Editing Contribute: Plugins/ImportPluginsCSV (section)

== Constructor ==
For import plugins we must set a 'produce' field, to tell the repository what kinds of objects the plugin can import. This plugin only supports importing lists of eprints, but if it supported importing individual eprints we could add 'dataobj/eprint' to this property. We would then have to implement the "input_dataobj" method. Most plugins implement this method, but it is rarely used in practice. Most imports are done in lists (even if that list only contains one member), via the import items screen.

<pre>
        $self->{produce} = [ 'list/eprint' ];
</pre>

Here we use a module that is not included with EPrints, Text::CSV, so we import it in a different way. First we check that it is installed, and load it if it is with "EPrints::Utils::require_if_exists".If it isn't we make the plugin invisible and produce an error message. It is good practice to import non-standard modules in this way rather than with "use".
<pre>
        my $rc = EPrints::Utils::require_if_exists('Text::CSV');
        unless( $rc )
        {
                $self->{visible} = '';
                $self->{error} = 'Failed to load required module Text::CSV';
        }
</pre>