来自 rake 任务的 render_to_string [英] render_to_string from a rake task

问题描述

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

I want to use a Rake task to cache my sitemap so that requests for sitemap.xml won't take forever. Here's what I have so far:

  @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，出现错误:

But when I try to run this, I get an error:

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

如何在 Rake 中将模板渲染为字符串?

How can I render a template to a string from within Rake?

推荐答案

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完成此工作

Note that I converted my template to a partial to make this work

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