Cache access to cache object

src/pretix/base/models/event.py

@@ -264,7 +264,7 @@ class Event(EventMixin, LoggedModel):
 
     def save(self, *args, **kwargs):
         obj = super().save(*args, **kwargs)
-        self.get_cache().clear()
+        self.cache.clear()
         return obj
 
     def get_plugins(self) -> "list[str]":
@@ -281,6 +281,19 @@ class Event(EventMixin, LoggedModel):
         Django's built-in cache backends, but puts you into an isolated environment for
         this event, so you don't have to prefix your cache keys. In addition, the cache
         is being cleared every time the event or one of its related objects change.
+
+        .. deprecated:: 1.9
+           Use the property ``cache`` instead.
+        """
+        return self.cache
+
+    @cached_property
+    def cache(self):
+        """
+        Returns an :py:class:`ObjectRelatedCache` object. This behaves equivalent to
+        Django's built-in cache backends, but puts you into an isolated environment for
+        this event, so you don't have to prefix your cache keys. In addition, the cache
+        is being cleared every time the event or one of its related objects change.
         """
         from pretix.base.cache import ObjectRelatedCache
 
@@ -578,6 +591,16 @@ class SubEvent(EventMixin, LoggedModel):
         data.update({v.property.name: v.value for v in self.meta_values.select_related('property').all()})
         return data
 
+    def delete(self, *args, **kwargs):
+        super().delete(*args, **kwargs)
+        if self.event:
+            self.event.cache.clear()
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+        if self.event:
+            self.event.cache.clear()
+
 
 def generate_invite_token():
     return get_random_string(length=32, allowed_chars=string.ascii_lowercase + string.digits)
@@ -677,6 +700,16 @@ class EventMetaValue(LoggedModel):
     class Meta:
         unique_together = ('event', 'property')
 
+    def delete(self, *args, **kwargs):
+        super().delete(*args, **kwargs)
+        if self.event:
+            self.event.cache.clear()
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+        if self.event:
+            self.event.cache.clear()
+
 
 class SubEventMetaValue(LoggedModel):
     """
@@ -697,3 +730,13 @@ class SubEventMetaValue(LoggedModel):
 
     class Meta:
         unique_together = ('subevent', 'property')
+
+    def delete(self, *args, **kwargs):
+        super().delete(*args, **kwargs)
+        if self.subevent:
+            self.subevent.event.cache.clear()
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+        if self.subevent:
+            self.subevent.event.cache.clear()