Django not matching unicode in url

Question

I have a problem with django 2.0, where a url that contains a unicode slug isn't matched, I searched for a solution but I didn't find one for my case, here's a simplified version of my code:

// models.py

class Level(models.Model):
    name = models.CharField(max_length=100)
    slug = models.SlugField(max_length=100, allow_unicode=True)

in my urls file I have those patterns:

// urls.py

urlpatterns = [
path('', views.index, name='index'),
path('level/<slug:level_slug>', views.level, name='level')]

Now if I go, say to http://127.0.0.1:8000/game/level/deuxième I get this error:

Request Method: GET
Request URL:    http://127.0.0.1:8000/game/level/deuxi%C3%A8me

Using the URLconf defined in mysite.urls, Django tried these URL patterns, in this order:

game/ [name='index']
game/level/<slug:level_slug> [name='level']
admin/
accounts/
The current path, game/level/deuxième, didn't match any of these.

but if I change the item's slug to deuxieme without the unicode character, it works fine, does anyone know the solution to this problem? thanks!

Answer 1

In urls.py change path from using slug type to str.

From this:

    path('posts/<slug:slug>-<int:pk>/', views.PostDetailView.as_view()),

to this:

    path('posts/<str:slug>-<int:pk>/', views.PostDetailView.as_view()),

---

Explanation

As suggested in comments, the slug path converter

Matches any slug string consisting of ASCII letters or numbers, plus the hyphen and underscore characters. For example, building-your-1st-django-site.

but we want to keep those non-ascii characters, so we use str:

str - Matches any non-empty string, excluding the path separator, '/'. This is the default if a converter isn’t included in the expression.