I have created a custom post type called "al_product" and attached to it a custom taxonomy called "product_category".

In my archive-product_category.php I have this (relevant) code:

            if ( $termchildren  ) {
                // we have kids...just show the terms.
                foreach ( $termchildren as $child ) {
                    if ($i % 2 == 0) {
                        echo '<div class="tax-entry flex">';
                    } else {
                        echo '<div class="tax-entry flex" style="flex-direction: row-reverse;">';
                        <figure class="wp-block-media-text__media">
                            <?php if ( get_field('product_category_img', $child) ) echo wp_get_attachment_image( get_field('product_category_img', $child), 'full' ) ;?>
                        <div style="flex:60% 0 0;" class="wp-block-media-text__content">
                            <h2><?php echo $child->name ;?></h2>
                                if (get_field('short_description', $child )){ 
                                    echo get_field('short_description', $child );
                                    echo $child->description;
                            // Get (at most) 2 "product" posts in the child term.
                            $posts = get_posts( array(
                                'post_type'      => 'al_product',
                                'posts_per_page' => 2,
                                $taxonomy_name   => $child->slug,
                            ) );

                            // If there's exactly 1 post, use the post permalink.
                            if ( 1 === count( $posts ) ) : ?>
                                <a class="button" href="<?php the_permalink( $posts[0] ); ?>">See this Product</a>
                            <?php // Else, use the term link.
                            else : ?>
                                <a class="button" href="<?php echo esc_url( get_term_link( $child, $taxonomy_name ) ); ?>">See this Series</a>
                            <?php endif; ?>

                    </div> <!-- END FLEX -->
            } else { 
                // no kids...show the products
                echo '<div class="productCategories grid">';
                while ( have_posts() ) : the_post();

                    <div class="product_cat">
                        <a href="<?php the_permalink();?>">
                            <?php the_post_thumbnail('small');?>
                            <h2><?php the_title();?></h2>
                            $subtitle = get_field('subtitle');
                            if ( $subtitle ) { 
                            echo '<h3 class="entry-subtitle">'.$subtitle.'</h3>';
                        <?php //if (get_field('specs')['part_number']) echo '<span>'.get_field('specs')['part_number'].'</span>';?>

                echo '</div>';

The section I'm questioning is when there are no kids so we show products.

Currently this is returning the products correctly but sorting by title. I would like to sort by menu_order.

I added this to my functions.php:

add_action( 'pre_get_posts', 'rt_change_product_sort_order'); 
function rt_change_product_sort_order($query){
    if(get_query_var( 'product_category' )):
       //Set the order ASC or DESC
       $query->set( 'order', 'DESC' );
       //Set the orderby
       $query->set( 'orderby', 'menu_order' );

To no avail. I've also tried replacing the "If" statement with each of these:

if(is_post_type_archive( 'product_category' )):
if(get_query_var( 'product_category' )):
if(get_query_var( 'al_product' )):

What am I missing here?

  • If you want to target the taxonomy archive page, you should use is_tax(). If it's the post type archive page, then the post type would need to have the has_archive set to true, then use is_post_type_archive( 'al_product' ). Is archive enabled for your CPT?
    – Sally CJ
    Apr 8, 2021 at 4:24
  • 1
    Sally for the win! I needed my if statement to be if(is_tax( 'product_category' )): If you post as an answer. I'll check it! Thanks. @SallyCJ
    – rudtek
    Apr 8, 2021 at 4:29
  • Well, I have just revised my answer.. :)
    – Sally CJ
    Apr 9, 2021 at 6:16

1 Answer 1


In my archive-product_category.php I have this (relevant) code

Are you sure that's the correct name? Because for a post type archive, it should be archive-al_product.php and for a taxonomy archive page, it would be taxonomy-product_category.php.

Anyway, (as I said in the comments) if you want to target the taxonomy archive page, you should use is_tax(), or if it's the post type archive page, then you would use is_post_type_archive().

  • Note that the first (and only) parameter for is_post_type_archive() is one or more post type names/slugs like al_product in your case. So in your code/attempts, that is_post_type_archive( 'product_category' ) is actually not correct.. =)

  • Also, your post type should have the has_archive argument set to true or a slug like al-products. That way, when you visit the archive at example.com/?post_type=al_product or example.com/al-products, is_post_type_archive() would return true.

So to correctly sort the posts (in the main WordPress query), you can try the following:

// In the rt_change_product_sort_order() function:
// Instead of using get_query_var(), you would use is_tax().
if ( is_tax( 'product_category' ) ) :
    // ... your code.

// Or use is_post_type_archive() to target the CPT archive.
if ( is_post_type_archive( 'al_product' ) ) :
    // ... your code.

// Or combine the conditional tags, if you want to:
if ( is_tax( 'product_category' ) || is_post_type_archive( 'al_product' ) ) :
    // ... your code.

Additional Resources

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.