From 1b9a9aa25bd4a5a1ff6a47dc3d1262af3f4f3960 Mon Sep 17 00:00:00 2001
From: "Jonas I. Liechti" <j-i-l@users.noreply.github.com>
Date: Wed, 24 Jan 2018 15:26:05 +0100
Subject: [PATCH] Fix raise of exception in case prep value is None

---
 sanitizer/models.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sanitizer/models.py b/sanitizer/models.py
index afc2590..229f27e 100644
--- a/sanitizer/models.py
+++ b/sanitizer/models.py
@@ -48,6 +48,8 @@ def to_python(self, value):
         return smart_unicode(value)
 
     def get_prep_value(self, value):
+        if value is None:
+            value = u''
         value = super(SanitizedTextField, self).get_prep_value(value)
         value = bleach.clean(value, tags=self._sanitizer_allowed_tags,
             attributes=self._sanitizer_allowed_attributes,