Fix constraint for datetime_start before datetime_end

aleksis/core/migrations/0071_constrain_calendar_event_starting_before_ending.py

@@ -10,7 +10,7 @@ class Migration(migrations.Migration):
     operations = [
         migrations.AddConstraint(
             model_name='calendarevent',
-            constraint=models.CheckConstraint(check=Q(datetime_end__gt=F('datetime_start')),
+            constraint=models.CheckConstraint(check=Q(datetime_end__gte=F('datetime_start')),
                                               name="datetime_start_before_end"
             ),
         ),

aleksis/core/models.py

@@ -1707,7 +1707,7 @@ class CalendarEvent(CalendarEventMixin, ExtensiblePolymorphicModel, RecurrenceMo
                 name="datetime_end_or_date_end",
             ),
             models.CheckConstraint(
-                check=Q(datetime_end__gt=F("datetime_start")), name="datetime_start_before_end"
+                check=Q(datetime_end__gte=F("datetime_start")), name="datetime_start_before_end"
             ),
             models.CheckConstraint(
                 check=Q(date_end__gte=F("date_start")), name="date_start_before_end"