#19 トップバーと新規作成ちょっとだけ

backend/app/models/wiki_page.rb

@@ -2,33 +2,36 @@ require 'gollum-lib'
 
 
 class WikiPage < ApplicationRecord
-  WIKI_PATH = Rails.root.join('wiki').to_s
-
   belongs_to :tag, optional: true
   belongs_to :created_user, class_name: 'User', foreign_key: 'created_user_id'
   belongs_to :updated_user, class_name: 'User', foreign_key: 'updated_user_id'
 
   validates :title, presence: true, length: { maximum: 255 }, uniqueness: true
 
-  def markdown
-    wiki = Gollum::Wiki.new(WIKI_PATH)
-    page = wiki.page(title)
+  def body
+    page = wiki.page("#{ id }.md")
     page&.raw_data
   end
 
-  def markdown= content
-    wiki = Gollum::Wiki.new(WIKI_PATH)
-
-    page = wiki.page(title)
+  def body= content, user:
+    page = wiki.page("#{ id }.md")
 
     commit_info = { message:  "Update #{ title }",
-                    name:     current_user.id,
+                    name:     user.id,
                     email:    'dummy@example.com' }
 
     if page
       page.update(content, commit: commit_info)
     else
-      wiki.write_page(title, :markdown, content, commit_info)
+      wiki.write_page("#{ id }.md", :markdown, content, commit_info)
     end
   end
+
+  private
+
+  WIKI_PATH = Rails.root.join('wiki').to_s
+
+  def wiki
+    @wiki ||= Gollum::Wiki.new(WIKI_PATH)
+  end
 end