Getting Child Collection metadata - call to get_collection_by_id causes error

Omeka Classic Development
1

Hi there,

I’m modifying a theme’s collection/show page so that top-level collections are differentiated from child collections in their formatting. Top-level collections display a grid of child collections and child collections display items in a grid. In order to return metadata on a collection I have re-used the function presented in the old forum topic ‘Collection Tree: getting child collections’.

This function seems to work fine except when I try to call get_collection_by_id whereupon I get …

Fatal error : Call to undefined function get_collection_by_id()

… my code is as follows …

function Leeds_GATE_get_child_collections($collectionId) {
	if(plugin_is_active('CollectionTree')) {
            $treeChildren = get_db()->getTable('CollectionTree')->getChildCollections($collectionId);
            $childCollections = array();
            foreach($treeChildren as $treeChild) {
		
		echo '<li class="collection record">';
		
		$linkid = ($treeChild['id']);
		$linktext = ($treeChild['name']);

		echo "<a href='$linkid'>$linktext</a>";
		echo '<div class="img">';
		get_collection_image($linkid);
		echo '</div>';
		echo '</li>';


Causes error ----------->	$childCollections[] = get_collection_by_id($treeChild['id']);
		
            }
            return $childCollections;

	}
	return array();
    }


    $collectionId = metadata('collection', 'id'); 
    Leeds_GATE_get_child_collections($collectionId);

… I know the function is partly working as it is able to echo back data in the ‘CollectionTree’ table.

Any help would be appreciated.

Stephen

2

That’s quite an old forum topic.

get_collection_by_id doesn’t exist anymore, instead it’s get_record_by_id('collection', $id) (passing the ID you’re looking for as $id of course).

This and many other function name changes are listed on the “What’s new in 2.0” developer documentation.

1 Like
3

Thanks for the swift response.

Yes replacing the defunct ‘get_collection_by_id’ with ‘get_record_by_id(‘collection’, $id)’ worked. Thanks for the pointers to “What’s new in 2.0” developer documentation.

For reference the revised code which now works fine is as follows …

  <?php 

    function Leeds_GATE_get_child_collections($collectionId) {
	if(plugin_is_active('CollectionTree')) {
            $treeChildren = get_db()->getTable('CollectionTree')->getChildCollections($collectionId);
            $childCollections = array();
            foreach($treeChildren as $treeChild) {
		
		echo '<li class="collection record">';
		
		$linkid = ($treeChild['id']);
		
		set_current_record('collection', get_record_by_id('collection', $linkid));

		$linktext = metadata('collection', array('Leeds-GATE element set', 'GATE Title'));

		echo "<a href='$linkid'>$linktext</a>";

		echo '<div class="img">';
		get_collection_image($linkid);

		echo '</div>';
		echo '</li>';
		
            }
            return $childCollections;

	}
	return array();
    }

    $collectionId = metadata('collection', 'id'); 
    Leeds_GATE_get_child_collections($collectionId); 

    ?>

All the best

Stephen

1 Like