Escaping needed during lazy reversing of non-ascii URLs

[Jannis Vajen]

# urls.py
url(ur'^umläute_in_der_url/', include('my_app.urls')),

Reversing the above URL with non-ascii characters returns a properly percent-encoded string (i.e. 'uml%C3%A4ute_in_der_url').

But a problem occurs while passing the named URL to reverse_lazy because around line 164 in django.utils.functional.lazy.__mod__ a string formatting takes place which leads to a ValueError due to the unescaped percent-encoding.

ValueError: unsupported format character 'C' (0x43)

 return bytes(self) % rhs

[Baptiste Mispelon]

Hi,

I can't seem to be able to reproduce this:

# urls.py

...
url(r'^é/$', view=..., name='foo')
...


>>> print(reverse('foo'))
/%C3%A9/
>>> print(reverse_lazy('foo'))
/%C3%A9/

Can you provide more information as to how you can trigger that error?

Thanks