Fix absence batch editing

aleksis/apps/kolego/frontend/components/Absences.vue

@@ -13,6 +13,7 @@ import DateTimeField from "aleksis.core/components/generic/forms/DateTimeField.v
     :gql-create-mutation="gqlCreateMutation"
     :gql-patch-mutation="gqlPatchMutation"
     :gql-delete-mutation="gqlDeleteMutation"
+    :get-patch-data="getPatchData"
     :default-item="defaultItem"
   >
     <template #datetimeStart="{ item }">
@@ -64,6 +65,7 @@ import DateTimeField from "aleksis.core/components/generic/forms/DateTimeField.v
           v-on="on"
           required
           :rules="required"
+	  return-object
         />
       </div>
     </template>
@@ -83,6 +85,7 @@ import DateTimeField from "aleksis.core/components/generic/forms/DateTimeField.v
           item-value="id"
           v-bind="attrs"
           v-on="on"
+	  return-object
         />
       </div>
     </template>
@@ -140,6 +143,18 @@ export default {
       required: [(value) => !!value || this.$t("forms.errors.required")],
     };
   },
+  methods: {
+    getPatchData(items) {
+      return items.map((item) => ({
+        id: item.id,
+        datetimeStart: item.datetimeStart,
+        datetimeEnd: item.datetimeEnd,
+        person: item.person.id,
+        reason: item.reason.id,
+        comment: item.comment,
+      }));
+    },
+  },
   apollo: {
     persons: gqlPersons,
     absenceReasons: gqlAbsenceReasons,

aleksis/apps/kolego/schema/absence.py

@@ -104,7 +104,8 @@ class AbsenceBatchPatchMutation(PermissionBatchPatchMixin, DjangoBatchPatchMutat
 
     @classmethod
     def before_save(cls, root, info, input, obj):
-        obj.timezone = ZoneInfo(settings.TIME_ZONE) # FIXME Use TZ provided by client
+        for absence in obj:
+            absence.timezone = ZoneInfo(settings.TIME_ZONE) # FIXME Use TZ provided by client
         return obj