Merge branch '240-custom-excuse-types-aren-t-counted-correctly-in' into 'prepare-release-3.0b0'

Resolve "Custom excuse types aren't counted correctly in generate_person_list_with_class_register_statistics"

See merge request AlekSIS/official/AlekSIS-App-Alsijil!326

CHANGELOG.rst

@@ -15,6 +15,7 @@ Fixed
   persons threw an error.
 * The redirection to generated class register PDF printouts did not work.
 * Some columns in the table showing statistics for the members of a group were labled wrongly.
+* Absences with custom excuse types were not counted correctly.
 
 `3.0b0`_ - 2022-02-28
 ---------------------

aleksis/apps/alsijil/model_extensions.py

@@ -482,7 +482,7 @@ def generate_person_list_with_class_register_statistics(
         persons = persons.annotate(
             **{
                 excuse_type.count_label: Count(
-                    "filtered_personal_notes__absent",
+                    "filtered_personal_notes",
                     filter=Q(
                         filtered_personal_notes__absent=True,
                         filtered_personal_notes__excuse_type=excuse_type,