Added a class based CategoryDetailView that should be functionally identical to the original function based view.

categories/views.py

@@ -1,6 +1,6 @@
 from django.shortcuts import get_object_or_404
 from django.template import RequestContext
-from django.http import HttpResponse
+from django.http import HttpResponse, Http404
 from django.views.decorators.cache import cache_page
 from django.template.loader import select_template
 from categories.models import Category
@@ -30,4 +30,48 @@ def category_detail(request, path,
     context.update({'category':category})
     if extra_context:
         context.update(extra_context)
-    return HttpResponse(select_template(templates).render(context))
+    return HttpResponse(select_template(templates).render(context))
+
+
+import django
+if django.VERSION[0] >= 1 and django.VERSION[1] >= 3:
+    from django.views.generic import DetailView
+
+    class CategoryDetailView(DetailView):
+
+        model = Category
+        path_field = 'path'
+
+        def get_object(self, **kwargs):
+            if self.path_field not in self.kwargs:
+                raise AttributeError(u"Category detail view %s must be called with "
+                                     u"a %s." % self.__class__.__name__, self.path_field)
+            if self.queryset is None:
+                 queryset = self.get_queryset()
+
+            self.path_items = self.kwargs[self.path_field].strip('/').split('/')
+            if len(self.path_items) >= 2:
+                queryset = queryset.filter(
+                    slug__iexact = self.path_items[-1],
+                    level = len(self.path_items)-1,
+                    parent__slug__iexact=self.path_items[-2])
+            else:
+                queryset = queryset.filter(
+                    slug__iexact = self.path_items[-1],
+                    level = len(self.path_items)-1)
+
+            try:
+                obj = queryset.get()
+            except ObjectDoesNotExist:
+                raise Http404(_(u"No %(verbose_name)s found matching the query") %
+                              {'verbose_name': queryset.model._meta.verbose_name})
+            return obj
+        
+        def get_template_names(self):
+            names = []
+            path_items = self.path_items
+            while path_items:
+                names.append('categories/%s.html' % '_'.join(path_items))
+                path_items.pop()
+            names.extend(super(CategoryDetailView, self).get_template_names())
+            return names