Fixed #4459 -- Added 'raw' argument to save method, to override any pre-save processing, and modified serializers to use a raw-save. This enables serialization of DateFields with auto_now/auto_now_add. Also modified serializers to invoke save() directly on the model baseclass, to avoid any (potentially order-dependent, data modifying) behavior in a custom save() method.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@5658 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/serializers/base.py

@@ -158,7 +158,12 @@ class DeserializedObject(object):
         return "<DeserializedObject: %s>" % smart_str(self.object)
 
     def save(self, save_m2m=True):
-        self.object.save()
+        # Call save on the Model baseclass directly. This bypasses any 
+        # model-defined save. The save is also forced to be raw.
+        # This ensures that the data that is deserialized is literally 
+        # what came from the file, not post-processed by pre_save/save
+        # methods.
+        models.Model.save(self.object, raw=True)
         if self.m2m_data and save_m2m:
             for accessor_name, object_list in self.m2m_data.items():
                 setattr(self.object, accessor_name, object_list)