Optimize query

aleksis/apps/kolego/models/absence.py

 from django.db import models
-from django.db.models import QuerySet
+from django.db.models import Q, QuerySet
 from django.http import HttpRequest
 from django.utils.translation import gettext_lazy as _
 
@@ -110,16 +110,24 @@ class Absence(FreeBusy):
 
     @classmethod
     def get_objects(
-        cls, request: HttpRequest | None = None, params: dict[str, any] | None = None, **kwargs
+        cls,
+        request: HttpRequest | None = None,
+        params: dict[str, any] | None = None,
+        additional_filter: Q | None = None,
+        **kwargs,
     ) -> QuerySet:
-        qs = super().get_objects(request, params, **kwargs).select_related("person", "reason")
+        q = additional_filter or Q()
         if params:
             if params.get("person"):
-                qs = qs.filter(person_id=params["person"])
+                q = q & Q(person_id=params["person"])
             elif params.get("persons"):
-                qs = qs.filter(person_id__in=params["persons"])
+                q = q & Q(person_id__in=params["persons"])
             elif params.get("group"):
-                qs = qs.filter(person__member_of__id=params.get("group"))
+                q = q & Q(person__member_of__id=params.get("group"))
+        qs = super().get_objects(
+            request, params, additional_filter=q, select_related=["person", "reason"], **kwargs
+        )
+
         return qs
 
     @classmethod