[EP-tech] Re: Rendering a metafield - use different format in Listing and Abstract page

[J.Salter at leeds.ac.uk (John Salter)]

Hi Adam,
Thanks for the pointers.

I think I can achieve what I need through this ? but I don?t think I can order a review column based on a virtual field ? so I?ll have to make the default rendering be the list-style, and use the virtual field for the abstract page ? but that might also fall foul of your comment about epxml :o\

Cheers,
John



From: eprints-tech-bounces at ecs.soton.ac.uk [mailto:eprints-tech-bounces at ecs.soton.ac.uk] On Behalf Of Adam Field
Sent: 17 June 2015 19:42
To: eprints-tech at ecs.soton.ac.uk
Subject: [EP-tech] Re: Rendering a metafield - use different format in Listing and Abstract page

I've solved this problem by using a virtual field with a custom renderer.  The virtual field's render method reads the value from the actual field you're interested in and renders it differently.  The problem with virtual fields is that I think they're hard to test for in epxml (and possibly also with is_set).

You can see an example from the tweepository package here:

            https://github.com/gobfrey/tweepository/blob/master/cfg/cfg.d/z_tweepository_libs.pl#L314 (field definition)
            https://github.com/gobfrey/tweepository/blob/master/cfg/cfg.d/z_tweepository_libs.pl#L1710 (render method)

--
Adam Field
Business Relationship Manager and Community Lead
EPrints Services

On 17 Jun 2015, at 17:47, John Salter <J.Salter at leeds.ac.uk<mailto:J.Salter at leeds.ac.uk>> wrote:

Hi,
I'd like to be able to apply a different rendering to a field if it's being displayed in a listing (e.g. the Review screen) to how it gets rendered 'normally'.

In this specific case, a compound field is normally rendered as a table:
+----------+----------+
| Sub A    | Sub B    |
+----------+----------+
| Val 1A   | Val 1B   |
| Val 2A   | Val 2B   |
| Val 3A   | Val 3B   |
+----------+----------+

This rendering is OK on an abstract page, but when using the compound field as a review column, I want to render is as a list:
* Val 1B (Val 1A)
* Val 2B (Val 2A)
* Val 3B (Val 3A)

Is there a way (in the render_value of a field) to determine if the field is being rendered as part of a listing?
I've got access to the $session - so was thinking along the lines of (CAUTION: nonsense code!)
if( $session->{screen}->isa( "EPrints::Screen::Listing" ) ){
            #do list rendering
} else {
            #revert to normal table rendering
}

but I can't quite get my head around going from session to screen. Any pointers welcome!

I may be missing something obvious too - e.g. if there's a citation style that I should use to do this!

Cheers,
John



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