我很难弄清楚这一点，我不断收到错误消息：
show_item() takes exactly 2 arguments (1 given)
以下是我的看法：
def show_item(request,item_slug):
i = get_object_or_404(Item, slug=item_slug)
categories = Category.objects.all().prefetch_related('item')
# need to evaluate the HTTP method
if request.method == 'POST':
# add to order..create the bound form
postdata = request.POST.copy()
form = ItemAddToCartForm(request,postdata)
# check validation of posted data
if form.is_valid():
# add to order and redirect to order page
order.add_to_order(request)
# if test cookie worked, get rid of it
if request.session.test_cookie_worked():
request.session.delete_test_cookie()
url =urlresolvers.reverse('show_order')
# redirect to order page
return HttpResponseRedirect(url)
else:
# it's a GET, create the unbound from. Note request as a Kwarg
form = ItemAddToCartForm(request=request,label_suffix=':')
# assign the hidden input the item slug
form.fields['item_slug'].widget.attrs['value'] = item_slug
# set the test cookie on our first GET request
request.session.set_test_cookie()
context = {
'categories':categories,
'form':form,
}
return render_to_response("menu.html",context,context_instance=RequestContext(request))
这是我的这个视图的网址：
url(r'^menu/$','live.views.show_item'),
我环顾四周，但都是徒劳的，提前谢谢你。