[Koha-bugs] [Bug 31644] MARCModification template fails to copy to/from subfield 0

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=31644

--- Comment #4 from Nick Clemens <nick at bywatersolutions.com> ---
Created attachment 141093
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=141093&action=edit
Bug 31644: Add copy test and clarify some functions

This patch adds a tst for copy without subfields. I also clarify what eachstep
does
so the next user/coder understands current behaviour

Update existing or add new: In the case where the field/subfield exists
we update, if we have two fields - one with the subfield, and one without, we
add the subfield to the one without

Copy field:
 - If given a subfield - we will add to existing fields in the record
 - If not given a subfield - we create an entirely new field

The logic of all of this is tricky, makes sense in a certain light, any
complaints
are for a new bug :-)

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