I understand what you say, however I know only call methods using {% url
'app.view.func'%} or {%}% app.view.func.
As I understand this django-aap carton, the shopping cart in the session
live. If it is in session I would have
access their methods and attributes. Well that's exactly what I'm not
getting. Access method remove_single.
In this href = "" is an image that removes the items you want to call the
method remove_simgle.
Actually I'm wrong in doing {% url%} because I do not want move pages. I
just want to remove the item from the cart.
class Cart(object):
"""
A cart that lives in the session.
"""
#...
#...
def remove_single(self, product):
"""
Removes a single product by decreasing the quantity.
"""
if product not in self.products:
return
if self._items_dict[product.pk].quantity <= 1:
# There's only 1 product left so we drop it
del self._items_dict[product.pk]
else:
self._items_dict[product.pk].quantity -= 1
self.session.modified = True
Ricardo
2013/10/11 Daniel Roseman <[email protected]>
> On Thursday, 10 October 2013 20:29:32 UTC+1, ke1g wrote:
>
>> No. You can't pass an argument to a model method from the template. I
>> see two options for you:
>>
>> 1. Rework the method so that the argument is optional, and if the
>> argument is not provided, the method uses a reasonable default (maybe
>> item.product?).
>> 2. Write a custom template filter that lets you supply an argument
>>
>
> These answers all miss the point. The main problem is not that you need to
> pass an argument, it's that what you're trying to do makes *no sense at
> all* in the context of a template.
>
> You can't make the href of a link just point to a model method. A link
> needs to be a URL. So it needs a view, and an entry in the urlconf pointing
> to that view. That urlconf entry, of course, can take an argument, but that
> argument can't be a "product", it needs to be some kind of ID or slug that
> can be represented in the URL.
>
> Once you've got the view and the URL, you can use the `{% url %}` tag to
> generate the value for your link:
>
> <a href="{% url "remove_single" item.id %}">
>
> (although note that an action that removes an item should be a POST, not a
> simple GET link).
> --
> DR.
>
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