Move method once again

src/pretix/control/views/event.py

@@ -99,7 +99,21 @@ class MetaDataEditorMixin:
                 f.instance.delete()
 
 
-class EventUpdate(EventSettingsViewMixin, EventPermissionRequiredMixin, MetaDataEditorMixin, UpdateView):
+class DecoupleMixin:
+
+    def _save_decoupled(self, form):
+        # Save fields that are currently only set via the organizer but should be decoupled
+        fields = set()
+        for f in self.request.POST.getlist("decouple"):
+            fields |= set(f.split(","))
+        for f in fields:
+            if f not in form.fields:
+                continue
+            if f not in self.request.event.settings._cache():
+                self.request.event.settings.set(f, self.request.event.settings.get(f))
+
+
+class EventUpdate(DecoupleMixin, EventSettingsViewMixin, EventPermissionRequiredMixin, MetaDataEditorMixin, UpdateView):
     model = Event
     form_class = EventUpdateForm
     template_name = 'pretixcontrol/event/settings.html'
@@ -327,7 +341,7 @@ class PaymentProviderSettings(EventSettingsViewMixin, EventPermissionRequiredMix
             return self.get(request)
 
 
-class EventSettingsFormView(EventPermissionRequiredMixin, FormView):
+class EventSettingsFormView(EventPermissionRequiredMixin, DecoupleMixin, FormView):
     model = Event
     permission = 'can_change_event_settings'
 
@@ -343,17 +357,6 @@ class EventSettingsFormView(EventPermissionRequiredMixin, FormView):
     def form_success(self):
         pass
 
-    def _save_decoupled(self, form):
-        # Save fields that are currently only set via the organizer but should be decoupled
-        fields = set()
-        for f in self.request.POST.getlist("decouple"):
-            fields |= set(f.split(","))
-        for f in fields:
-            if f not in form.fields:
-                continue
-            if f not in self.request.event.settings._cache():
-                self.request.event.settings.set(f, self.request.event.settings.get(f))
-
     @transaction.atomic
     def post(self, request, *args, **kwargs):
         form = self.get_form()