[Koha-bugs] [Bug 23029] New: OPAC Authorities Search. Internal Server Error. Free-floating subdivisions imported from LOC

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=23029

            Bug ID: 23029
           Summary: OPAC Authorities Search. Internal Server Error.
                    Free-floating subdivisions imported from LOC
 Change sponsored?: ---
           Product: Koha
           Version: 18.11
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5 - low
         Component: Searching
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: cbutosi at gmail.com
        QA Contact: testopia at bugs.koha-community.org
  Target Milestone: ---

Koha 18.11 on Ubuntu 16.04 (MariaDb) with Plack.
================================================

I recently discovered that the Library of Congress released their 2014
authorities as a free, open-access dataset in Marc8, xml, and Utf8 formats.
This is great!
(https://www.loc.gov/cds/products/MDSConnect-subject_authorities.html)

I have completed batch uploading the file successfully into Koha (about 320,000
records) and reindexed Zebra.

Part of the authority file includes free-floating subdivisions, identified by
the presence of a MARC21 authority tag 180.

I discovered an "Internal Server Error" page if I attempted to click on the
Details button of any of these sub-divisions' records in the OPAC authority
browse results page. My Plack error log reported the following error each time
I attempted to access the authorities details page from the OPAC:

"Can't call method "authtypetext" on an undefined value at
/usr/share/koha/opac/cgi-bin/opac/opac-authoritiesdetail.pl line 89."

I corrected this error by creating a new Authority Type using the pre-populated
value found in field 942 within these free-floating subdivision records (i.e.,
"GEN_SUBDIV") and assigning tag 180 as the "authority field to copy"

Once created, I was able to access the OPAC details page, as expected, and all
free-floating subdivisions were re-indexed as free-floating subdivisions. They
also became selectable as an authority type from the drop-down menu in the
Authority Search.

For a detailed explanation of the above, see:
http://craigbutosi.ca/2019/05/31/plack-error-authority-file-free-floating-subdivisions-koha-18-11/

The Authority Type GEN_SUBDIV should be defined in order to prevent the Plack
error from occurring.

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