Merge remote-tracking branch 'origin/main' into feature/169

backend/app/controllers/wiki_pages_controller.rb

@@ -13,6 +13,22 @@ class WikiPagesController < ApplicationController
     render_wiki_page_or_404 WikiPage.find_by(title: params[:title])
   end
 
+  def exists
+    if WikiPage.exists?(params[:id])
+      head :no_content
+    else
+      head :not_found
+    end
+  end
+
+  def exists_by_title
+    if WikiPage.exists?(title: params[:title])
+      head :no_content
+    else
+      head :not_found
+    end
+  end
+
   def diff
     id = params[:id]
     from = params[:from]

backend/app/models/nico_tag_relation.rb

@@ -6,6 +6,7 @@ class NicoTagRelation < ApplicationRecord
   validates :tag_id, presence: true
 
   validate :nico_tag_must_be_nico
+  validate :tag_mustnt_be_nico
 
   private