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Properly support pickling of LazyObjects in Python 3.3

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commit 3266c26eb22599a5577d41856baa04e99f87efe4 1 parent bdcd2f6
Ian Clelland clelland authored spookylukey committed
Showing with 10 additions and 0 deletions.
  1. +10 −0 django/utils/functional.py
10 django/utils/functional.py
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@@ -293,6 +293,16 @@ def __getstate__(self):
self._setup()
return self._wrapped.__dict__
+ # Python 3.3 will call __reduce__ when pickling; these methods are needed
+ # to serialize and deserialize correctly. They are not called in earlier
+ # versions of Python.
+ @classmethod
+ def __newobj__(cls, *args):
+ return cls.__new__(cls, *args)
+
+ def __reduce__(self):
+ return (self.__newobj__, (self.__class__,), self.__getstate__())
+
# Need to pretend to be the wrapped class, for the sake of objects that care
# about this (especially in equality tests)
__class__ = property(new_method_proxy(operator.attrgetter("__class__")))
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