Input field in always receives value of last item in list

Question

I have a displaying a product catalog in Proudcts.xhtml:

Answer 1

Each line of your h:datatable references the same variable ViewProductsManagedBean.quantityPurchased. If the form is submitted, the value of ViewProductsManagedBean.quantityPurchased will be set for each line again and again. That's why the value of the last row defines the final state of quantityPurchased and this is the value you get in your method.