細部の修正

backend/app/controllers/wiki_pages_controller.rb

@@ -1,4 +1,10 @@
 class WikiPagesController < ApplicationController
+  def index
+    wiki_pages = WikiPage.all
+
+    render json: wiki_pages
+  end
+
   def show
     render_wiki_page_or_404 WikiPage.find(params[:id])
   end
@@ -14,7 +20,7 @@ class WikiPagesController < ApplicationController
     return head :bad_request if id.blank? || from.blank?
 
     wiki_page_from = WikiPage.find(id)
-    wiki_page_to = wiki_page_from.clone
+    wiki_page_to = WikiPage.find(id)
     wiki_page_from.sha = from
     wiki_page_to.sha = to