来自rake任务的render_to_string

Question

我想使用Rake任务来缓存我的站点地图,以便请求sitemap.xml不会永远.这是我到目前为止所拥有的:

  @posts = Post.all

  sitemap = render_to_string :template => 'sitemap/sitemap', :locals => {:posts => @posts}, :layout => false
  Rails.cache.write('sitemap', sitemap)

但是当我尝试运行它时,我收到一个错误:

undefined local variable or method `headers' for #<Object:0x100177298>

如何从Rake中将模板渲染为字符串？

Answer 1

我是这样做的:

  av = ActionView::Base.new(Rails::Configuration.new.view_path)
  av.class_eval do
    include ApplicationHelper
  end

  include ActionController::UrlWriter
  default_url_options[:host] = 'mysite.com'

  posts = Post.all

  sitemap = av.render 'sitemap/sitemap', :posts => posts
  Rails.cache.write('sitemap', sitemap)

请注意,我将模板转换为部分模板以使其工作