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[EP-tech] Re: multilang eprints.* fields show up as HASH(0xhexnumber) in html head

If anybody cares, those meta fields are generated in
EPrints/Plugin/Export/Simple.pm and attached patch adds multilang
support by simple copy/paste from DC.pm

2012/3/2 Dobrica Pavlinušić <dpavlin@gmail.com>:
> We are using eprints 3.3.8 from Debian package and decided to use
> multilang fields for title, keywords and abstracts to provide English
> translation along with our Croatian originals.
>
> However, when EPrints generates <meta> tags we get something like this:
>
> <meta name="eprints.title" content="HASH(0xfc3107a8)" />
> <meta name="eprints.ispublished" content="submitted" />
> <meta name="eprints.subjects" content="SOC" />
> <meta name="eprints.full_text_status" content="public" />
> <meta name="eprints.keywords" content="HASH(0xfc236248)" />
> <meta name="eprints.keywords" content="HASH(0xfc301f40)" />
> <meta name="eprints.abstract" content="HASH(0xfc315c48)" />
> <meta name="eprints.abstract" content="HASH(0xfc330770)" />
>
> This makes *some* sense, because we have one title, and multilang
> keywords and abstract for this entry, however I would love to have
> text inside content. This is especially bad for Google Scholar and
> other crawlers (including Zoterro) which seem to prefer eprints.* meta
> fields as opposed to DC.title and/or DC.subject.
>
> I should also stress out that DC.* meta fileds are correctly generated
> (once, using default language to select one of available values).
>
> I did try to find my way through source code using grep, but I'm stuck
> where to look. Any help is greatly appreciated.
>
> --
>  ...2share!2flame... http://blog.rot13.org
>
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-- 
 ...2share!2flame... http://blog.rot13.org

diff --git a/eprints/usr/share/eprints3/perl_lib/EPrints/Plugin/Export/Simple.pm b/eprints/usr/share/eprints3/perl_lib/EPrints/Plugin/Export/Simple.pm
index 05b58d5..f0fe572 100644
--- a/eprints/usr/share/eprints3/perl_lib/EPrints/Plugin/Export/Simple.pm
+++ b/eprints/usr/share/eprints3/perl_lib/EPrints/Plugin/Export/Simple.pm
@@ -120,7 +120,19 @@ referencetext / )
 		next unless $eprint->is_set( $fieldname );
 		my $field = $dataset->get_field( $fieldname );
 		my $value = $eprint->get_value( $fieldname );
-		if( $field->get_property( "multiple" ) )
+		if( $field->isa( "EPrints::MetaField::Multilang" ) )
+		{
+			my( $values, $langs ) =
+				map { $_->get_value( $eprint ) }
+				@{$field->property( "fields_cache" )};
+			$values = [$values] if ref($values) ne "ARRAY";
+			$langs = [$langs] if ref($values) ne "ARRAY";
+			foreach my $i (0..$#$values)
+			{
+				push @epdata, [ $fieldname, $values->[$i] ]; #, { lang => $langs->[$i] } ];
+			}
+		}
+		elsif( $field->get_property( "multiple" ) )
 		{
 			foreach my $item ( @{$value} )
 			{