Search posts with same taxonomy as visited post

[kyrian]

Hi,
looking at the settings I don’t think this is currently possible, but it would be interesting to have an option to auto-filter the search results dynamically depending on the category / tag of the visited post.
This could be used to show a “related posts” module for instance.

Is this something you plan to add in the future?

Thanks

[Ernest Marcinko]

Hi,

This is already possible via the plugin API, check this knowledge base.

[kyrian]

Thanks a lot!

[kyrian]

So after customizing this code in placing it in function.php, then I create a custom search form. But how do I tell this form to use the provided code to only search in the same taxonomy as the visited page?
This last step is not clear to me, sorry.

[Ernest Marcinko]

By default the code applies to all search bars. If you only need to apply to a specific search ID, then you can use the $sear_id variable to compare, like this:

add_filter( 'asp_query_args', 'asp_posts_from_same_cat', 10, 2 );
function asp_posts_from_same_cat($args, $search_id) {
	if ( $search_id == 1 ) {
		$taxonomy = 'category'; // Enter the taxonomy name

		// Do not change anything below
		$categories = wp_get_post_terms( $args['_page_id'], $taxonomy, array('fields' => 'ids') );
		if ( !is_wp_error($categories) && count($categories) ) {
			$args['post_tax_filter'][] = array(
			  'taxonomy'  => $taxonomy,    // taxonomy name
			  'include'   => $categories,   // array of taxonomy term IDs to include
			  'exclude'   => array(),
			  'allow_empty' => false        // allow (empty) items with no connection to any of the taxonomy terms filter
			);
		}
	}
	return $args;
}

In this case the code will apply for the search ID=1, and for the category taxonomy.

[kyrian]

now it’s clear, thanks

[Author]

Posts