Add filter to TechGroup's Event prefetch.

src/web/views.py

@@ -2,6 +2,7 @@
 
 from django.contrib import messages
 from django.contrib.auth.mixins import UserPassesTestMixin
+from django.db.models import Prefetch
 from django.http import HttpRequest, HttpResponse
 from django.shortcuts import redirect
 from django.template import loader
@@ -164,7 +165,9 @@ class DetailTechGroup(HtmxViewMixin, DetailView):
     model = TechGroup
 
     def __init__(self, **kwargs: Any) -> None:
-        self.queryset = TechGroup.objects.prefetch_related("event_set")
+        self.queryset = TechGroup.objects.prefetch_related(
+            Prefetch("event_set", Event.objects.filter(date_time__gte=timezone.localtime()))
+        )
         super().__init__(**kwargs)
 
     def get_context_data(self, **kwargs: Any) -> dict[str, Any]: