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Rewrite slug for Custom Post Type? (1 post)

  1. wzshop
    Member
    Posted 2 years ago #

    Hello,
    I have registered a custom post type called "books", which supports categories and tags. In order to show the category in the permalink a rewrite array is created in my CPT: rewrite' => array('slug' => 'books/%category%.

    Now, in order to get the correct category, the following rewrite code is written in my functions.php:

    //Get category
    add_filter('post_type_link', 'custom_permalink_structure', 10, 4);
    function custom_permalink_structure($post_link, $post, $leavename, $sample) {
        if ( false !== strpos( $post_link, '%category%' ) ) {
            $glossary_letter = get_the_terms( $post->ID, 'category' );
    
            // adding check and reset
            if ( !$glossary_letter ) { $glossary_letter = array(); }
            // continue as you were
    
            $post_link = str_replace( '%category%', array_pop( $glossary_letter )->slug, $post_link );
        }
    return $post_link;
    }
    //**End

    This all works correct, but three things go not as desired:
    1: When i post a cpt only in a subcategory, i.e. genre/adventure, then the URL is generated as follows: domain.com/books/adventure/post-name. However the default WP structure would generate an URL as follows (which is desired): domain.com/books/genre/adventure/post-name.

    2: When i post a CPT in a subcategory and in the concerning parent category, i.e. parent category "genre" and subcategory "adventure", the URL is generated as follows: domain.com/books/adventure/post-name. Whereas the default WP structure (which is desired) would generate an URL as follows: domain.com/books/genre/post-name

    3: When i go to the archive page of a CPT, the URL looks as follows: domain.com/books/%category%. This is of course logical, since the slug is built that way. However, is there a way to filter the %category% tag when no %category% is defined?

    I hope that someone can help me out with this. Help is greatly appreciated!!
    Thanks, Robbert

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