Fix for pks returning as strings when set in pre_save. Fixes #482. Thanks to @n8agrin for the bug report.

1 files changed, 4 insertions, 0 deletions

diff --git a/rest_framework/mixins.py b/rest_framework/mixins.py
index 1edcfa5c..8dc0c329 100644
--- a/rest_framework/mixins.py
+++ b/rest_framework/mixins.py
@@ -113,6 +113,10 @@ class UpdateModelMixin(object):
             slug_field = self.get_slug_field()
             setattr(obj, slug_field, slug)
 
+        # Ensure we clean the attributes so that we don't eg return integer
+        # pk using a string representation, as provided by the url conf kwarg.
+        obj.full_clean()
+
 
 class DestroyModelMixin(object):
     """