manager: avoid crash in partial bookings month view if multiple checks (#82234)

chrono/manager/views.py

@@ -1956,7 +1956,10 @@ class AgendaWeekMonthMixin:
             )
             user_bookings = booking_info['bookings']
 
-            if booking.user_check:
+            if len(booking.user_checks.all()) == 2:
+                # one of the checks must be presence, display it
+                booking.check_css_class = 'present'
+            elif booking.user_check:
                 booking.check_css_class = 'present' if booking.user_check.presence else 'absent'
 
             user_bookings[localtime(booking.event.start_datetime).day - 1] = booking

tests/manager/test_partial_bookings.py

@@ -1014,7 +1014,13 @@ def test_manager_partial_bookings_month_view(app, admin_user, freezer):
         end_time=datetime.time(10, 00),
         event=event,
     )
-    booking.mark_user_presence(start_time=datetime.time(8, 00), end_time=datetime.time(10, 00))
+    booking.mark_user_presence(start_time=datetime.time(8, 00), end_time=datetime.time(9, 00))
+    BookingCheck.objects.create(
+        booking=booking,
+        start_time=datetime.time(9, 00),
+        end_time=datetime.time(10, 00),
+        presence=False,  # second 'absence' check will be ignored
+    )
     booking = Booking.objects.create(
         user_external_id='user:3',
         user_first_name='User',