Non-ASCII fieldset names are not displayed in the admin

[Namhong Kim]

In Django ModelAdmin, when defining fieldsets with Korean characters or using gettext_lazy, the fieldset names do not display correctly. This issue occurs because the slugify filter has allow_unicode set to False, which removes all non-ASCII characters.

class BlogAdmin(admin.ModelAdmin):
    fieldsets = [
        ("이름", {"fields": ["name"]}),
    ]

[Sarah Boyce]

Replicated thank you! Regression in 01ed59f753139afb514170ee7f7384c155ecbc2d

Possible regression test:

tests/admin_views/admin.py

@@ -237 +237 @@
             "Some other fields",
             {"classes": ("wide",), "fields": ("date", "section", "sub_section")},
         ),
+        ("이름", {"fields": ("another_section",)}),
     )
 
     # These orderings aren't particularly useful but show that expressions can

tests/admin_views/tests.py

@@ -2533 +2533 @@
         self.assertContains(
             response, '<input type="submit" value="Save and view" name="_continue">'
         )
+        self.assertContains(response, "Some fields")
+        self.assertContains(response, "Some other fields")
+        self.assertContains(response, "이름")
         post = self.client.post(
             reverse("admin:admin_views_article_add"), add_dict, follow=False
         )

[Sarah Boyce <42296566+sarahboyce@…>]

In 2c029c71:

Fixed #35876 -- Displayed non-ASCII fieldset names when rendering ModelAdmin.fieldsets.

Thank you to Namhong Kim for the report, and to Mariusz Felisiak and Marijke Luttekes for the review.

Regression in 01ed59f753139afb514170ee7f7384c155ecbc2d.

[Sarah Boyce <42296566+sarahboyce@…>]

In 9fa2d23:

[5.1.x] Fixed #35876 -- Displayed non-ASCII fieldset names when rendering ModelAdmin.fieldsets.

Thank you to Namhong Kim for the report, and to Mariusz Felisiak and Marijke Luttekes for the review.

Regression in 01ed59f753139afb514170ee7f7384c155ecbc2d.

Backport of 2c029c718f45341cdd43ee094c24488743c633e6 from main.

[Namhong Kim]

Thank you, Sarah Boyce