Fix the Locale create/edit/delete success messages

wagtail_localize/locales/views.py

@@ -91,7 +91,6 @@ def get_context_data(self):
 
 class CreateView(generic.CreateView):
     page_title = gettext_lazy("Add locale")
-    success_message = gettext_lazy("Locale '{0}' created.")
     template_name = "wagtaillocales/create.html"
 
     def get_components(self):
@@ -112,6 +111,10 @@ def post(self, request, *args, **kwargs):
         else:
             return self.form_invalid(form)
 
+    @property
+    def success_message(self):
+        return gettext_lazy("Locale '{0}' created.").format(str(self.object))
+
     @transaction.atomic
     def form_valid(self, form):
         response = super().form_valid(form)
@@ -125,7 +128,6 @@ def get_context_data(self, **kwargs):
 
 
 class EditView(generic.EditView):
-    success_message = gettext_lazy("Locale '{0}' updated.")
     error_message = gettext_lazy("The locale could not be saved due to errors.")
     delete_item_label = gettext_lazy("Delete locale")
     context_object_name = "locale"
@@ -152,6 +154,10 @@ def post(self, request, *args, **kwargs):
         else:
             return self.form_invalid(form)
 
+    @property
+    def success_message(self):
+        return gettext_lazy("Locale '{0}' updated.").format(str(self.object))
+
     @transaction.atomic
     def form_valid(self, form):
         response = super().form_valid(form)
@@ -165,7 +171,6 @@ def get_context_data(self, **kwargs):
 
 
 class DeleteView(generic.DeleteView):
-    success_message = gettext_lazy("Locale '{0}' deleted.")
     cannot_delete_message = gettext_lazy(
         "This locale cannot be deleted because there are pages and/or other objects using it."
     )
@@ -189,6 +194,10 @@ def form_valid(self, form):
             messages.error(self.request, self.cannot_delete_message)
             return super().get(self.request)
 
+    @property
+    def success_message(self):
+        return gettext_lazy("Locale '{0}' deleted.").format(str(self.object))
+
 
 class LocaleViewSet(ModelViewSet):
     icon = "site"