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[EP-tech] Re: Writing slightly more complex searches



Given these two searches:

   my $search1 = EPrints::Search->new(
     satisfy_all => 1,
     session     => $session,
     dataset     => $dso,
   );
   $search1->add_field( $dso->get_field("published"), 'pub', 'EQ' );
   my $results1 = $search1->perform_search;

   my $search2 = EPrints::Search->new(
     satisfy_all => 1,
     session     => $session,
     dataset     => $dso,
   );
   $search2->add_field( $dso->get_field("refereed"), 'TRUE' );
   my $results2 = $search2->perform_search;

   my $results = $search1->union($search2, 'eprintid');

Why am I getting the error

   Can't locate object method "union" via package "EPrints::Search" at...

when I run the script?

(Eprints 3.3.12 and referring to 
http://wiki.eprints.org/w/API:EPrints/Search and 
http://wiki.eprints.org/w/API:EPrints/List )

-- 

Ian Stuart.
Developer: ORI, RJ-Broker, and OpenDepot.org
Bibliographics and Multimedia Service Delivery team,
EDINA,
The University of Edinburgh.

http://edina.ac.uk/

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