[Koha-bugs] [Bug 26894] Marc Modification Templates treat subfield 0 as no subfield set when moving fields

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=26894

--- Comment #1 from Nick Clemens <nick at bywatersolutions.com> ---
Created attachment 112827
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=112827&action=edit
Bug 26894: Handle subfield 0 and delete empty fields

This patch corrects handling of subfield 0 when copying/moving. Before these
patches copying from subfield 0 would copy the entire field.

We also correct an error that if moving a single subfield, we can leave behind
empty
fields with no subfields. They should be deleted.

To test:
1 - Define a new MARC Modification template with actions:
        Delete field 100$0
        Add new field 100$0 with value Test
        Update existing or add new field 100$0 with value TestUpdated
        Move field 100$0 to 600$0
        Copy field 600$0 to 100$0
        Copy and replace field 245$0 to 700$0
2 - Define a new record like:
    LDR 00334nam a22001217a 4500
    003 ff
    005 20201102111604.0
    008 201102b        xxu||||| |||| 00| 0 eng d
    040 _ _ ‡cvsd
    100 1 _ ‡012345‡aKnuth, Donal Ervin‡d1938
    245 _ _ ‡012345‡aThe aty of computer programming‡cDonald E. Knuth
    650 _ 0 ‡042‡aComputer programming‡9462
3 - Modify this record using the template above
4 - Note that entier 245 is copied to 700, same for 600 field
5 - Apply patch
6 - Now only subfields 0 are copied

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