[Koha-bugs] [Bug 28721] New: Holds Ratio fails when all copies are unavailable

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=28721

            Bug ID: 28721
           Summary: Holds Ratio fails when all copies are unavailable
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5 - low
         Component: Circulation
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: andrew at bywatersolutions.com
        QA Contact: testopia at bugs.koha-community.org
                CC: gmcharlt at gmail.com, kyle.m.hall at gmail.com

To recreate:
- find a bib with just 1 item on it
- confirm the item is not notforloan, damaged, lost, or withdrawn
- place 3 holds on the title
- go to the holds ratio in circulation, confirm your title shows when the ratio
is set to 3
- go back to your item, set it to lost
- reload the holds ratio, see your title is no longer listed

In the scenario above, we end up dividing by zero because there are no
available items. This messes up our ratio and makes this title not show as
needing more copies, even though our ratio is definitely less than 3 copies per
hold.

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