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[EP-tech] OAI : need some explanations about custom sets and filters



Hi Laurent,
The code that was in my head is below - does that make more sense (I only wrote it in an email - it might not be 100% right!)?

BUT:
*** I DON'T THINK THIS IS A GOOD IDEA ***
Setting the 'satisfy_all' on the search to 0 (an 'OR' join) would mean that the restriction on the eprint_status field would be an OR - and therefore records that matched another filter, but were in the inbox or review area would also be returned - and this is *NOT* what you need!

You could get round this by performing two searches - one on the archive dataset, and the other on the deletion dataset - and then combining both before outputting data.

Cheers,
John

############ Config #############
$oai->{custom_sets} = [
    {
        spec => "test_set",
        name => "test_set",
        filters => [
            { meta_fields => [ "full_text_status" ], value => "public", },
        ],
        satisfy_all => 0, #new option
        },
];

############ cgi/oai2 (see lines flagged with '## addition ##') #############
        push @$filters, {
                meta_fields => [qw( eprint_status )],
                value => "archive deletion",
                match => "EQ",
                merge => "ANY",
        };

        # custom sets
        my $satisfy_all = 1; ## addition ##
        if( defined $args->{set} )
        {
                my $custom_sets = $repo->config( "oai", "custom_sets" );
                my( $info ) = grep { $_->{spec} eq $args->{set} } @{$custom_sets||[]};
                if( defined $info )
                {
                        my $_filters = $info->{filters};
                        $_filters = [$info] if !defined $_filters;
                        push @$filters, @$_filters;
                        delete $args->{set};

                        $satisfy_all = $info->{satisfy_all} if defined $info->{satisfy_all};  ## addition ##
                }
        }

        my $searchexp = $ds->prepare_search(
                        allow_blank => 1,
                        filters => [
                                @{$filters},
                        ],
                        custom_order => "eprintid",
                        limit => ($PAGESIZE+1),
                        satisfy_all => $satisfy_all, ## addition ##
        );



-----Original Message-----
From: Laurent Cloarec [mailto:Laurent.Cloarec at ut-capitole.fr] 
Sent: 06 June 2018 10:02
To: John Salter <J.Salter at leeds.ac.uk>
Cc: eprints-tech at ecs.soton.ac.uk
Subject: [EP-tech] OAI : need some explanations about custom sets and filters

http://mailman.ecs.soton.ac.uk/pipermail/eprints-tech/2018-May/007320.html
[EP-tech] OAI : need some explanations about custom sets and filters

Hi

If EPrints::DataSet::prepare_search calls EPrints::Search::new, I don't see 
exactly how one could "define a key on the oai set config to switch satisfy_all 
between 1 and 0 as necessary" in such an overloading version of oai2 script...

Best regards
Laurent Cloarec


John Salter J.Salter at leeds.ac.uk
Tue May 29 19:39:04 BST 2018
> 
> Hi Laurent,
> 
> If I remember correctly, it's an 'AND' in the vanilla oai2 interface.
> 
> 
> From: [EPRINTS_ROOT]/cgi/oai2
> 
> 
> my $searchexp = $ds->prepare_search(
>                         allow_blank => 1,
>                         filters => [
>                                 @{$filters},
>                         ],
>                         custom_order => "eprintid",
>                         limit => ($PAGESIZE+1) );
> 
> 
> EPrints::DataSet::prepare_search calls EPrints::Search::new - the default setting for a search is 'satisfy_all' = 1.
> 
> 
> You could copy the cgi script above into:
> 
> [EPRINTS_ROOT]/archives/[ARCHIVEID]/cgi/oai2
> 
> and define a key on the oai set config to switch satisfy_all between 1 and 0 as necessary.
> 
> 
> I have not tried this. It's a possible solution for what you need - but entirely untested!
> 
> If it doesn't work, or you have other questions, let me know!
> 
> 
> Cheers,
> 
> John
> 
> PS You may also be interested in http://bazaar.eprints.org/411/ - which  flags anything that has a datestamp, but that is not currently live as 'deleted' in the OAI-PMH interface (which is more compliant with that standard).
> 
> The changes may have been merged into the core of EPrints - comparing the cgi/oai2 files should show if this is the case.
> 
> ________________________________
> From: eprints-tech-bounces at ecs.soton.ac.uk <eprints-tech-bounces at ecs.soton.ac.uk> on behalf of Laurent Cloarec <Laurent.Cloarec at ut-capitole.fr>
> Sent: 29 May 2018 14:47:52
> To: eprints-tech at ecs.soton.ac.uk
> Subject: [EP-tech] OAI : need some explanations about custom sets and filters
>> 
>> https://wiki.eprints.org/w/OAI
>> 
>> Hi there
>> 
>> As we do need to define an OAI custom set into our repository, I'd like to know
>> if the different filters criteria work only with an implicit "AND" operator
>> (unfortunately not "OR"), and if exists a negative operator (kind of "!=>")...
>> 
>> Regards
>> --
>> Laurent Cloarec
>> Service Commun de la Documentation - Service du Num?rique Documentaire
>> Universit? Toulouse 1 Capitole