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Copy filter_backends class attribute before returning it.

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This commit is contained in:
Tom Christie 2014-08-18 15:34:23 +01:00
parent 8244c7cc33
commit 9f3c7e8930
1 changed files with 8 additions and 1 deletions
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9
rest_framework/generics.py
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@ -189,7 +189,13 @@ class GenericAPIView(views.APIView):
""" """
Returns the list of filter backends that this view requires. Returns the list of filter backends that this view requires.
""" """
filter_backends = self.filter_backends or [] if self.filter_backends is None:
filter_backends = []
else:
# Note that we are returning a *copy* of the class attribute,
# so that it is safe for the view to mutate it if needed.
filter_backends = list(self.filter_backends)
if not filter_backends and self.filter_backend: if not filter_backends and self.filter_backend:
warnings.warn( warnings.warn(
'The `filter_backend` attribute and `FILTER_BACKEND` setting ' 'The `filter_backend` attribute and `FILTER_BACKEND` setting '
@ -199,6 +205,7 @@ class GenericAPIView(views.APIView):
PendingDeprecationWarning, stacklevel=2 PendingDeprecationWarning, stacklevel=2
) )
filter_backends = [self.filter_backend] filter_backends = [self.filter_backend]
return filter_backends return filter_backends