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[1.5.x] Properly support pickling of LazyObjects in Python 3.3 

Backport of 836cd26d7f3394452f1f5196eb26c99fef128a1a from master
This commit is contained in:
Ian Clelland 2012-09-28 12:57:38 -07:00 committed by Luke Plant
parent 3deed32394
commit b430e1db5f
1 changed files with 10 additions and 0 deletions
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10
django/utils/functional.py
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@ -293,6 +293,16 @@ class SimpleLazyObject(LazyObject):
self._setup() self._setup()
return self._wrapped.__dict__ 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 # Need to pretend to be the wrapped class, for the sake of objects that care
# about this (especially in equality tests) # about this (especially in equality tests)
__class__ = property(new_method_proxy(operator.attrgetter("__class__"))) __class__ = property(new_method_proxy(operator.attrgetter("__class__")))