Use Django's method for class properties

website/common/models.py

@@ -1,4 +1,5 @@
 from django.db import models
+from django.utils.functional import classproperty
 from wagtail.admin.panels import FieldPanel
 from wagtail.models import Page
 
@@ -7,8 +8,7 @@ class BasePage(Page):
     class Meta:
         abstract = True
 
-    @classmethod
-    @property
+    @classproperty
     def body_class(cls) -> str:
         return "page-" + cls._meta.db_table.replace("_", "-")