[Koha-bugs] [Bug 23089] New: Elasticsearch - cannot sort on non-text fields

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=23089

            Bug ID: 23089
           Summary: Elasticsearch - cannot sort on non-text fields
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5 - low
         Component: Searching - Elasticsearch
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: nick at bywatersolutions.com
  Target Milestone: ---

issues is defined as an sum field, this is interpreted to ES as integer,
however, the issues__sort field is stored as keyword.

Attempting to order search results by 'popularity' fails from ES - because we
can't use text fields, we have to use a 'keyword' field.

In our biblio search indexes this is fine because our __sort fields all get a
phrase keyword field


We onyl set field__sort.phrase for text fields though, so issues__sort doesn't
use the phrase field, even though it exists

Adding a test to try to ilustrate what I am saying here

To recreate:
1 - Enable and index ES
2 - Search on staff client or OPAC
3 - Attempt to sort by popularity
4 - It fails, check the error logs to see why

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