#19 Wiki 新規作成完成

backend/app/models/wiki_page.rb

@@ -13,17 +13,17 @@ class WikiPage < ApplicationRecord
     page&.raw_data
   end
 
-  def body= content, user:
+  def set_body content, user:
     page = wiki.page("#{ id }.md")
 
     commit_info = { message:  "Update #{ title }",
-                    name:     user.id,
+                    name:     user.id.to_s,
                     email:    'dummy@example.com' }
 
     if page
       page.update(content, commit: commit_info)
     else
-      wiki.write_page("#{ id }.md", :markdown, content, commit_info)
+      wiki.write_page(id.to_s, :markdown, content, commit_info)
     end
   end