Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

core/views/views.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, Optional, Type, cast
+from typing import Any, Dict, Optional, Type
 from django.shortcuts import redirect
 from django.urls import reverse
 from django.views.generic import DetailView
@@ -6,13 +6,15 @@ from django.views import View
 from django.http import HttpRequest, HttpResponse
 from django.db.models import Model
 
+
 class SlugRedirectMixin(View):
     """
     Mixin that handles redirects for old slugs.
     Requires the model to inherit from SluggedModel and view to inherit from DetailView.
     """
+
     model: Optional[Type[Model]] = None
-    slug_url_kwarg: str = 'slug'
+    slug_url_kwarg: str = "slug"
     object: Optional[Model] = None
 
     def dispatch(self, request: HttpRequest, *args: Any, **kwargs: Any) -> HttpResponse:
@@ -25,19 +27,18 @@ class SlugRedirectMixin(View):
             self.object = self.get_object()  # type: ignore
             # Check if we used an old slug
             current_slug = kwargs.get(self.slug_url_kwarg)
-            if current_slug and current_slug != getattr(self.object, 'slug', None):
+            if current_slug and current_slug != getattr(self.object, "slug", None):
                 # Get the URL pattern name from the view
                 url_pattern = self.get_redirect_url_pattern()
                 # Build kwargs for reverse()
                 reverse_kwargs = self.get_redirect_url_kwargs()
                 # Redirect to the current slug URL
                 return redirect(
-                    reverse(url_pattern, kwargs=reverse_kwargs),
-                    permanent=True
+                    reverse(url_pattern, kwargs=reverse_kwargs), permanent=True
                 )
             return super().dispatch(request, *args, **kwargs)
         except (AttributeError, Exception) as e:  # type: ignore
-            if self.model and hasattr(self.model, 'DoesNotExist'):
+            if self.model and hasattr(self.model, "DoesNotExist"):
                 if isinstance(e, self.model.DoesNotExist):  # type: ignore
                     return super().dispatch(request, *args, **kwargs)
             return super().dispatch(request, *args, **kwargs)
@@ -58,4 +59,4 @@ class SlugRedirectMixin(View):
         """
         if not self.object:
             return {}
-        return {self.slug_url_kwarg: getattr(self.object, 'slug', '')}
+        return {self.slug_url_kwarg: getattr(self.object, "slug", "")}