Fixed #28456 -- Allowed customizing Model pickling by overriding __getstate__().

1 files changed, 5 insertions, 1 deletions

diff --git a/django/db/models/base.py b/django/db/models/base.py
index dda2248308..3cff2d2fc4 100644
--- a/django/db/models/base.py
+++ b/django/db/models/base.py
@@ -522,11 +522,15 @@ class Model(metaclass=ModelBase):
         return hash(self.pk)
 
     def __reduce__(self):
-        data = self.__dict__
+        data = self.__getstate__()
         data[DJANGO_VERSION_PICKLE_KEY] = get_version()
         class_id = self._meta.app_label, self._meta.object_name
         return model_unpickle, (class_id,), data
 
+    def __getstate__(self):
+        """Hook to allow choosing the attributes to pickle."""
+        return self.__dict__
+
     def __setstate__(self, state):
         msg = None
         pickled_version = state.get(DJANGO_VERSION_PICKLE_KEY)