Reply To: Filtering by relationship field in pre_get_posts on post archive page

• kstarcher

• October 6, 2017 at 4:16 am

Hmmm, spoke too soon. My code now works fine on post archive pages, but I need to add it to the CPT “events” as well, which uses the exact same set of custom fields. But this isn’t working. I can test and see that it is correctly triggering the various if statements, but it doesn’t seem that the meta query gets applied – it just returns all results, unfiltered. Posts are still working, though, with the exact code below. Does this sort of meta query get applied differently to a CPT than to the standard post?

function query_by_relationship( $query ) {
    
    if( is_admin() ) {
        return $query;
    }

    if ((is_archive() && $query->is_main_query()) || ( isset($query->query_vars['post_type']) && $query->query_vars['post_type'] == 'events' ) ) { 
        
        if( isset($_GET['sector']) ) {
            $meta_query = array(
                            array(
                                'key'       => 'related_industries',
                                'value' => '"' . $_GET['sector'] . '"',
                                'compare'   => 'LIKE',
                            )
                        );
            $query->set('meta_query', $meta_query);
        } else if( isset($_GET['pa']) ) {
            $meta_query = array(
                            array(
                                'key'       => 'related_practice_areas',
                                'value' => '"' . $_GET['pa'] . '"',
                                'compare'   => 'LIKE',
                            )
                        );
            $query->set('meta_query', $meta_query);
        } else if( isset($_GET['lawyer']) ) {
            $meta_query = array(
                            array(
                                'key'       => 'related_people',
                                'value' => '"' . $_GET['lawyer'] . '"',
                                'compare'   => 'LIKE',
                            )
                        );
            $query->set('meta_query', $meta_query);
        }
        
    }
    
    
    // return
    return $query;

}

add_action('pre_get_posts', 'query_by_relationship');