帖子回复数量超过一页，首页动态点击过去无法跳转到相应页面定位，锚点失效

app/controllers/memos_controller.rb

@@ -60,6 +60,12 @@ class MemosController < ApplicationController
     @memo.update_attribute(:viewed_count, @memo.viewed_count.to_i + 1)
 
     page = params[:page]
+    if params[:r] && page.nil?
+      offset = @memo.children.where("#{Memo.table_name}.id < ?", params[:r].to_i).count
+      page = 1 + offset / pre_count
+    else
+      
+    end
     @reply_count = @memo.children.count
     @reply_pages = Paginator.new @reply_count, pre_count, page
     @replies = @memo.children.

app/models/memo.rb

@@ -21,7 +21,7 @@ class Memo < ActiveRecord::Base
 				  :description => :content,
 				  :author => :author,
 				  :type => Proc.new {|o| o.parent_id.nil? ? 'Memo' : 'Reply'},
-				  :url => Proc.new {|o| {:controller => 'memos', :action => 'show', :forum_id => o.forum_id}.merge(o.parent_id.nil? ? {:id => o.id} : {:id => o.parent_id, :anchor => "reply-#{o.id}"})}
+				  :url => Proc.new {|o| {:controller => 'memos', :action => 'show', :forum_id => o.forum_id}.merge(o.parent_id.nil? ? {:id => o.id} : {:id => o.parent_id, :r => o.id, :anchor => "reply-#{o.id}"})}
 	acts_as_activity_provider :author_key => :author_id,
 							  :func => 'memos',
 							  :timestamp => 'created_at'