Uses class method to get list of instance admins

Re-writing this query over and over is a bad approach

bookwyrm/models/antispam.py

@@ -61,10 +61,7 @@ def automod_task():
     if not reports:
         return
 
-    admins = User.objects.filter(
-        models.Q(user_permissions__name__in=["moderate_user", "moderate_post"])
-        | models.Q(is_superuser=True)
-    ).all()
+    admins = User.admins()
     notification_model = apps.get_model("bookwyrm", "Notification", require_ready=True)
     with transaction.atomic():
         for admin in admins:

bookwyrm/models/notification.py

@@ -231,10 +231,7 @@ def notify_admins_on_report(sender, instance, created, *args, **kwargs):
         return
 
     # moderators and superusers should be notified
-    admins = User.objects.filter(
-        models.Q(user_permissions__name__in=["moderate_user", "moderate_post"])
-        | models.Q(is_superuser=True)
-    ).all()
+    admins = User.admins()
     for admin in admins:
         notification, _ = Notification.objects.get_or_create(
             user=admin,

bookwyrm/models/user.py

@@ -231,6 +231,14 @@ class User(OrderedCollectionPageMixin, AbstractUser):
             queryset = queryset.exclude(blocks=viewer)
         return queryset
 
+    @classmethod
+    def admins(cls):
+        """Get a queryset of the admins for this instance"""
+        return cls.objects.filter(
+            models.Q(user_permissions__name__in=["moderate_user", "moderate_post"])
+            | models.Q(is_superuser=True)
+        )
+
     def update_active_date(self):
         """this user is here! they are doing things!"""
         self.last_active_date = timezone.now()

bookwyrm/views/landing/about.py

@@ -19,9 +19,7 @@ def about(request):
         "status_count": models.Status.objects.filter(
             user__local=True, deleted=False
         ).count(),
-        "admins": models.User.objects.filter(
-            groups__name__in=["admin", "moderator"]
-        ).distinct(),
+        "admins": models.User.admins(),
         "version": settings.VERSION,
     }