From 3c535f0d5eb827054fb1413b15380145b5514a70 Mon Sep 17 00:00:00 2001
From: Dave Hall <david@etianen.com>
Date: Tue, 30 Nov 2010 12:52:03 +0000
Subject: [PATCH] Fixed the problem with reverting file fields in the admin.
 Finally get to close issue #1 :O
 https://github.com/etianen/django-reversion/issues#issue/1

---
 src/reversion/admin.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/reversion/admin.py b/src/reversion/admin.py
index 7a5bbb83..eb722c6c 100644
--- a/src/reversion/admin.py
+++ b/src/reversion/admin.py
@@ -155,6 +155,10 @@ def render_revision_form(self, request, obj, version, context, revert=False, rec
             if form.is_valid():
                 form_validated = True
                 new_object = self.save_form(request, form, change=True)
+                # HACK: If the value of a file field is None, remove the file from the model.
+                for field in new_object._meta.fields:
+                    if isinstance(field, models.FileField) and form.cleaned_data[field.name] is None:
+                        setattr(new_object, field.name, None)
             else:
                 form_validated = False
                 new_object = obj