Allow to change slug in admin sessions

src/pretix/control/forms/event.py

@@ -202,17 +202,22 @@ class EventMetaValueForm(forms.ModelForm):
 
 
 class EventUpdateForm(I18nModelForm):
-    def clean_slug(self):
-        return self.instance.slug
 
     def __init__(self, *args, **kwargs):
+        self.change_slug = kwargs.pop('change_slug', False)
         super().__init__(*args, **kwargs)
-        self.fields['slug'].widget.attrs['readonly'] = 'readonly'
+        if not self.change_slug:
+            self.fields['slug'].widget.attrs['readonly'] = 'readonly'
         self.fields['location'].widget.attrs['rows'] = '3'
         self.fields['location'].widget.attrs['placeholder'] = _(
             'Sample Conference Center\nHeidelberg, Germany'
         )
 
+    def clean_slug(self):
+        if self.change_slug:
+            return self.cleaned_data['slug']
+        return self.instance.slug
+
     class Meta:
         model = Event
         localized_fields = '__all__'

src/pretix/control/forms/organizer.py

@@ -35,6 +35,7 @@ class OrganizerUpdateForm(OrganizerForm):
 
     def __init__(self, *args, **kwargs):
         self.domain = kwargs.pop('domain', False)
+        self.change_slug = kwargs.pop('change_slug', False)
         kwargs.setdefault('initial', {})
         self.instance = kwargs['instance']
         if self.domain and self.instance:
@@ -43,7 +44,8 @@ class OrganizerUpdateForm(OrganizerForm):
                 kwargs['initial'].setdefault('domain', initial_domain.domainname)
 
         super().__init__(*args, **kwargs)
-        self.fields['slug'].widget.attrs['readonly'] = 'readonly'
+        if not self.change_slug:
+            self.fields['slug'].widget.attrs['readonly'] = 'readonly'
         if self.domain:
             self.fields['domain'] = forms.CharField(
                 max_length=255,
@@ -53,6 +55,8 @@ class OrganizerUpdateForm(OrganizerForm):
             )
 
     def clean_slug(self):
+        if self.change_slug:
+            return self.cleaned_data['slug']
         return self.instance.slug
 
     def save(self, commit=True):

src/pretix/control/views/event.py

@@ -153,6 +153,12 @@ class EventUpdate(EventSettingsViewMixin, EventPermissionRequiredMixin, MetaData
             'event': self.object.slug,
         })
 
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        if self.request.user.has_active_staff_session(self.request.session.session_key):
+            kwargs['change_slug'] = True
+        return kwargs
+
     def post(self, request, *args, **kwargs):
         form = self.get_form()
         if form.is_valid() and self.sform.is_valid() and all([f.is_valid() for f in self.meta_forms]):

src/pretix/control/views/organizer.py

@@ -225,6 +225,7 @@ class OrganizerUpdate(OrganizerPermissionRequiredMixin, UpdateView):
         kwargs = super().get_form_kwargs()
         if self.request.user.has_active_staff_session(self.request.session.session_key):
             kwargs['domain'] = True
+            kwargs['change_slug'] = True
         return kwargs
 
     def get_success_url(self) -> str: