python - 带可选参数的 Django HTTPResponseRedirect & Reverse

Question

如何将 Django 的 Reverse 与信息的可选参数一起使用？我不断得到

views.py:

def cartForm(request, prod):
    if request.method=="POST":
        quantity = request.POST.get('quantity', False)
        if quantity:
            add_to_cart(request, prod, quantity)
            return HttpResponseRedirect(reverse("cart"))
        #if no quantity indicated, display error message
        return HttpResponseRedirect(reverse('products.views.info', kwargs={'prod': prod, 'error':True}))

def info(request, prod, error=False):
    prod = Product.objects.get(id=prod)
    return render(request, "products/info.html", dict(product = prod, error=error))

urls.py:

url(r'^(?P<prod>\d+)/', "products.views.info", name='info'),

我不断收到以下错误:

Reverse for 'products.views.info' with arguments '()' and keyword arguments '{'prod': u'2', 'error': True}' not found. 1 pattern(s) tried: ['products/(?P<prod>\\d+)/']

Answer 1

您可以将可选的 GET 参数传递为:

reverse('products.views.info', kwargs={'prod': prod})+'?error=true&some_other_var=abc'

reverse 将解析后的 URL 作为字符串返回，因此您可以连接任意数量的 GET 参数。