不能删除帖子到问题

app/controllers/memos_controller.rb

@@ -148,7 +148,8 @@ class MemosController < ApplicationController
 
   def find_memo
     return unless find_forum
-    @memo = @forum.memos.find(params[:id])
+    #@memo = @forum.memos.find(params[:id])
+    @memo = Memo.find(params[:id])
   rescue ActiveRecord::RecordNotFound
     render_404
     nil