[Koha-bugs] [Bug 33594] Sorting results by Title A-Z might use wrong title field

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33594

--- Comment #1 from Janusz Kaczmarek <januszop at gmail.com> ---
I have encountered this some time ago.  For me worked customizing the
mappings.yaml as follows:

       - facet: ''
         marc_field: 240
         marc_type: marc21
-        sort: ~
+        sort: ''
         suggestible: ''

I.e. changing ~ into '' for all MARC fields except 245. 

For some to-me-mysterious reason, ~ (= undef) is explicitly interpreted as
"yes, include it into the sort search field" by
Koha/SearchEngine/Elasticsearch.pm:

                # 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.


So, since this is by design and mappings.yaml is configurable, I didn't treat
it as a bug.  Just use a customized copy of mappings.

Please, check if changing ~ into '' works for you.  Please, consider also if it
is worth to be a bug.  If so, the solution is there.

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