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Taxonomy tags not found in front-end

  • Hi,

    I’ve got a problem which is probably easy to solve, but I can’t get it done… 🙁

    I’m using custom post types with tags. When I add a tag in the back-end, let’s say “marketing”, I can see it on the front-end when I look at all the available tags. But not on a single (custom) post (type), then they are not visable. And if I click on a term and go to the page with all the posts containing that term ( it says: Nothing found.

    To be clear: if I add a term to a “normal” post (not a custom post type), it works as it should: tag term is visable on single post and when I click on the term I see an overview with posts with that tag term.

    At first I created the CPT with the following code:

    //Custom post type cases
    add_action('init', 'cases_register');
    function cases_register() {
        $args = array(
            'labels' => array(
    			'name' => __('Cases'),
    			'singular_name' => __('Case'),
    			'add_new' => __('Add case'),
    			'add_new_item' => __('Add case'),
    			'edit_item' => __('Edit case'),
    			'new_item' => __('New case'),
    			'all_items' => __('All cases'),
    			'view_item' => __('View case'),
    			'search_items' => __('Search case'),
    			'not_found' =>  __('No case found'),
    			'not_found_in_trash' => __('Nothing found in trash'),
    			'menu_name' => 'Cases'
            'public' => true,
            'show_ui' => true,
    	'publicly_queryable' => true,
    	'exclude_from_search' => false,
    	'query_var' => true,
    	'show_in_nav_menus' => true,
            'capability_type' => 'post',
            'hierarchical' => true,
            'rewrite' => true,
            'supports' => array('title', 'thumbnail', 'comments'),
    	'taxonomies' => array('cases', 'post_tag')
        register_post_type( 'cases' , $args );

    When this did not work I tried using the tags field in ACF. But the result is the same. It looks as if the tags are not “tied” to the custom posts.

    Anybody any ideas?


  • I seem to have solved this in the end. I added this code to my plugin:

    function wpa_cpt_tags( $query ) {
        if ( $query->is_tag() && $query->is_main_query() ) {
            $query->set( 'post_type', array( 'post', 'case' ) );
    add_action( 'pre_get_posts', 'wpa_cpt_tags' );

    This can also be added to functions.php.

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