Taxonomy rewrite pagination 404

Question

I have rewritten my taxonomy url to the name of my posts type 'filter'.

Because I have done this, my pagination does not work anymore on the url:

http://www.website.com/filter/term-name/

So if I visit

http://www.website.com/filter/term-name/page/2

I get a 404

I think this is because Wordpress sees filter now as the post type and the taxonomy.

If I change 'slug' => 'filter', to for example 'slug' => 'test' it works fine. Does anyone know how I can say to Wordpress that 'filter' is in this case the taxonomy.

$args = array(
            'labels'                     => $labels,
            'hierarchical'               => true,
            'public'                     => true,
            'show_ui'                    => true,
            'show_admin_column'          => true,
            'show_in_nav_menus'          => true,
            'show_tagcloud'              => true,
            'rewrite'                    => array( 'slug' => 'filter', 'with_front' => false ),
        );
        register_taxonomy( 'service', 'filter', $args );

Any suggestion to why this is not working?

Answer 1

While looking for a solution I got this post: Taxonomies with same slug as CPT

So basically you need to add custom rewrite rules, I haven't tested the solution but I guess it will work out for you.

/* Register CPT
*/
function wpse_138987_post_type_filter() {
 register_post_type('filter', array(
    'labels' => array(
        'name' => 'Filter',
        'all_items' => 'All Posts'
    ),
    'public' => true
 ));
}
add_action('init', 'wpse_138987_post_type_filter');

// register taxonomy
function wpse_138987_taxonomy_service() {
 register_taxonomy('service', array('filter'), array(
    'labels' => array(
        'name' => 'Service'
    ),
    'hierarchical'               => true,
    'public'                     => true,
    'show_ui'                    => true,
    'show_admin_column'          => true,
    'show_in_nav_menus'          => true,
    'show_tagcloud'              => true,
    'rewrite' => array('slug' => 'filter')
));
}
add_action('init', 'wpse_138987_taxonomy_service');


/*
 * Replace Taxonomy slug with Post Type slug in url
*/
function taxonomy_slug_rewrite($wp_rewrite) {
  $rules = array();
  // get all custom taxonomies
  $taxonomies = get_taxonomies(array('_builtin' => false), 'objects');
  // get all custom post types
  $post_types = get_post_types(array('public' => true, '_builtin' => false), 'objects');

  foreach ($post_types as $post_type) {
    foreach ($taxonomies as $taxonomy) {

        // go through all post types which this taxonomy is assigned to
        foreach ($taxonomy->object_type as $object_type) {

            // check if taxonomy is registered for this custom type
            if ($object_type == $post_type->rewrite['slug']) {

                // get category objects
                $terms = get_categories(array('type' => $object_type, 'taxonomy' => $taxonomy->name, 'hide_empty' => 0));

                // make rules
                foreach ($terms as $term) {
                    $rules[$object_type . '/' . $term->slug . '/?$'] = 'index.php?' . $term->taxonomy . '=' . $term->slug;
                }
            }
        }
    }
}
// merge with global rules
$wp_rewrite->rules = $rules + $wp_rewrite->rules;
}
add_filter('generate_rewrite_rules', 'taxonomy_slug_rewrite');

The above solution works only if you are using Permalinks with Post name.

Make sure you save permalink after adding the code, to flush rewrite rules.

Also you need to add files for Custom Post Type Archive and Taxonomy:

 archive-filter.php
 single-filter.php
 taxonomy-service.php

Go to settings/permalinks and save changes using structure /%postname%/.

Answer 2

I know this question is quite old but there are many people still looking for this answer as I was earlier today. The code below is assuming that you have both your Custom Post Type and Taxonomy sharing the same slug. In this example the post type is portfolio and the taxonomy is services

function generate_taxonomy_rewrite_rules( $wp_rewrite ) {
  $rules = array();
  $post_types = get_post_types( array( 'name' => 'portfolio', 'public' => true, '_builtin' => false ), 'objects' );
  $taxonomies = get_taxonomies( array( 'name' => 'services', 'public' => true, '_builtin' => false ), 'objects' );
  foreach ( $post_types as $post_type ) {
    $post_type_name = $post_type->name; // 'developer'
    $post_type_slug = $post_type->rewrite['slug']; // 'developers'
    foreach ( $taxonomies as $taxonomy ) {
      if ( $taxonomy->object_type[0] == $post_type_name ) {
        $terms = get_categories( array( 'type' => $post_type_name, 'taxonomy' => $taxonomy->name, 'hide_empty' => 0 ) );
        foreach ( $terms as $term ) {
          $rules[$post_type_slug . '/' . $term->slug . '/?$'] = 'index.php?' . $term->taxonomy . '=' . $term->slug;
          $rules[$post_type_slug . '/' . $term->slug . '/page/?([0-9]{1,})/?$'] = 'index.php?' . $term->taxonomy . '=' . $term->slug . '&paged=' . $wp_rewrite->preg_index( 1 );
        }
      }
    }
  }
  $wp_rewrite->rules = $rules + $wp_rewrite->rules;
}
add_action('generate_rewrite_rules', 'generate_taxonomy_rewrite_rules');

Answer 3

I have the same problem but finally i resolved with below code added into functions.php of theme folder.

function generate_taxonomy_rewrite_rules( $wp_rewrite ) {

$rules = array();

$post_types = get_post_types( array('public' => true, '_builtin' => false ), 'objects' );
$taxonomies = get_taxonomies( array('public' => true, '_builtin' => false ), 'objects' );

foreach ( $post_types as $post_type ) {
    $post_type_name = $post_type->name;
    $post_type_slug = $post_type->rewrite['slug'];

    foreach ( $taxonomies as $taxonomy ) {//echo 'DDDDD'; print_r($taxonomy);
        if ( $taxonomy->object_type[0] == $post_type_name ) {
            $terms = get_categories( array( 'type' => $post_type_name, 'taxonomy' => $taxonomy->name, 'hide_empty' => 0 ) );
            //print_r($terms); 
            foreach ( $terms as $term ) {
                $rules[ $taxonomy->name.'/'. $term->slug . '/?$'] = 'index.php?' . $term->taxonomy . '=' . $term->slug;
                $rules[ $taxonomy->name.'/'. $term->slug . '/page/?([0-9]{1,})/?$'] = 'index.php?'.'type='.$post_type_name."&" . $term->taxonomy . '=' . $term->slug . '&paged=' . $wp_rewrite->preg_index( 1 );

            }
        }
    } 
}

$wp_rewrite->rules = $rules + $wp_rewrite->rules;

}

add_action('generate_rewrite_rules', 'generate_taxonomy_rewrite_rules');

REMEMBER MY $taxonomy->name and post type is similar. hope it will work.