Pagination throws 404 error on custom taxonomy archive pages

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I have created a custom taxonomy for a custom post type called “portfolio” like so: 

function jvs_portfolio_categories_init() {
    register_taxonomy(
        'project-category',
        'portfolio',
        array(
      'label'        => __( 'Project Categories' ),
      'query_var'    => true,
      'hierarchical' => true
        )
    );
}
add_action( 'init', 'jvs_portfolio_categories_init' );

Then I added an archives.php page so I could show posts in those taxnomies, the problem is that pagination breaks on the second page, this is basically my loop in the archives page:

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<?php $paged = (get_query_var('page')) ? get_query_var('page') : 1; ?>
<?php global $query_string; query_posts($query_string . '&post_type=portfolio&paged=' . $paged); ?>
<?php if (have_posts()) while (have_posts()) : the_post(); ?>
     // Stuff here
<?php endwhile; ?>

It just shows me a 404 page error when I try to go to the 2nd page, I’m using pretty permalinks but if I manually replace the /page/2 param in the url with ?page=2 it works fine even though the pagination works fine everywhere else in the site.

Can you guys help me? Thanks in advance!

Post Views: 5

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1 comment

  1. This function fixed the issue:

    function change_posttype() {
  if( is_archive() && !is_admin() ) {
    set_query_var( 'post_type', array( 'post', 'portfolio' ) );
  }
}
add_action( 'parse_query', 'change_posttype' );

    Then I just removed the paged and query_string function in my code and just left the regular loop 🙂