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-rw-r--r--django/utils/functional.py4
-rw-r--r--tests/urlpatterns_reverse/tests.py11
2 files changed, 15 insertions, 0 deletions
diff --git a/django/utils/functional.py b/django/utils/functional.py
index 9e4df4b2f7..4c085d9c6d 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -95,6 +95,7 @@ def lazy(func, *resultclasses):
cls.__str__ = cls.__text_cast
else:
cls.__unicode__ = cls.__text_cast
+ cls.__str__ = cls.__bytes_cast_encoded
elif cls._delegate_bytes:
if six.PY3:
cls.__bytes__ = cls.__bytes_cast
@@ -117,6 +118,9 @@ def lazy(func, *resultclasses):
def __bytes_cast(self):
return bytes(func(*self.__args, **self.__kw))
+ def __bytes_cast_encoded(self):
+ return func(*self.__args, **self.__kw).encode('utf-8')
+
def __cast(self):
if self._delegate_bytes:
return self.__bytes_cast()
diff --git a/tests/urlpatterns_reverse/tests.py b/tests/urlpatterns_reverse/tests.py
index 310250152f..50a0881a41 100644
--- a/tests/urlpatterns_reverse/tests.py
+++ b/tests/urlpatterns_reverse/tests.py
@@ -318,6 +318,17 @@ class ReverseLazyTest(TestCase):
response = self.client.get('/login_required_view/')
self.assertEqual(response.status_code, 200)
+ def test_inserting_reverse_lazy_into_string(self):
+ self.assertEqual(
+ 'Some URL: %s' % reverse_lazy('some-login-page'),
+ 'Some URL: /login/'
+ )
+ if six.PY2:
+ self.assertEqual(
+ b'Some URL: %s' % reverse_lazy('some-login-page'),
+ 'Some URL: /login/'
+ )
+
class ReverseLazySettingsTest(AdminScriptTestCase):
"""