dav_registration: made the new JSON-View export a dict instead of a list

dav_registration/views.py

@@ -84,8 +84,11 @@ def EventListAsJSONView(request):
         filter_exp &= Q(sport__in=filter_cleaned) | Q(level__in=filter_cleaned)
 
     qs = Event.objects.filter(filter_exp).order_by('first_day', 'number').distinct()
-    data = [event.as_dict(json=True, add_registration_url=True) for event in qs]
-    response = JsonResponse(data, safe=False)
+    data = {}
+    for event in qs:
+        data[event.id] = event.as_dict(json=True, add_registration_url=True)
+
+    response = JsonResponse(data)
     return response