From a3707a962b220131a972a839373ed294c690fe93 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Mon, 15 Jul 2019 10:46:38 +0200
Subject: [PATCH] Fix problems with CartMixin on empty order

Fix PRETIXEU-18A
---
 src/pretix/presale/views/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pretix/presale/views/__init__.py b/src/pretix/presale/views/__init__.py
index 9363be7eb..927c5f022 100644
--- a/src/pretix/presale/views/__init__.py
+++ b/src/pretix/presale/views/__init__.py
@@ -50,7 +50,7 @@ class CartMixin:
         return self.request._checkout_flow_invoice_address
 
     def get_cart(self, answers=False, queryset=None, order=None, downloads=False):
-        if queryset:
+        if queryset is not None:
             prefetch = []
             if answers:
                 prefetch.append('item__questions')