WooCommerce get products based on specific taxonomy - php

Question

I need to modify the WooCommerce product query because I want to filter the shown products on the shop pages based on product tag custom taxonomy.
So what I've tried is this here but it don't works:
add_filter( 'woocommerce_product_query_meta_query', 'filter', 10, 2 );
function filter( $meta_query, $query ) {
// Only on category pages
if ( ! is_product_category() ) {
return $meta_query;
}
$meta_query[] = array(
'key' => 'taxonomy',
'value' => 'product_tag',
'compare' => 'EXIST'
);
return $meta_query;
}
So I just want to display all products which have the taxonomy ABCSD in it.
The code is placed in my functions.php. What I'm doing wrong here?
Notice:
I mean the values I get when I call this function:
wp_get_post_terms( $product_id, 'product_tag' );

Answer 1

As it is about a taxonomy, you need to use a tax query and then the hook will be different. Also you can make it for specific product tags:
add_filter( 'woocommerce_product_query_tax_query', 'filter_products_with_specific_product_tags', 10, 2 );
function filter_products_with_specific_product_tags( $tax_query, $query ) {
// Only on category pages
if ( ! is_product_category() )
return $tax_query;
$tax_query[] = array(
'taxonomy' => 'product_tag',
'field' => 'name',
'terms' => array('Green', 'Yellow', 'Red'), // Defined product tags term names
);
return $tax_query;
};
Code goes in function.php file of your active child theme (or active theme). It should works.