dnscms: prefetch and select related when quering future events

dnscms/events/models.py

@@ -1,7 +1,7 @@
 from django import forms
 from django.core.exceptions import ValidationError
 from django.db import models
-from django.db.models import Min, Q, UniqueConstraint
+from django.db.models import Min, Prefetch, Q, UniqueConstraint
 from django.utils import timezone
 from django.utils.html import mark_safe
 from django.utils.translation import gettext_lazy as _
@@ -45,7 +45,23 @@ class EventIndex(HeadlessMixin, Page):
     subpage_types = ["events.EventPage"]
 
     def future_events(self, info, **kwargs):
-        return EventPage.objects.live().future().order_by("next_occurrence")
+        return (
+            EventPage.objects.live()
+            .future()
+            .order_by("next_occurrence")
+            .select_related("featured_image")
+            .prefetch_related(
+                Prefetch(
+                    "occurrences",
+                    queryset=EventOccurrence.objects.select_related("venue"),
+                ),
+                "categories",
+                Prefetch(
+                    "organizers",
+                    queryset=EventOrganizer.objects.select_related("association"),
+                ),
+            )
+        )
 
     graphql_fields = [
         GraphQLCollection(