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Fixed #15811 - lazy() doesn't take into account methods defined in pa…

…rents

Thanks to abki for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16157 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit 23b32c75545e1f48e059fae125f94314a99dcb89 1 parent 127f1e4
@spookylukey spookylukey authored
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17 django/utils/functional.py
@@ -68,14 +68,15 @@ def __prepare_class__(cls):
cls.__dispatch = {}
for resultclass in resultclasses:
cls.__dispatch[resultclass] = {}
- for (k, v) in resultclass.__dict__.items():
- # All __promise__ return the same wrapper method, but they
- # also do setup, inserting the method into the dispatch
- # dict.
- meth = cls.__promise__(resultclass, k, v)
- if hasattr(cls, k):
- continue
- setattr(cls, k, meth)
+ for type_ in reversed(resultclass.mro()):
+ for (k, v) in type_.__dict__.items():
+ # All __promise__ return the same wrapper method, but they
+ # also do setup, inserting the method into the dispatch
+ # dict.
+ meth = cls.__promise__(resultclass, k, v)
+ if hasattr(cls, k):
+ continue
+ setattr(cls, k, meth)
cls._delegate_str = str in resultclasses
cls._delegate_unicode = unicode in resultclasses
assert not (cls._delegate_str and cls._delegate_unicode), "Cannot call lazy() with both str and unicode return types."
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13 tests/regressiontests/utils/functional.py
@@ -7,3 +7,16 @@ def test_lazy(self):
t = lazy(lambda: tuple(range(3)), list, tuple)
for a, b in zip(t(), range(3)):
self.assertEqual(a, b)
+
+ def test_lazy_base_class(self):
+ """Test that lazy also finds base class methods in the proxy object"""
+
+ class Base(object):
+ def base_method(self):
+ pass
+
+ class Klazz(Base):
+ pass
+
+ t = lazy(lambda: Klazz(), Klazz)()
+ self.assertTrue('base_method' in dir(t))
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