Fix datetime handling

aleksis/apps/chronos/frontend/components/calendar_feeds/details/LessonDetails.vue

@@ -2,7 +2,8 @@
   <base-calendar-feed-details
     v-bind="$props"
     :color="currentSubject ? currentSubject.colour_bg : null"
-  >
+    without-location
+      >
     <template #title>
       <div
         :style="{
@@ -232,9 +233,8 @@ export default {
       return {
         ...item,
         amends: this.selectedEvent.meta.id,
-        // LessonEvent has datetime in UTC & graphql does not like the Z timezone info
-        datetimeStart: this.selectedEvent.start.toISOString().replace("Z", ""),
-        datetimeEnd: this.selectedEvent.end.toISOString().replace("Z", ""),
+        datetimeStart: this.selectedEvent.startDateTime.toISO(),
+        datetimeEnd: this.selectedEvent.endDateTime.toISO(),
       };
     },
     transformPatchData(item) {

aleksis/apps/chronos/schema/__init__.py

@@ -73,21 +73,6 @@ class AmendLessonCreateMutation(DjangoCreateMutation):
             "comment",
         )
 
-    @classmethod
-    def handle_datetime_start(cls, value, name, info) -> int:
-        value = value.replace(tzinfo=timezone.utc)
-        return value
-
-    @classmethod
-    def handle_datetime_end(cls, value, name, info) -> int:
-        value = value.replace(tzinfo=timezone.utc)
-        return value
-
-    @classmethod
-    def before_save(cls, root, info, input, obj):
-        obj.timezone = obj.amends.timezone
-        return obj
-
 
 class AmendLessonPatchMutation(DjangoPatchMutation):
     class Meta:
@@ -95,20 +80,6 @@ class AmendLessonPatchMutation(DjangoPatchMutation):
         permissions = ("chronos.edit_substitution_rule",)
         only_fields = ("subject", "teachers", "groups", "rooms", "cancelled", "comment")
 
-    @classmethod
-    def handle_datetime_start(cls, value, name, info) -> int:
-        value = value.replace(tzinfo=timezone.utc)
-        return value
-
-    @classmethod
-    def handle_datetime_end(cls, value, name, info) -> int:
-        value = value.replace(tzinfo=timezone.utc)
-        return value
-
-    @classmethod
-    def before_save(cls, root, info, input, id, obj):
-        obj.timezone = obj.amends.timezone
-        return obj
 
 
 class TimetableType(graphene.Enum):