From 9c15db62e2665321254f015105ebc1da506d6b22 Mon Sep 17 00:00:00 2001
From: David Gustafsson <david.gustafsson@ub.gu.se>
Date: Thu, 2 Nov 2017 13:44:13 +0100
Subject: [PATCH] Bug 19563: Generation of sort_fields uses incorrect condition

Fix incorrect condition for if clause for generating <field>__sort mappings
for Elasticsearch. Also remove redundant check for same condition when
generating fixer rules.

Test plan:
1. Inspect current mappings for example by viewing: http://<elasticsearch_host>:9200/koha_<koha_instance_name>_biblios/_mapping.
2. If using the default configuraion only "author" has a sort field (author__sort).
4. Appy patch.
5. Reindex using rebuild_elastic_search.pl.
6. All fields except those with sort sort set to "0" should now have sort fields, which in the default configuration is all but "author".
---
 Koha/SearchEngine/Elasticsearch.pm | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/Koha/SearchEngine/Elasticsearch.pm b/Koha/SearchEngine/Elasticsearch.pm
index de4b18ce4d..2b2fd109e3 100644
--- a/Koha/SearchEngine/Elasticsearch.pm
+++ b/Koha/SearchEngine/Elasticsearch.pm
@@ -215,9 +215,10 @@ sub get_elasticsearch_mappings {
                     search_analyzer => 'simple',
                 };
             }
-            # Sort may be true, false, or undef. Here we care if it's
-            # anything other than undef.
-            if (defined $sort) {
+            # Sort is a bit special as it can be true, false, undef.
+            # We care about "true" or "undef",
+            # "undef" means to do the default thing, which is make it sortable.
+            if ($sort || !defined $sort) {
                 $mappings->{data}{properties}{ $name . '__sort' } = {
                     search_analyzer => "analyser_phrase",
                     analyzer  => "analyser_phrase",
@@ -346,14 +347,8 @@ sub get_fixer_rules {
             if ($type eq 'sum' ) {
                 push @rules, "sum('$name')";
             }
-            # Sort is a bit special as it can be true, false, undef. For
-            # fixer rules, we care about "true", or "undef" if there is
-            # special handling of this field from other one. "undef" means
-            # to do the default thing, which is make it sortable.
             if ($self->sort_fields()->{$name}) {
-                if ($sort || !defined $sort) {
-                    push @rules, "marc_map('$marc_field','${name}__sort.\$append', $options)";
-                }
+                push @rules, "marc_map('$marc_field','${name}__sort.\$append', $options)";
             }
         }
     );
-- 
2.11.0