Printing out Item Identifier on Item Browse Details Page

[Adina Langer]

Hello team Omeka developers.

I am trying to write a simple plugin that will add a line to the details view for item browse results with "ID: (the item id from Dublin Core)" I have attempted to use the item id helper function to call up the item ID and print it.  However, I get the following error message. "Notice: Undefined variable: id in /var/www/omeka/plugins/IdentifierAddOn/IdentifierAddOnPlugin.php on line 28 ID:"

Basically, I need to figure out how to define the id variable properly. You can see from the commented line 27 that I had attempted to use the language from the id helper to define my id variable, but that threw a fatal error...  Below is how my code looks now. Thanks for any advice.

`

<?php

/**

 * IdentifierAddOn * 

 * @copyright Copyright 2013 Adina Langer

 * @license http://www.gnu.org/licenses/gpl-3.0.txt GNU GPLv3

 */

/**

 * IdentifierAddOn Plugin.

 * @package Omeka\Plugins\IdentifierAddOn

 * 

 {*/

class IdentifierAddOnPlugin extends Omeka_Plugin_AbstractPlugin

{

protected $_hooks = array(

'admin_items_browse_detailed_each',

);

    /**

     * Prints out the Identifier on the admin browse results details  page.

     */

    

    public function hookAdminItemsBrowseDetailedEach($args)

{

   $item = $args['item'];

   // $id  = dig up the identifier

// $id = $item('ID');

   echo "ID: $id";

}

}

`

[Jeremy Boggs]

Should probably just have to replace $id = $item('ID') with $id = $item->id or $id = metadata($item, 'ID') in your hookAdminItemsBrowseDetailedEach method. Your $id isn't getting defined because $item() isn't the right syntax.

Jeremy

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[Adina Langer]

Thanks, Jeremy!  That's great.  Only catch is that I actually want the Dublin Core "identifier" value. Do you know where I can find the shorthand for this? "identifier" doesn't seem to be correct. 

[Patrick Murray-John]

For that, use $id = metadata($item, array('Dublin Core', 'Identifier'));

Basic pattern of metadata() is for the second parameter to be either the string for the property on the record (like the record's id), or an array for the element set and element as above.

[Adina Langer]

It works!  Thanks a bunch.