You assign to context every loop iteration. So at the end, only the last
add_product_form constructed is ever used. Try this:
def show_cart(request):
cart_id = _cart_id(request)
cart_items = CartItem.objects.filter(cart_id=cart_id)
add_product_forms = {}
for item in cart_items:
q = item.quantity
print q #shows correct value (quantity) of each item in cart
add_product_form = ProductAddToCartForm(initial={'quantity': q})
add_product_forms[item.pk] = add_product_form
context = {'cart_items': cart_items, 'add_product_forms':
add_product_forms}
return render(request, 'cart_id/cart.html', context)
Note how I moved the context assignment OUTSIDE the for loop. Then adjust
your template to index into add_product_forms based on item.pk.
There are lots of other ways to do this too, I just thought this was the
quickest to show over email.
On Sat, May 14, 2016 at 8:42 PM, Chris Kavanagh <cka...@gmail.com> wrote:
>
> I'm working on an online shop, and I'm having a problem in the cart,
> here's a screen shot (http://pasteboard.co/Vwnv2T0.png).
> I'd like the form for each item (product) to show it's current quantity
> (that's already been added to the cart)
> as an initial value as most ecommerce sites do.
>
> I've tried iterating through the items in the cart (in views.show_cart)
> then adding the form,
> however the form for all items in the cart shows the exact same value (of
> the last item).
> In other words, there's 2 items in the cart, one has a quantity of 7 and
> the other a quantity of 3,
> but both forms show the quantity as 3.
>
> I can't figure out how to correct this, although I'm sure it's a simple
> fix.
> Thanks in advance for the help, and I hope this question is formatted
> correctly?
> Here's the code on github if it helps. . .
> https://github.com/chriskavanagh/ecommerce/tree/master/src
>
> # form
> PRODUCT_QUANTITY_CHOICES = [(i, str(i)) for i in range(1, 21)]
> class ProductAddToCartForm(forms.Form):
> quantity = forms.TypedChoiceField(choices=PRODUCT_QUANTITY_CHOICES,
> coerce=int)
> update =
> forms.BooleanField(required=False,initial=False,widget=forms.HiddenInput(attrs={'class':
> 'form-control'}))
>
>
> # views (cart_id.views.show_cart)
> def show_cart(request):
> cart_id = _cart_id(request)
> cart_items = CartItem.objects.filter(cart_id=cart_id)
> for item in cart_items:
> q = item.quantity
> print q #shows correct value (quantity) of each item in cart
> add_product_form = ProductAddToCartForm(initial={'quantity': q})
> context = {'cart_items': cart_items, 'add_product_form':
> add_product_form}
> return render(request, 'cart_id/cart.html', context)
>
>
> # template (cart.html)
> {% extends 'base.html' %}
> {% load staticfiles %}
>
> {% block title %}Shopping Cart{% endblock %}
>
> {% block content %} {% endblock %}
>
> {% block extra_content %}
> <div class="container">
> <div class="col-md-12">
>
> <h2>Cart</h2>
> <caption><b>Your Shopping Cart:</b> {{ cart_items_count }} Items
> In Your Cart.</caption>
> <hr>
>
> {% for item in cart_items %}
>
> <table class="table table-striped">
> <thead>
> <tr>
> <th>Product</th>
> <th>Unit Price</th>
> <th>Quantity</th>
> <th>Total Price</th>
> </tr>
> </thead>
> <tbody>
> <tr>
> <td><a href="{{ item.product.get_absolute_url
> }}">{{ item.product }}</a></td>
> <td>${{ item.product.price }}</td>
> <td>{{ item.quantity }}</td>
> <td>{{ item.total }}</td>
> <td>
> <div class="form-group">
> <form action="{% url 'cart:add'
> item.product.slug %}" method="POST">
> {% csrf_token %}
> <div class="col-xs-3">
> {{ add_product_form.quantity }}
> </div>
> {{ add_product_form.update
> }}
> <input class='btn btn-success btn-sm'
> type='submit' value='Update'/>
> </form>
> </div>
> </td>
> </tr>
> </tbody>
> </table>
>
> {% empty %}
> <h3>You Have Nothing In Your Cart.</h3>
> {% endfor %}
> </div>
> </div>
>
> {% endblock %}
>
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