Related Products only by Tags, Not by Categories in WooCommerce 3

Question

I try to get the opposite of: Related Products only by categories, not by tags in WooCommerce 3

I would like to show related products based only on product Tags, and Not by categories.

So far I have this in my function.php under my child theme:

add_filter( 'woocommerce_get_related_product_cat_terms', function( $term_ids, $product_id ){
    return array();
}, 10, 2 );

But it doesn't work.

Any help is greatly appreciated.

Answer 1

In woocommerce version 3.2.x, I have tested first this code to only show related products based on product tags only:

add_filter( 'woocommerce_product_related_posts_relate_by_category', '__return_false' );

For product tags you will use:

add_filter( 'woocommerce_product_related_posts_relate_by_tag', '__return_false' );

Code goes in functions.php file of your active child theme (or active theme). It works perfectly.

Important: To see changes, clear transients by going in WooCommerce > Status > tools and in "WooCommerce transients" click on "Clear transients" button.

Your code works too, so there is something that is making trouble. It can be a plugin, your theme or some other code made by you.