Custom taxonomy in custom post type archive with pagination

Question

I have inmy opinion something simple that needs to be done but I can't get it to work.

I have a custom post type adm_project with rewrite => array('slug' => 'projecten')

add_action( 'init', 'adm_build_projecten_post_type', 0 );
function adm_build_projecten_post_type() {

    register_taxonomy(
        'project_werkgebied',
        'adm_project',
        array(
            'label' => 'Werkgebieden',
            'singular_label' => 'Werkgebied',
            'hierarchical' => true,
            'query_var' => true,
        )
    );

    $labels = array(
        'name'               => 'Projecten',
        'singular_name'      => 'Project',
        'menu_name'          => 'Projecten',
        'all_items'          => 'Alle Projecten',
        'add_new'            => 'Project toevoegen',
        'add_new_item'       => 'Nieuwe Project',
        'edit'               => 'Bewerken',
        'edit_item'          => 'Project bewerken',
        'new_item'           => 'Nieuwe Project',
        'view'               => 'Bekijken',
        'view_item'          => 'Bekijk Projecten',
        'search_items'       => 'Zoek Project',
        'not_found'          => 'Geen Project(en) gevonden',
        'not_found_in_trash' => 'Geen Project(en) in prullenbak gevonden',
        'parent'             => '',
    );

    $args = array(
        'label'               => 'Projecten',
        'labels'              => $labels,
        'supports'            => array( 'title', 'editor', 'thumbnail', 'excerpt' ),
        'hierarchical'        => false,
        'public'              => true,
        'show_ui'             => true,
        'show_in_menu'        => true,
        'show_in_nav_menus'   => true,
        'show_in_admin_bar'   => true,
        'menu_position'       => 20,
        'menu_icon'           => 'dashicons-hammer',
        'can_export'          => true,
        'has_archive'         => true,
        'exclude_from_search' => false,
        'publicly_queryable'  => true,
        'capability_type'     => 'page',
        'rewrite'             => array( 'slug' => 'projecten' )
    );

    register_post_type( 'adm_project', $args );

}

In the theme I have a file name archive-adm_project.php which shows all the projects including working pagination as wanted.

What I want is that when I go to

/projecten/%project_werkgebied%

it does exactly the same but only show projects that have the taxonomy that is in the url.

Answer 1

I've not seen a "clean" way to do this - happy to learn it from someone else if they know.

However, the way we've managed this in the past is to setup a page whose slug is 'projecten' with a custom page template that behaves and acts like an archive page. Then add child pages for each term (make sure to select the custom taxonomy for each term child page that relates - well this is only really important depending on how you want to find the term).

This will get you the slug structure you want. You can then use the page template you created to also find the second url parameter (or find the taxonomy that relates to the post) and add a tax_query to the WP Query to limit by taxonomy term. Or try it another way, once you have that parent/child page relationship and your slug structure complete...

I'm sure you can figure out the best way for you to code the required output.

Answer 2

1) Create a template called taxonomy-TAXONOMY_NAME.php)

2) add the following WP Query to the template

global $post;
$term = get_the_terms($post->id, 'TAXONOMY_NAME');
$args = array(
 'post_type' => 'POSTTYPE_NAME',
 'tax_query' => array(
  array(
   'taxonomy' => 'TAXONOMY_NAME',
   'field'    => 'slug',
   'terms'    => $term,
  ),
 ),
);
$query = new WP_Query( $args );

You will need to add the rest of the query stuff (like adding a title, excerpt etc) but that should (not tested) pull in all posts from the term which is defined for the page you are on.