Hi Eric,
This has been my experience as well. I haven't found a way to modify
only one field when there are more that one of the same tag in the same
record.
Are the links you are trying to change all the same domain? Or a couple
of different domains? If so, you could match the regex on a longer part
of the URL e.g.
s/^https://some-online-resource.com/https://proxy.cca.edu/url?=https://some-online-resource.com
You can have many options in one modification template, so you can have
many "copy and replace" for various resources. Or you can do it by
batch. The latter is usually what I've done in the past: make a report
to have the URLs matching some-online-resource.com, batch modify those.
Then change the modification template, change the report to have the
URLs another-online-resource.com and batch modify those records, etc.
Good luck!
Caroline
On 2023-08-04 11:31, Eric Phetteplace wrote:
Hi collective wisdom,
I'm running into a MARC modification template problem and I can't tell if
I'm missing something or there's a bug/limitation. I know I could
accomplish these edits with MARCEdit or a script, but I was hoping to use
Koha's tools.
I have a record with two 856 fields with links, I want to apply our proxy
server prefix to one link but not the other. That seems to be impossible;
Koha clobbers the second link with a copy of the first. Here's a minimal
example.
Record
245 _ _ ‡aExample
856 4 0 ‡uhttps://example.com‡yLink to proxy
856 4 0 ‡uhttps://www.cca.edu‡yLink to retain
MARC modification
Copy and replace 1st field(s) 856 u to field 856 u Regex ✅ s/^http/
https://proxy.cca.edu/url?=http/
If field 856 u matches m/https://example.com/ Regex ✅
Output record
245 _aExample
856 40 _uhttps://proxy.cca.edu/url?=https://example.com
_yLink to proxy
856 40 _uhttps://proxy.cca.edu/url?=https://example.com
_yLink to retain
This happens whether I set the modification template to use the "1st" or
"every" 856 field. I don't understand why the second 856 is touched at
all, since it does not meet the "if" condition, much less why instead of
receiving its own link proxied it gets the first 856 URL proxied.
Based on a few tests, it also seems like the "1st" field with respect to
modification actions is not always the one that's visually first when I
edit a record. I tried a set of three actions which 1) copied the first
field to another, unused field, 2) modified it there, and then 3) copied it
back, but Koha copied the second field instead.
Best,
ERIC PHETTEPLACE Systems Librarian, Libraries (he/him)
ephettepl...@cca.edu
*CCA is situated on the traditional unceded lands of the **Chochenyo and
Ramaytush Ohlone** peoples.*
Black-owned bookstores in Oakland: Ashay by the Bay
<https://ashaybythebay.com/>, Marcus Books
<https://www.facebook.com/marcus.books/>
:(){ :|: & };:
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