updating the cart fails

[Simo]

Hello,

I am trying to get the cart work, but I am stuck with the following problem.

When I modify the quantity of an item in the cart, the cart_update view returns the cart as it is, without changes.

Here's the form to change the quantity (inside my custom cart template):

        <!-- form to submit a quantity change -->

        <form class="qtyform" id="qtyform-{{cartitem.id}}" action="{% url cart_update %}" method="post">{% csrf_token %}

          <div class="large-12 columns">

            <input type="text" name="update_item_{{cartitem.id}}" value="{{cartitem.quantity}}" />

            <div class="update-btn">

              <a href="#" onclick="$('#qtyform-{{cartitem.id}}').submit();">

              <img src="{{STATIC_URL}}images/update.png" alt="{% trans 'update' %}" />

              <small>[{% trans 'update' %}]</small></a>

            </div>

          </div>

        </form>

When I submit the form, the view is called with a self.request.POST = <QueryDict: {u'csrfmiddlewaretoken': [u'd3vneua1mEFp2HJ7MGHtLoIKKFzq49sV'], u'update_item_1': [u'10']}>

Then the view fills a form_set with the line

formset = get_cart_item_formset(cart_items=context['cart_items'],

                    data=self.request.POST)

but it gets an error when, in the shop/forms.py-->get_cart_item_formset it tries to fill in the formset with the line:

form_set = CartItemFormSet(data, **kwargs)

The form does not make any use of the POST variable "item_update_ID=QTY".

I do not see where the code uses the information "item_update_ID=QTY, as suggested in the docs and in the views/cart.py-->CartDetails view.

Thank you very much,

Simone