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Diffstat (limited to 'django/utils/functional.py')
| -rw-r--r-- | django/utils/functional.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/django/utils/functional.py b/django/utils/functional.py index e52ab76a38..b66fdd3012 100644 --- a/django/utils/functional.py +++ b/django/utils/functional.py @@ -147,6 +147,12 @@ def lazy(func, *resultclasses): the lazy evaluation code is triggered. Results are not memoized; the function is evaluated on every access. """ + # When lazy() is called by the __reduce_ex__ machinery to reconstitute the + # __proxy__ class it can't call with *args, so the first item will just be + # a tuple. + if len(resultclasses) == 1 and isinstance(resultclasses[0], tuple): + resultclasses = resultclasses[0] + class __proxy__(Promise): """ Encapsulate a function call and act as a proxy for methods that are @@ -162,6 +168,9 @@ def lazy(func, *resultclasses): if self.__dispatch is None: self.__prepare_class__() + def __reduce_ex__(self, protocol): + return (lazy, (self.__func, resultclasses), self.__dict__) + def __prepare_class__(cls): cls.__dispatch = {} for resultclass in resultclasses: |