Display Products Associated with Specific Attribute

Question

I'm currently building a glossary page listing a specific product attribute, and would like to link to each of the products associated with each term for that attribute.

I believe I should be using wc_get_products with a custom filter, but can only get it to display all products, regardless of associated attribute terms.

Following is the custom filter I have in place:

function my_handle_custom_query_var( $query, $query_vars ) {
    if ( !empty( $query_vars['pa_ingredients'] ) ) {
        $query[ 'tax_query' ][] = array(
            'taxonomy' => 'pa_ingredients',
            'field'    => 'slug',
            'terms'    => $query_vars['pa_ingredients'],
            'operator' => 'IN',
        );
    }
    return $query;
}
add_filter( 'woocommerce_product_data_store_cpt_get_products_query', 'my_handle_custom_query_var', 10, 2 );

And following is the code I'm using to display the associated products:

$taxonomy = 'pa_ingredients';
$terms = get_terms( $taxonomy );
foreach ( $terms as $term ) {
    $products = wc_get_products( array( 'ingredients' => $term->slug ) );
    foreach ( $products as $product ) {
        $product_id = wc_get_product_id_by_sku( $product->sku );
        $link = get_permalink( $product_id );
        echo '<a href="' . $link . '">' . $product->name . '</a>';
    }
}

Any ideas what I'm doing wrong?

Answer 1

Error in wc_get_products caught by @SallyCJ fixed my problem.

Where I had ingredients, I needed pa_ingredients.

Working code is as follows:

$taxonomy = 'pa_ingredients';
$terms = get_terms( $taxonomy );
foreach ( $terms as $term ) {
    $products = wc_get_products( array( 'pa_ingredients' => $term->slug ) );
    foreach ( $products as $product ) {
        $product_id = wc_get_product_id_by_sku( $product->sku );
        $link = get_permalink( $product_id );
        echo '<a href="' . $link . '">' . $product->name . '</a>';
    }
}

Thanks!