[EP-tech] Re: plugin_alias_map restrictions?

Alan.Stiles Alan.Stiles at open.ac.uk
Fri Feb 28 11:16:22 GMT 2014


Hi Seb,

So, in an attempt to understand the workings of this, trying to replace the render_title in the Screen::EPrint  object by defining a local 'Screen::LocalEprint' package containing a render_title method doesn't work, because the Edit screen is essentially already defined as a child of the original EPrint definition before the alias mapping takes effect?  So you need to replace/create the method in the specific class that is being instantiated?  (I've probably just mashed up some OO terminology quite badly there!)

Alan

-----Original Message-----
From: Sebastien Francois [mailto:sf2 at ecs.soton.ac.uk]
Sent: 28 February 2014 10:56
To: eprints-tech at ecs.soton.ac.uk
Subject: [EP-tech] Re: plugin_alias_map restrictions?

Should look something like:

e.g. in archives/<id>/cfg/plugins/EPrints/Plugin/Screen/EPrint/LocalEdit.pm

#code-start
package EPrints::Plugin::Screen::EPrint::LocalEdit;

@ISA = ( 'EPrints::Plugin::Screen::EPrint::Edit' );

use strict;

sub render_title
{
     # whatever you need to do
}

1;
#code-end


in the conf (e.g. archives/<id>/cfg/cfg.d/plugins.pl):

$c->{plugin_alias_map}->{"Screen::EPrint::Edit"} = "Screen::EPrint::LocalEdit"; $c->{plugin_alias_map}->{"Screen::EPrint::LocalEdit"} = undef;


Then when EPrints calls Screen::EPrint::Edit, it will call your
LocalEdit plug-in instead, in a transparent manner.

Seb.


On 28/02/14 10:47, Andrew Beeken wrote:
> Hello! I’ve been working with archive localised plugins but have come up against one that’s giving me grief. I’m trying to extend Screen::EPrint with the intent of overriding the render_title function, adding the Eprint type to the output.
>
> I’ve gone through the motions of creating a new child plugin with all the correct dependencies, adding the alias map line into plugins.pl, however EPrints does not seem to be inheriting this plugin at all. Are there limitations on what can be changed this way?
>
> Andrew
>
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