I'm working on a store created with Drupal Commerce where I have first created a product variation, then I created a corresponding product display type and finally I created different products, e.g. mattresses.
Now I find myself stuck with this problem: I have mattresses of different size and I have a product attribute (within the product variation) accounting for the different sizes - I have the option "Enable this field to function as an attribute field on Add to Cart forms" already checked.
When I select a size from the select list, the product price changes and displays accordingly but other product attributes, i.e. the sku, displaying on the same page, does not update.
Now, if I move on to the cart summary I can find the right sku, it looks like the price updates without the need for a page reload, while other custom attribute fields don't (you can see all of this live at http://www.dormiplus.it/cms/?q=it/materassi/stella, where "codice" is equivalent to sku).
How can I have the right sku displaying correctly whenever I select a different mattress size?