license: better error reporting in yandex_pay view

project/customer/views/license.py

@@ -26,7 +26,8 @@ def yandex_pay(request, payment_id):
     template_name = 'customer/profile/yandex.html'
     payment = Payment.objects.get(id=payment_id)
     if payment.user != request.user:
-        raise
+        raise Exception(u'[yandex_pay error] Different users! | payment.user_id = %d ; request.user_id = %d' % (payment.user_id, request.user.pk,))
+
     form = YaForm(instance=payment)
     return render(request, template_name, {'form': form,
                                            'ya_url': settings.YANDEX_MONEY_PAYMENT_URL})