Django中的视图函数未被调用

Question

这是 view.py 文件。show_checkout 这个函数被调用，并且一直执行到 return HttpResponseRedirect('/receipt/') 这一行，但不知道为什么，receipt 这个视图没有被触发。所有的打印语句都没有工作：

from django.shortcuts import render_to_response
from django.template import RequestContext
from django.core import urlresolvers
from django.http import HttpResponseRedirect

from ecomstore.checkout.forms import CheckoutForm
from ecomstore.checkout.models import Order, OrderItem
from ecomstore.checkout import checkout
from ecomstore.cart import cart
from django.core.context_processors import csrf

# Create your views here.
def show_checkout(request, template_name='checkout/checkout.html'):
    c = {}
    c.update(csrf(request))
    if cart.is_empty(request):
        cart_url = urlresolvers.reverse('show_cart')
        return HttpResponseRedirect(cart_url)
    if request.method == 'POST':
        postdata = request.POST.copy()
        form = CheckoutForm(postdata)
        if form.is_valid():
            response = checkout.process(request)
            order_number = response.get('order_number',0)
            print 'this is the order number: ' + str(order_number)
            error_message = response.get('message','')
            if order_number:
                request.session['order_number'] = order_number
#                receipt_url = urlresolvers.reverse('checkout_receipt')
                print request.session['order_number']
                return HttpResponseRedirect('/receipt/')

        else:
            error_message = 'Correct the errors below'
    else:
        form = CheckoutForm()
    page_title = 'Checkout'
    return render_to_response(template_name, locals(), context_instance= RequestContext(request))

##Currently this doesn't seem to be running
def receipt(request, template_name='checkout/receipt.html'):
    order_number = request.session.get('order_number','')
    print 'this is receipt order number: ' + str(order_number)
    if order_number:
        print 'in order_number'
        order = Order.objects.filter(id=order_number)[0]
        order_items = OrderItem.objects.filter(order=order)
        del request.session['order_number']
    else:
        print 'not in order number'
        cart_url = urlresolvers.reverse('show_cart')
        return HttpResponseRedirect(cart_url) 
    return render_to_response(template_name, locals(), context_instance=RequestContext(request))

这是 checkout.urls：

from django.conf.urls.defaults import *
from ecomstore import settings

urlpatterns = patterns('ecomstore.checkout.views',
                       (r'^$','show_checkout',{'template_name':'checkout/checkout.html','SSL':settings.ENABLE_SSL},'checkout'),
                       (r'^receipt/$','receipt',{'template_name':'checkout/receipt.html','SSL':settings.ENABLE_SSL},'checkout_receipt'),
)

还有 urls.py：

urlpatterns = patterns('',

                       # Examples:
    # url(r'^$', 'ecomstore.views.home', name='home'),
    # url(r'^ecomstore/', include('ecomstore.foo.urls')),

    # Uncomment the admin/doc line below to enable admin documentation:
    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # Uncomment the next line to enable the admin:
                       url(r'^admin/', include(admin.site.urls)),
                       (r'^', include('catalog.urls')),
                       (r'^cart/$', include('cart.urls')),
                       (r'^checkout/$', include('checkout.urls')),
                       (r'^receipt/$', include('checkout.urls')),

)

重要提示：现在它被转发到了 localhost/cart

django 调试视图函数路由配置 urls

Django中的视图函数未被调用

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