I would like to set permissions on the attachments I add on an article. Is that possible? I don't want to hide the whole article, but just the attachments for public users.

You will need to create an override and wrap the part of item.php that displays the attachments with a test to discover the status or the user that is logged in and either display it or not
something like this should work

<?php $user =& JFactory::getUser(); ?>

<php if($user->get('guest') ==0 ): ?>
..../*Attachment Downloads Code*/
<?php endif; ?>

Hi. The code that William White posted should do the trick. Note however that this code only hides the attachments. If a guest user knows the download link of the attachment he can download it. In order to prevent this you need to write a K2 plugin which needs to be triggered on the "onK2BeforeDownload" event.

Thank you for the answers! I have tried it and it works.

hi

where can I import this code:

<?php $user =& JFactory::getUser(); ?>

<php if($user->get('guest') ==0 ): ?>
..../*Attachment Downloads Code*/
<?php endif; ?>

what line number?

This depends on the k2 version you are using, attach your item.php that you are using in an attachement here and we can tell you

my k2 version is 2.5.7

attached it.





too,I use alpha user point
say to me where should I import below code:

$api_AUP = JPATH_SITE.DS.'components'.DS.'com_alphauserpoints'.DS.'helper.php';
if ( file_exists($api_AUP))
{
require_once ($api_AUP);
$aupid = AlphaUserPointsHelper::getAnyUserReferreID( $userID );
if ( $aupid ) AlphaUserPointsHelper::newpoints( 'function_name', $aupid );
}

thanks a lot

You seem to be working with the wrong file,
Create an override (see documentation above for info)
Use the file
YourSiteRoot/templates/YourTemplate/com_k2/templates/YourOverrideName/item.php

no, I dont have such directory
?!!

this file is in
components/com_k2/models

Please see the documentation about k2 templates under documentation
also, see the movies in the documentation from ostraning which will walk you thru templating
before trying to make changes