related products categories

Hey fabio,

Thank you for the inquiry.

Related products are generated by WooCommerce, and there is no default option to change which items are shown in the grid. You can try the following filter in the functions.php file to change the related products query but this will affect the site globally.

add_filter( 'woocommerce_related_products', 'avf_custom_related_products_by_category', 10, 3 );

function avf_custom_related_products_by_category( $related_posts, $product_id, $args ) {
    $category_id = 123; // Replace 123 with your desired category ID

    $related_products = get_posts( array(
        'posts_per_page' => $args['posts_per_page'],
        'post_type'      => 'product',
        'fields'         => 'ids',
        'tax_query'      => array(
            array(
                'taxonomy' => 'product_cat',
                'field'    => 'term_id',
                'terms'    => $category_id,
            ),
        ),
    ) );

    return $related_products;
}

Make sure to replace $category_id with the ID of the category that you would like to display.

Best regards,
Ismael

Hi,

Thank you for the update.

You can apply a custom field called av_related_category_id to the product and use the ID of the category you’d like to display as its value. We also updated the filter to accommodate these changes.

add_filter( 'woocommerce_related_products', 'avf_custom_related_products_by_custom_field', 10, 3 );

function avf_custom_related_products_by_custom_field( $related_posts, $product_id, $args ) {
    $category_id = get_post_meta( $product_id, 'av_related_category_id', true );

    if ( ! $category_id ) {
        return $related_posts;
    }

    $related_products = get_posts( array(
        'posts_per_page' => $args['posts_per_page'],
        'post_type'      => 'product',
        'fields'         => 'ids',
        'tax_query'      => array(
            array(
                'taxonomy' => 'product_cat',
                'field'    => 'term_id',
                'terms'    => $category_id,
            ),
        ),
    ) );

    return $related_products;
}

Best regards,
Ismael