Importance of Ajax add to cart button with custom fields on single product page

Question

I'm trying to edit the "Add to Cart" button for a single product page. Successfully added a custom ajax call using LoicTheAztec's solution.

The code runs just fine. However, I need to change $product_id in the solution's code to the product's custom field value, which is "custom_id".

Try to parse through the $custom_data variable, similar to:

$cart_item_key = WC()->cart->add_to_cart( $custom_data['custom_id'], $quantity, $variation_id, $variation, $cart_item_data );< ;/p>

Also tried using another function call:

function single_product_text_field() {
    global $product;

   // $cus_id = get_post_meta( $product->get_id(), 'custom_id', true );
      $cus_id = $product->get_meta( 'custom_id' );
    
    if ( ! empty($cus_id) )
        return $cus_id;
}

Unfortunately, I was unsuccessful. No ajax request is made on button click. If I replace $product_id with a static custom field value, it works fine.

Unfortunately, I have no more ideas. If you have any ideas I would at least be grateful!

Answer 1

In my case the global $post page was already declared. so

$cus_id = get_post_field('custom_id', $product_id);

solved the problem!