ruby-on-rails – Rails缓存：使用清扫器进行需要参数的操作

控制器：

class PostsController < ApplicationController
  load_and_authorize_resource
  cache_sweeper :post_sweeper,:only => [:create,:update,:destroy]
  caches_page :index
  caches_page :show
  caches_action :edit,:new

  # This refreshes cache correctly
  def index
    @posts = Post.all
  end

#这会创建缓存,但不会刷新(永远).如果我将expire_page命令直接放入操作(而不是清理程序),它可以正常工作

def update
    @post = Post.find(params[:id])
    respond_to do |format|
      if @post.update_attributes(params[:post])
        flash[:notice] = t(:post_updated)
        format.html { redirect_to(@post) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @post.errors,:status => :unprocessable_entity }
      end
    end
  end

扫地机：

class PostSweeper < ActionController::Caching::Sweeper
  observe Post

  def after_create(record)
    expire_cache_for_index(record)
  end

  def after_update(record)
    expire_cache_for_index(record)
    expire_cache_for_post(record)
    expire_cache_for_edit(record)
  end

  def after_destroy(record)
    expire_cache_for_index(record)
    expire_cache_for_post(record)
    expire_cache_for_edit(record)
  end

  private
  def expire_cache_for_index(record)
    expire_page :controller => 'posts',:action => 'index'
  end

  def expire_cache_for_post(record)
    expire_page :controller => 'posts',:action => 'show',:id => record.id
  end

  def expire_case_for_edit(record)
    expire_action :controller => 'posts',:action => 'edit',:id => record.id
  end

end