RE: SolrMARC - dynamic fields booleans and conditionals
Demian Katz
Does putting the 1 in double quotes make a difference?
I’m copying the solrmarc-tech list into this thread so people there can weigh in as well if my suggestion proves unhelpful.
- Demian
From: Katzmann, Michael <mk...@loc.gov>
Sent: Friday, February 22, 2019 10:10 AM
To: vufind-...@lists.sourceforge.net
Subject: [VuFind-General] SolrMARC - dynamic fields booleans and conditionals
I am trying to get a dynamic Boolean to work with a conditional in solrmarc.
No matter what I try, I get an error. Is it even possible to assign an Boolean with a conditional or does a conditional have to use the MARC field as is ?
LoC_reissue_bool = 1 ? (534c contains “reissue”)
I guess it’s treating ‘1’ as a marc field rather than a 1/0/t/f.
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Demian Katz
I suspected you probably had, but it never hurts to be sure. 😊
I imagine you’ve also tried literal “t” and “T” as alternatives to “1” but again I’ll mention them for the sake of comprehensiveness. 😊
Looking at the examples in the wiki, I don’t see any with string literals, which makes me wonder if perhaps that case is not supported (though I think it probably should be!). Perhaps Bob can weigh in on this situation; he’s much more familiar with these capabilities than I am.
In the meantime, if you’re really desperate, is there a way to cheat and specify a MARC field that’s always set to 1? For example, is there some position of the leader that can be relied on? I realize that’s a completely stupid hack and the mere suggestion may be harmful to my reputation, but for the purposes of testing the remainder of the expression, it might be interesting to try while waiting for a better (sane) answer. 😉
- Demian
From: Katzmann, Michael <mk...@loc.gov>
Sent: Friday, February 22, 2019 11:11 AM
To: Demian Katz <demia...@villanova.edu>
Subject: RE: SolrMARC - dynamic fields booleans and conditionals
No .. I thought of that 8-)
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Michael
Katzmann,
Chief, Materials Development Division
NLS/BPH
Library of Congress
Demian Katz
Yes, the pattern map solution is far less ridiculous than my proposed idea!
I would think that returning an appropriate string from SolrMarc should map appropriately to the Boolean value in Solr, but I’ve never tried it, so that may be blind optimism. I’ll be interested to hear your findings!
- Demian
From: Katzmann, Michael <mk...@loc.gov>
Sent: Friday, February 22, 2019 11:56 AM
To: Demian Katz <demia...@villanova.edu>
Cc: solrma...@googlegroups.com
Subject: RE: SolrMARC - dynamic fields booleans and conditionals
OK, yes I did try t and ‘t’. I also looked at the SolrMARC page and only saw direct assignment of a MARC field for a conditional.
I tried using a pattern match transformation =>1 (this didn’t seem to work yesterday but when I just tried it again it didn’t complain. I’ll check to see if it actually added the Boolean.)
I’m OK in adding a Java class but I’m not sure if I still return a string with “1” or some other type if it’s being assigned to a boolean. (I resume a string)
Michael
Haschart, Robert J (rh9ec)
The pattern map solution Demian mentions should work, mostly. It is relatively easy to have a LOC_reissue filed with a given value if field 534c exists and contains the text "reissue", and to NOT have that Solr field if the field 534c doesn't exist and/or doesn't contain the text "reissue"
LoC_reissue_bool = 534c, map("reissue=>true")
If you want a true/false value stored depending on whether that field exists and contains the desired value its a little harder, since since you'd have to write a Regex that matches all strings that do not contain a given string. And since if that field doesn't exist, the rule wouldn't be evaluated.
About the best I've been able to come up with, (which only works with the latest SolrMarc version (3.2) ) is to use the above line, followed by a rule that uses the new ?= operator (which adds a index value IFF there is no current value defined for that index field)
LoC_reissue_bool = 534c, map("reissue=>true")
LoC_reissue_bool ?= "false"
-Bob
Sent: Friday, February 22, 2019 11:58:10 AM
To: Katzmann, Michael
Cc: solrma...@googlegroups.com
Subject: [solrmarc-tech] RE: SolrMARC - dynamic fields booleans and conditionals
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Katzmann, Michael
OK, yes I did try t and ‘t’. I also looked at the SolrMARC page and only saw direct assignment of a MARC field for a conditional.
I tried using a pattern match transformation =>1 (this didn’t seem to work yesterday but when I just tried it again it didn’t complain. I’ll check to see if it actually added the Boolean.)
I’m OK in adding a Java class but I’m not sure if I still return a string with “1” or some other type if it’s being assigned to a boolean. (I resume a string)
Michael
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Katzmann, Michael
Thanks Bob, I tried your suggestion and it failed (at first) …
I looked at solr/vufind/biblio/conf/schema.xml and I think it needs to be _boolean (not _bool)
LoC_reissue_boolean = 534p, map("Reissue=>true")
Works…
I think the documentation page is incorrect
https://vufind.org/wiki/development:architecture:solr_index_schema
I’ll see if I can splice in the 3.2 jars to try your second suggestion.
Michael
---
Michael Katzmann,
Chief, Materials Development Division
NLS/BPH Library of Congress
📞+1 202.707.0701
📧
MK...@LoC.Gov
Demian Katz
Michael,
You are correct, there is a typo in the documentation – that’s gone a very long time without being caught. Sorry about that; it’s fixed now!
- Demian