggestible, $sort, $target_name, $target_type, $range)
564 Get mappings, an internal data structure later used by
565 L<_process_mappings($mappings, $data, $record_document, $altscript)> to process MARC target
566 data for a MARC mapping.
568 The returned C<$mappings> is not to to be confused with mappings provided by
569 C<_foreach_mapping>, rather this sub accepts properties from a mapping as
570 provided by C<_foreach_mapping> and expands it to this internal data structure.
571 In the caller context (C<_get_marc_mapping_rules>) the returned C<@mappings>
572 is then applied to each MARC target (leader, control field data, subfield or
573 joined subfields) and integrated into the mapping rules data structure used in
574 C<marc_records_to_documents> to transform MARC records into Elasticsearch
581 Boolean indicating whether to create a facet field for this mapping.
583 =item C<$suggestible>
585 Boolean indicating whether to create a suggestion field for this mapping.
589 Boolean indicating whether to create a sort field for this mapping.
591 =item C<$target_name>
593 Elasticsearch document target field name.
595 =item C<$target_type>
597 Elasticsearch document target field type.
601 An optional range as a string in the format "<START>-<END>" or "<START>",
602 where "<START>" and "<END>" are integers specifying a range that will be used
603 for extracting a substring from MARC data as Elasticsearch field target value.
605 The first character position is "1", and the range is inclusive,
606 so "1-3" means the first three characters of MARC data.
608 If only "<START>" is provided only one character at position "<START>" will
615 sub _field_mappings {
616 my ($_self, $facet, $suggestible, $sort, $target_name, $target_type, $range) = @_;
617 my %mapping_defaults = ();
620 my $substr_args = undef;
622 # TODO: use value_callback instead?
623 my ($start, $end) = map(int, split /-/, $range, 2);
624 $substr_args = [$start];
625 push @{$substr_args}, (defined $end ? $end - $start + 1 : 1);
627 my $default_options = {};
629 $default_options->{substr} = $substr_args;
632 # TODO: Should probably have per type value callback/hook
633 # but hard code for now
634 if ($target_type eq 'boolean') {
635 $default_options->{value_callbacks} //= [];
636 push @{$default_options->{value_callbacks}}, sub {
638 # Trim whitespace at both ends
639 $value =~ s/^\s+|\s+$//g;
640 return $value ? 'true' : 'false';
644 my $mapping = [$target_name, $default_options];
645 push @mappings, $mapping;
648 push @suffixes, 'facet' if $facet;
649 push @suffixes, 'suggestion' if $suggestible;
650 push @suffixes, 'sort' if !defined $sort || $sort;
652 foreach my $suffix (@suffixes) {
653 my $mapping = ["${target_name}__$suffix"];
654 # TODO: Hack, fix later in less hideous manner
655 if ($suffix eq 'suggestion') {
656 push @{$mapping}, {%{$default_options}, property => 'input'};
659 push @{$mapping}, $default_options;
661 push @mappings, $mapping;
666 =head2 _get_marc_mapping_rules
668 my $mapping_rules = $self->_get_marc_mapping_rules()
670 Generates rules from mappings stored in database for MARC records to Elasticsearch JSON document conversion.
672 Since field retrieval is slow in C<MARC::Records> (all fields are itereted through for
673 each call to C<MARC::Record>->field) we create an optimized structure of mapping
674 rules keyed by MARC field tags holding all the mapping rules for that particular tag.
676 We can then iterate through all MARC fields for each record and apply all relevant
677 rules once per fields instead of retreiving fields multiple times for each mapping rule
678 which is terribly slow.
682 # TODO: This structure can be used for processing multiple MARC::Records so is currently
683 # rebuilt for each batch. Since it is cacheable it could also be stored in an in
684 # memory cache which it is currently not. The performance gain of caching
685 # would probably be marginal, but to do this could be a further improvement.
687 sub _get_marc_mapping_rules {
689 my $marcflavour = lc C4::Context->preference('marcflavour');
690 my $field_spec_regexp = qr/^([0-9]{3})([()0-9a-z]+)?(?:_\/(\d+(?:-\d+)?))?$/;
691 my $leader_regexp = qr/^leader(?:_\/(\d+(?:-\d+)?))?$/;
694 'control_fields' => {},
701 $self->_foreach_mapping(sub {
702 my ($name, $type, $facet, $suggestible, $sort, $marc_type, $marc_field) = @_;
703 return if $marc_type ne $marcflavour;
705 if ($type eq 'sum') {
706 push @{$rules->{sum}}, $name;
708 elsif ($type eq 'isbn') {
709 push @{$rules->{isbn}}, $name;
711 elsif ($type eq 'boolean') {
712 # boolean gets special handling, if value doesn't exist for a field,
714 $rules->{defaults}->{$name} = 'false';
717 if ($marc_field =~ $field_spec_regexp) {
722 # Parse and separate subfields form subfield groups
724 my $subfield_group = '';
727 foreach my $token (split //, $2) {
730 Koha::Exceptions::Elasticsearch::MARCFieldExprParseError->throw(
731 "Unmatched opening parenthesis for $marc_field"
738 elsif ($token eq ")") {
740 if ($subfield_group) {
741 push @subfield_groups, $subfield_group;
742 $subfield_group = '';
747 Koha::Exceptions::Elasticsearch::MARCFieldExprParseError->throw(
748 "Unmatched closing parenthesis for $marc_field"
752 elsif ($open_group) {
753 $subfield_group .= $token;
756 push @subfields, $token;
761 push @subfields, '*';
764 my $range = defined $3 ? $3 : undef;
765 my @mappings = $self->_field_mappings($facet, $suggestible, $sort, $name, $type, $range);
767 if ($field_tag < 10) {
768 $rules->{control_fields}->{$field_tag} //= [];
769 push @{$rules->{control_fields}->{$field_tag}}, @mappings;
772 $rules->{data_fields}->{$field_tag} //= {};
773 foreach my $subfield (@subfields) {
774 $rules->{data_fields}->{$field_tag}->{subfields}->{$subfield} //= [];
775 push @{$rules->{data_fields}->{$field_tag}->{subfields}->{$subfield}}, @mappings;
777 foreach my $subfield_group (@subfield_groups) {
778 $rules->{data_fields}->{$field_tag}->{subfields_join}->{$subfield_group} //= [];
779 push @{$rules->{data_fields}->{$field_tag}->{subfields_join}->{$subfield_group}}, @mappings;
783 elsif ($marc_field =~ $leader_regexp) {
784 my $range = defined $1 ? $1 : undef;
785 my @mappings = $self->_field_mappings($facet, $suggestible, $sort, $name, $type, $range);
786 push @{$rules->{leader}}, @mappings;
789 Koha::Exceptions::Elasticsearch::MARCFieldExprParseError->throw(
790 "Invalid MARC field expression: $marc_field"
797 =head2 _foreach_mapping
799 $self->_foreach_mapping(
801 my ( $name, $type, $facet, $suggestible, $sort, $marc_type,
804 return unless $marc_type eq 'marc21';
805 print "Data comes from: " . $marc_field . "\n";
809 This allows you to apply a function to each entry in the elasticsearch mappings
810 table, in order to build the mappings for whatever is needed.
812 In the provided function, the files are:
818 The field name for elasticsearch (corresponds to the 'mapping' column in the
823 The type for this value, e.g. 'string'.
827 True if this value should be facetised. This only really makes sense if the
828 field is understood by the facet processing code anyway.
832 True if this is a field that a) needs special sort handling, and b) if it
833 should be sorted on. False if a) but not b). Undef if not a). This allows,
834 for example, author to be sorted on but not everything marked with "author"
835 to be included in that sort.
839 A string that indicates the MARC type that this mapping is for, e.g. 'marc21',
840 'unimarc', 'normarc'.
844 A string that describes the MARC field that contains the data to extract.
845 These are of a form suited to Catmandu's MARC fixers.
851 sub _foreach_mapping {
852 my ( $self, $sub ) = @_;
854 # TODO use a caching framework here
855 my $search_fields = Koha::Database->schema->resultset('SearchField')->search(
857 'search_marc_map.index_name' => $self->index,
859 { join => { search_marc_to_fields => 'search_marc_map' },
861 'search_marc_to_fields.facet',
862 'search_marc_to_fields.suggestible',
863 'search_marc_to_fields.sort',
864 'search_marc_map.marc_type',
865 'search_marc_map.marc_field',
877 while ( my $search_field = $search_fields->next ) {
879 # Force lower case on indexed field names for case insensitive
880 # field name searches
881 lc($search_field->name),
883 $search_field->get_column('facet'),
884 $search_field->get_column('suggestible'),
885 $search_field->get_column('sort'),
886 $search_field->get_column('marc_type'),
887 $search_field->get_column('marc_field'),
894 die process_error($@);
896 This parses an Elasticsearch error message and produces a human-readable
897 result from it. This result is probably missing all the useful information
898 that you might want in diagnosing an issue, so the warning is also logged.
900 Note that currently the resulting message is not internationalised. This
901 will happen eventually by some method or other.
906 my ($self, $msg) = @_;
908 warn $msg; # simple logging
910 # This is super-primitive
911 return "Unable to understand your search query, please rephrase and try again.\n" if $msg =~ /ParseException/;
913 return "Unable to perform your search. Please try again.\n";
916 =head2 _read_configuration
918 my $conf = _read_configuration();
920 Reads the I<configuration file> and returns a hash structure with the
921 configuration information. It raises an exception if mandatory entries
924 The hashref structure has the following form:
927 'nodes' => ['127.0.0.1:9200', 'anotherserver:9200'],
928 'index_name' => 'koha_instance',
931 This is configured by the following in the C<config> block in koha-conf.xml:
934 <server>127.0.0.1:9200</server>
935 <server>anotherserver:9200</server>
936 <index_name>koha_instance</index_name>
941 sub _read_configuration {
945 my $conf = C4::Context->config('elasticsearch');
946 Koha::Exceptions::Config::MissingEntry->throw(
947 "Missing 'elasticsearch' block in config file")
948 unless defined $conf;
950 if ( $conf && $conf->{server} ) {
951 my $nodes = $conf->{server};
952 if ( ref($nodes) eq 'ARRAY' ) {
953 $configuration->{nodes} = $nodes;
956 $configuration->{nodes} = [$nodes];
960 Koha::Exceptions::Config::MissingEntry->throw(
961 "Missing 'server' entry in config file for elasticsearch");
964 if ( defined $conf->{index_name} ) {
965 $configuration->{index_name} = $conf->{index_name};
968 Koha::Exceptions::Config::MissingEntry->throw(
969 "Missing 'index_name' entry in config file for elasticsearch");
972 return $configuration;
975 =head2 get_facetable_fields
977 my @facetable_fields = Koha::SearchEngine::Elasticsearch->get_facetable_fields();
979 Returns the list of Koha::SearchFields marked to be faceted in the ES configuration
983 sub get_facetable_fields {
986 # These should correspond to the ES field names, as opposed to the CCL
987 # things that zebra uses.
988 my @search_field_names = qw( author itype location su-geo title-series subject ccode holdingbranch homebranch );
989 my @faceted_fields = Koha::SearchFields->search(
990 { name => { -in => \@search_field_names }, facet_order => { '!=' => undef } }, { order_by => ['facet_order'] }
992 my @not_faceted_fields = Koha::SearchFields->search(
993 { name => { -in => \@search_field_names }, facet_order => undef }, { order_by => ['facet_order'] }
995 # This could certainly be improved
996 return ( @faceted_fields, @not_faceted_fields );
1007 =item Chris Cormack C<< <chrisc@catalyst.net.nz> >>
1009 =item Robin Sheat C<< <robin@catalyst.net.nz> >>
1011 =item Jonathan Druart C<< <jonathan.druart@bugs.koha-community.org> >>