Ticket #13328: patch_v2_13328.diff

django/db/models/fields/__init__.py

@@ -132 +132 @@
         memodict[id(self)] = obj
         return obj
 
+    def __getstate__(self):
+        obj_dict = self.__dict__.copy()
+        obj_dict['default'] = None
+        return obj_dict
+
+    def __setstate__(self, data):
+        self.__dict__.update(data)
+
+        # Restore the default
+        for field in self._model._meta.fields:
+            if self.name == field.name:
+                self.default = field.default
+
+
     def to_python(self, value):
         """
         Converts the input value into the expected Python data type, raising
@@ -233 +247 @@
 
     def contribute_to_class(self, cls, name):
         self.set_attributes_from_name(name)
+        self._model = cls
         cls._meta.add_field(self)
         if self.choices:
             setattr(cls, 'get_%s_display' % self.name, curry(cls._get_FIELD_display, field=self))