无法使用shopify_python_api启动webhook

Question

我正在使用https://github.com/Shopify/shopify_django_app中的示例应用程序并尝试找到创建webhook的最佳位置。下面是示例代码中的finalize方法，我试图在创建会话后创建webhook。

def finalize(request):
    shop_url = request.REQUEST.get('shop')
    try:
        shopify_session = shopify.Session(shop_url)
        request.session['shopify'] = {
            "shop_url": shop_url,
            "access_token": shopify_session.request_token(request.REQUEST)
    }
        #create the webhooks
        shopify.ShopifyResource.activate_session(shopify_session)

        product_hook = shopify.Webhook()
        product_hook.topic ='products/create'
        product_hook.address = settings.SHOPIFY_APP_URL + '/notify/product/'
        product_hook.format = 'json'
        product_hook.save()

    except Exception, err:
        log.error(str(err))
        messages.error(request, "Could not log in to Shopify store.")
        return redirect(reverse('shopify_app.views.login'))

    messages.info(request, "Logged in to shopify store.")

    response = redirect(_return_address(request))
    request.session.pop('return_to', None)
    return response

我没有在日志中获得任何内容，因此它似乎已经过了webhook创建。但是，没有创建webhook，然后我收到Django错误：

NoReverseMatch at /finalize/

Reverse for 'root_path' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: []

对我所犯错误的任何见解将不胜感激。

以下是示例应用中的views.py：

from django.shortcuts import render_to_response, redirect
from django.contrib import messages
from django.core.urlresolvers import reverse
from django.template import RequestContext
from django.conf import settings
import shopify

def _return_address(request):
    return request.session.get('return_to') or reverse('root_path')

def login(request):
    # Ask user for their ${shop}.myshopify.com address

    # If the ${shop}.myshopify.com address is already provided in the URL,
    # just skip to authenticate
    if request.REQUEST.get('shop'):
        return authenticate(request)
    return render_to_response('shopify_app/login.html', {},
                              context_instance=RequestContext(request))

def authenticate(request):
    shop = request.REQUEST.get('shop')
    if shop:
        scope = settings.SHOPIFY_API_SCOPE
        redirect_uri = request.build_absolute_uri(reverse('shopify_app.views.finalize'))
        permission_url = shopify.Session(shop.strip()).create_permission_url(scope, redirect_uri)
        return redirect(permission_url)

    return redirect(_return_address(request))

def finalize(request):
    shop_url = request.REQUEST.get('shop')
    try:
        shopify_session = shopify.Session(shop_url)
        request.session['shopify'] = {
            "shop_url": shop_url,
            "access_token": shopify_session.request_token(request.REQUEST)
        }

    except Exception:
        messages.error(request, "Could not log in to Shopify store.")
        return redirect(reverse('shopify_app.views.login'))

    messages.info(request, "Logged in to shopify store.")

    response = redirect(_return_address(request))
    request.session.pop('return_to', None)
    return response

def logout(request):
    request.session.pop('shopify', None)
    messages.info(request, "Successfully logged out.")

    return redirect(reverse('shopify_app.views.login'))

添加urls.py

from django.conf.urls import patterns, include, url
from django.contrib import admin

urlpatterns = patterns('',
    url(r'^$', 'shopify_app.views.login'),

    url(r'^admin/', include(admin.site.urls)),

    url(r'^login/', 'shopify_app.views.login'),
    url(r'^authenticate/$', 'shopify_app.views.authenticate'),
    url(r'^finalize/$', 'shopify_app.views.finalize'),
    url(r'^logout/$', 'shopify_app.views.logout'),
)