Fix queryset for absence calendar event

aleksis/apps/kolego/managers.py

-from polymorphic.managers import PolymorphicQuerySet
-
-from aleksis.core.managers import DateRangeQuerySetMixin
+from aleksis.core.managers import DateRangeQuerySetMixin, RecurrencePolymorphicQuerySet
 from aleksis.core.models import Person
 
 
-class AbsenceQuerySet(DateRangeQuerySetMixin, PolymorphicQuerySet):
+class AbsenceQuerySet(DateRangeQuerySetMixin, RecurrencePolymorphicQuerySet):
     """QuerySet with custom query methods for absences."""
 
     def absent_persons(self):

aleksis/apps/kolego/models/absence.py

@@ -5,7 +5,9 @@ from django.utils.translation import gettext_lazy as _
 
 from colorfield.fields import ColorField
 
-from aleksis.core.managers import PolymorphicBaseManager
+from aleksis.core.managers import (
+    RecurrencePolymorphicManager,
+)
 from aleksis.core.mixins import ExtensibleModel
 from aleksis.core.models import FreeBusy
 
@@ -69,7 +71,7 @@ class AbsenceReason(ExtensibleModel):
 
 
 class Absence(FreeBusy):
-    objects = PolymorphicBaseManager.from_queryset(AbsenceQuerySet)()
+    objects = RecurrencePolymorphicManager.from_queryset(AbsenceQuerySet)()
 
     reason = models.ForeignKey(
         "AbsenceReason",
@@ -89,9 +91,9 @@ class Absence(FreeBusy):
 
     @classmethod
     def get_objects(
-        cls, request: HttpRequest | None = None, params: dict[str, any] | None = None
+        cls, request: HttpRequest | None = None, params: dict[str, any] | None = None, **kwargs
     ) -> QuerySet:
-        qs = super().get_objects(request, params).select_related("person", "reason")
+        qs = super().get_objects(request, params, **kwargs).select_related("person", "reason")
         if params:
             if params.get("person"):
                 qs = qs.filter(person_id=params["person"])