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Gmedia photo gallery tags

Gmedia photo gallery gives a false impression of working with Relevanssi, as you can see the gmedia_tag taxonomy appear in the list of taxonomies:

Gmedia tags
gmedia_tag is listed in the list of taxonomies to index.

However, if you try to index those tags, you’ll soon notice Relevanssi isn’t actually indexing them. That’s because Gmedia gallery doesn’t use that taxonomy for the tags. The tags are actually in a separate, proprietary taxonomy Relevanssi won’t have access at all.

There is a solution, though. When indexing gallery photos, you can add a function that reads in the actual Gmedia tags, and adds them to the post content before it is indexed by Relevanssi. The code looks something like this:

add_filter( 'relevanssi_content_to_index', 'rlv_index_gmedia_tags', 10, 2 );
function rlv_index_gmedia_tags( $content, $post ) {
	if ( 'gmedia' === $post->post_type ) {
		$id = get_post_meta( $post->ID, '_gmedia_ID', true );
		if ( ! empty( $id ) ) {
			global $gmDB;
			$tags = $gmDB->get_the_gmedia_terms( $id, 'gmedia_tag' );
			if ( is_array( $tags ) ) {
				foreach ( $tags as $tag ) {
					$content .= $tag->name;
				}
			}
		}
	}
	return $content;
}

This checks the post type: if it’s gmedia, the photo ID in the Gmedia database is fetched from the _gmedia_ID custom field. That ID is then used to fetch the terms with $gmDB->get_the_gmedia_terms( $id, 'gmedia_tag' );. The terms are then looped through and the term name is added to the post content, where it will be indexed.

There’s lots of subtle finesses that are missing – this code will for example make your site crash if Gmedia is disabled at some point, but it should get you started with adding better support for Gmedia photo galleries.

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