+ fixes latest issue.

standard/ipn/models.py

@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 import urllib2
 from paypal.standard.models import PayPalStandardBase
+from paypal.standard.ipn.signals import *
 
 
 class PayPalIPN(PayPalStandardBase):
@@ -18,4 +19,23 @@ def _postback(self):
 
     def _verify_postback(self):
         if self.response != "VERIFIED":
-            self.set_flag("Invalid postback. (%s)" % self.response)
+            self.set_flag("Invalid postback. (%s)" % self.response)
+
+    def send_signals(self):
+        """Shout for the world to hear whether a txn was successful."""
+        # Transaction signals:
+        if self.is_transaction():
+            if self.flag:
+                payment_was_flagged.send(sender=self)
+            else:
+                payment_was_successful.send(sender=self)
+        # Subscription signals:
+        else:
+            if self.is_subscription_cancellation():
+                subscription_cancel.send(sender=self)
+            elif self.is_subscription_signup():
+                subscription_signup.send(sender=self)
+            elif self.is_subscription_end_of_term():
+                subscription_eot.send(sender=self)
+            elif self.is_subscription_modified():
+                subscription_modify.send(sender=self)            

standard/models.py

@@ -2,8 +2,6 @@
 # -*- coding: utf-8 -*-
 from django.db import models
 from django.conf import settings
-
-from paypal.standard.signals import *
 from paypal.standard.helpers import duplicate_txn_id, check_secret
 from paypal.standard.conf import RECEIVER_EMAIL, POSTBACK_ENDPOINT, SANDBOX_POSTBACK_ENDPOINT
 
@@ -243,29 +241,14 @@ def get_endpoint(self):
         else:
             return POSTBACK_ENDPOINT
 
-    def send_signals(self):
-        """Shout for the world to hear whether a txn was successful."""
-        # Transaction signals:
-        if self.is_transaction():
-            if self.flag:
-                payment_was_flagged.send(sender=self)
-            else:
-                payment_was_successful.send(sender=self)
-        # Subscription signals:
-        else:
-            if self.is_subscription_cancellation():
-                subscription_cancel.send(sender=self)
-            elif self.is_subscription_signup():
-                subscription_signup.send(sender=self)
-            elif self.is_subscription_end_of_term():
-                subscription_eot.send(sender=self)
-            elif self.is_subscription_modified():
-                subscription_modify.send(sender=self) 
-
     def initialize(self, request):
         """Store the data we'll need to make the postback from the request object."""
         self.query = getattr(request, request.method).urlencode()
         self.ipaddress = request.META.get('REMOTE_ADDR', '')
+
+    def send_signals(self):
+        """After a transaction is completed use this to send success/fail signals"""
+        raise NotImplementedError
 
     def _postback(self):
         """Perform postback to PayPal and store the response in self.response."""

standard/pdt/models.py

@@ -14,9 +14,10 @@
 class PayPalSettingsError(Exception):
     """Raised when settings are incorrect."""
 
-if not hasattr(settings.PAYPAL_IDENTITY_TOKEN):
+try:
+    IDENTITY_TOKEN = settings.PAYPAL_IDENTITY_TOKEN
+except:
     raise PayPalSettingsError("You must set PAYPAL_IDENTITY_TOKEN in settings.py. Get this token by enabling PDT in your PayPal account.")
-IDENTITY_TOKEN = settings.PAYPAL_IDENTITY_TOKEN
 
 
 
@@ -71,4 +72,8 @@ def _verify_postback(self, response):
         qd.update(response_dict)
         qd.update(dict(ipaddress=self.ipaddress, st=self.st, flag_info=self.flag_info))
         pdt_form = PayPalPDTForm(qd, instance=self)
-        pdt_form.save(commit=False)  
+        pdt_form.save(commit=False)
+
+    def send_signals(self):
+        # Sendt the PDT signals...
+        pass