#317

backend/app/controllers/tags_controller.rb

@@ -238,21 +238,26 @@ class TagsController < ApplicationController
       TagVersioning.ensure_snapshot!(tag, created_by_user: current_user)
 
       old_name = tag.name
+      name_changed = name != old_name
+      wiki_page = tag.tag_name.wiki_page if name_changed
 
       tag.update!(category:)
       tag.tag_name.update!(name:)
 
-      alias_names << old_name if name != old_name
+      alias_names << old_name if name_changed
       alias_names.delete(name)
 
       update_aliases!(tag, alias_names)
       update_parent_tags!(tag, parent_names)
 
       tag.reload
-      record_tag_version!(tag,
-                          event_type: :update,
-                          created_by_user: current_user,
-                          name_changed: name.present? && name != old_name)
+
+      record_tag_version!(
+          tag,
+          event_type: :update,
+          created_by_user: current_user,
+          name_changed:,
+          wiki_page:)
     end
 
     render json: TagRepr.base(tag.reload)
@@ -277,6 +282,7 @@ class TagsController < ApplicationController
 
       old_name = tag.name
       name_changed = name.present? && name != old_name
+      wiki_page = tag.tag_name.wiki_page if name_changed
 
       tag.tag_name.update!(name:) if name.present?
       tag.update!(category:) if category.present?
@@ -287,7 +293,8 @@ class TagsController < ApplicationController
           tag,
           event_type: :update,
           created_by_user: current_user,
-          name_changed:)
+          name_changed:,
+          wiki_page:)
     end
 
     render json: TagRepr.base(tag.reload)
@@ -309,7 +316,7 @@ class TagsController < ApplicationController
         material: material.as_json&.merge(file:, content_type:))
   end
 
-  def record_tag_version! tag, event_type:, created_by_user:, name_changed: false
+  def record_tag_version! tag, event_type:, created_by_user:, name_changed: false, wiki_page: nil
     if tag.nico?
       NicoTagVersionRecorder.record!(tag:, event_type:, created_by_user:)
       return
@@ -319,10 +326,13 @@ class TagsController < ApplicationController
 
     return unless name_changed
 
-    wiki_page = tag.tag_name.wiki_page
+    wiki_page ||= tag.tag_name.wiki_page
     return unless wiki_page&.wiki_versions&.exists?
 
-    WikiVersionRecorder.record!(page: wiki_page, event_type: :update, created_by_user:)
+    WikiVersionRecorder.record!(
+        page: wiki_page,
+        event_type: :update,
+        created_by_user:)
   end
 
   def update_aliases! tag, alias_names