我正在尝试将 django 应用程序与 paypal 支付网关集成，但我没有收到信号，而且我无法接收 paypal ipn 通知，

模型.py

class Pr_request(models.Model): 
    number = models.CharField(max_length=20) 
    subject = models.TextField(max_length=500) 
    date_posted = models.DateTimeField(auto_now_add=True) 
 
class Purchase(models.Model): 
    resourse = models.ForeignKey(Pr_request, related_name='purchase') 
    purchaser = models.ForeignKey(User) 
    purchased_at = models.DateTimeField(auto_now_add=True) 

views.py ti 创建 payment_dic

def payment_proccess(request, id): 
    pr = get_object_or_404(Pr_request, id=id) 
    host = request.get_host() 
 
    paypal_dict = { 
 
    'business': settings.PAYPAL_RECEIVER_EMAIL, 
    'amount': '%.2f' % pr.fees.quantize(Decimal('.01')), 
    'item_name': 'purchase Req {}'.format(pr.number), 
    'invoice': '2', 
    'currency_code': 'USD', 
    'notifiy_url'  : 'http://da...879.ngrok.io',#also i tried  
     localhost 
    'return_url'   : 'http://{}{}'.format(host, reverse('payment:done')), 
    'cancel_return': 'http://{}{}'.format(host, reverse('payment:canceled')), 
    } 
 
    form = PayPalPaymentsForm(initial=paypal_dict) 
    print (" iam pyament process function") 
    return render(request, 'payment/process.html', {'pr':pr, 'form':form}) 

信号.py

def payment_notification(request, sender, **kwargs): 
    ipn_obj = sender 
    if ipn_obj.payment_status == ST_PP_COMPLETED: 
        print ("successful payment was done Lol") 
        pr = get_object_or_404(Pr_request, id=ipn_obj.invoice) 
        pur = Purchase.objects.get_or_create(resourse=pr, 
                                            purchaser=request.user, 
                                            tx='some text') 
        pur.save() 
        #mark the pr as paid 
    else: 
        print (" not able to pay") 
        # payment was successful 
 
valid_ipn_received.connect(payment_notification) 
print ("signal is fired") 

初始化.py

default_app_config = 'payment.apps.PaymentConfig' 

请注意，每当我重新加载本地服务器时，都会触发我的信号， 所以关于我的错误的任何想法，谢谢..

请您参考如下方法:

最后我发现了我的错误，这只是我的 views.py 中的错字

View .py

'notifiy_url'  : 'http://{}{}'.format(host, reverse('paypal-ipn')), 
# should be changed to 
'notify_url'  : 'http://{}{}'.format(host, reverse('paypal-ipn')), 
# also here i have set the logged in user 
'payer': request.user,