Add missing doc strings for forms and helpers

aleksis/apps/alsijil/forms.py

@@ -262,6 +262,8 @@ class GroupRoleAssignmentEditForm(forms.ModelForm):
 
 
 class FilterRegisterObjectForm(forms.Form):
+    """Form for filtering register objects in ``RegisterObjectTable``."""
+
     layout = Layout(
         Row("school_term", "date_start", "date_end"), Row("has_documentation", "group", "subject")
     )
@@ -317,4 +319,6 @@ class FilterRegisterObjectForm(forms.Form):
 
 
 class RegisterObjectActionForm(ListActionForm):
+    """Action form for managing register objects for use with ``RegisterObjectTable``."""
+
     actions = [send_request_to_check_entry]

aleksis/apps/alsijil/preferences.py

@@ -114,6 +114,8 @@ class ShowGroupRolesInLessonView(BooleanPreference):
 
 @person_preferences_registry.register
 class RegisterObjectsTableItemsPerPage(IntegerPreference):
+    """Preference how many items are shown per page in ``RegisterObjectTable``."""
+
     section = alsijil
     name = "register_objects_table_items_per_page"
     default = 100

aleksis/apps/alsijil/util/alsijil_helpers.py

@@ -111,6 +111,7 @@ def _filter_register_objects_by_dict(
     register_objects: QuerySet[Union[LessonPeriod, Event, ExtraLesson]],
     label_: str,
 ) -> QuerySet[Union[LessonPeriod, Event, ExtraLesson]]:
+    """Filter register objects by a dictionary generated through ``FilterRegisterObjectForm``."""
     if label_ == LessonPeriod.label_:
         register_objects = register_objects.filter(
             lesson__validity__school_term=filter_dict.get("school_term")