Custom Slug for a custom post type and default post

Question

It's now several hours that I am trying to get this done without finding a proper solution.

WHAT I WANT TO ACHIEVE

I'd like WP to use the following URL structure:

1) Posts -> /%category%/articles/%postname%/
2) CPT   -> /%category%/CPT/%postname%/

Where the %category% bit is the default categories taxonomy used in the Posts

WHAT I DID SO FAR

To add the default categories taxonomy to the CPT, this bit has been added while registering the CPT

'taxonomies'         => array('category'),

whereas the followings are the rewrite args

$rewrite_args = array( 'slug' => '%category%/test', 'with_front' => false, 'feeds' => false, 'pages' => false );

CHANGING THE DEFAULT POST

I know the most obvious solution is to change the permalink structure in the setting panel. And this need to be done in any case otherwise anything I will describe will work.

So my Permalink structure has been set as

/%category%/articles/%postname%/

WHAT'S HAPPENING

If I leave the basic configuration, no hooks, anything. Posts works as expected.

At the time I hook on the post_type_link to make my CPT replacing the %category%, the default configuration stops working.

I tried to re-register the Posts type; this seems to give better results (though there is the inconvenience to see the "posts" item twice in the admin bar), but for some reason when I do this, the CPT custom slug stops working.

Do you have any specific hint? Thanks Andrea

Answer 1

You'll have to add your own rewrite rules to make this work, no way around that.

First, don't use the %category% rewrite tag, register your own tag and use that for the CPT categories:

function wpd_query_vars( $qvars ) {
    $qvars[] = 'cptcat';
    return $qvars;
}
add_filter( 'query_vars', 'wpd_query_vars' );

You can then swap that tag for the category in post_type_link. Note that this only handles one level of term. If you want to do parent/child term permalinks, you'll have to modify this function and add a rewrite rule to catch every level of term hierarchy.

function wpd_test_post_link( $post_link, $id = 0 ){
    $post = get_post($id);  
    if ( is_object( $post ) && $post->post_type == 'your_cpt' ){
        $terms = wp_get_object_terms( $post->ID, 'category' );
        if( $terms ){
            foreach( $terms as $term ){
                if( 0 == $term->parent ){
                    return str_replace ( '%cptcat%' , $term->slug , $post_link );
                }
            }
        } else {
            return str_replace ( '%cptcat%' , 'uncategorized', $post_link );
        }
    }
    return $post_link;
}
add_filter( 'post_type_link', 'wpd_test_post_link', 1, 2 );

Now this still won't work because WordPress thinks your permalink is a parent/child category request. Add a rewrite rule to override that:

function wpd_test_rewrites(){
    add_rewrite_rule(
        '([^/]+)/CPT/([^/]+)/?$',
        'index.php?your_cpt=$matches[2]',
        'top'
    );
}
add_action( 'init', 'wpd_test_rewrites' );

Answer 2

/%category%/ isn't a variable that Wordpress can process or replace when you setup a slug for a Customer Post Type.

If you want a category system to run inside the Custom Post Type as like is available for the normal post type, ensure you have these enabled:

capability_type' => 'post', 'has_archive' => true, 'hierarchical' => true,

Hopefully this will help.

Answer 3

I think that you are looking to use the add_permastruct function. I haven't done a lot with it, but from my understanding this is what you are looking to do:

(Adapted from a TutsPlus tutorial)

// Please note that this will only work on WordPress 3.4+ http://core.trac.wordpress.org/ticket/19871
add_rewrite_tag('%yourcpt_cpt%','(yourcptname)s','post_type=');
add_permastruct('cpt_category_archive', '%category%/%yourcpt_cpt%/%postname%');

Your declaration for the CPT looks fine, but 'slug' => '%category%/test' should just be 'slug' => 'test'

This is untested, so you should try it on a non-production server. You should likely flush rewrite rules after making the code live (perhaps with flush_rewrite_rules()).

This is some advanced futzing around with WP Rewrite, more info at the codex entry for WP Rewrite and add_permastruct as well as in the code.