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-rw-r--r--django/utils/functional.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/django/utils/functional.py b/django/utils/functional.py
index 92be506f3b..93c1cc1984 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -26,6 +26,10 @@ class cached_property:
self.name = name or func.__name__
def __get__(self, instance, cls=None):
+ """
+ Call the function and replace this cached_property instance with the
+ return value so that the function and this method aren't called again.
+ """
if instance is None:
return self
res = instance.__dict__[self.name] = self.func(instance)