LP#1749475 Protect against missing pubdate in biblio sort

The lack of date1 data in some records was causing this code to crash,
as an attempt was made to read textContent from nothingness.  Similar
to the publisher code right above, let's protect against such cases.

Signed-off-by: Dan Wells <dbw2@calvin.edu>

diff --git a/Open-ILS/src/perlmods/lib/OpenILS/Application/Trigger/Reactor.pm b/Open-ILS/src/perlmods/lib/OpenILS/Application/Trigger/Reactor.pm
index f011417..cb7d5b8 100644 (file)
--- a/Open-ILS/src/perlmods/lib/OpenILS/Application/Trigger/Reactor.pm
+++ b/Open-ILS/src/perlmods/lib/OpenILS/Application/Trigger/Reactor.pm
@@ -449,8 +449,9 @@ $_TT_helpers = {
                 $$bib{item_type} = $xml->findnodes('//*[local-name()="attributes"]/*[local-name()="field"][@name="item_type"]')->get_node(1)->getAttribute('coded-value');
                 my $p = $xml->findnodes('//*[@tag="260" or @tag="264"]/*[@code="b"]')->get_node(1);
                 $$bib{publisher} = $p ? $p->textContent : '';
-                $$bib{pubdatesort} = $$bib{pubdate} = $xml->findnodes('//*[local-name()="attributes"]/*[local-name()="field"][@name="date1"]')->get_node(1)->textContent;
-                $$bib{pubdatesort} = lc($$bib{pubdatesort});
+                my $pd = $xml->findnodes('//*[local-name()="attributes"]/*[local-name()="field"][@name="date1"]')->get_node(1);
+                $$bib{pubdate} = $pd ? $pd->textContent : '';
+                $$bib{pubdatesort} = lc($$bib{pubdate});
                 $$bib{isbn} = $xml->findnodes('//*[@tag="020"]/*[@code="a"]')->to_literal_delimited(', ');
                 $$bib{issn} = $xml->findnodes('//*[@tag="022"]/*[@code="a"]')->to_literal_delimited(', ');
                 $$bib{upc} = $xml->findnodes('//*[@tag="024"]/*[@code="a"]')->to_literal_delimited(', ');