Web 上有许多示例(例如http://techoctave.com/c7/posts/32-create-an-rss-feed-in-rails)展示了如何使用 Builder 制作漂亮的 RSS 提要。规范模板是这样的:
xml.instruct! :xml, :version => "1.0"
xml.rss :version => "2.0" do
xml.channel do
xml.title "Your Blog Title"
xml.description "A blog about software and chocolate"
xml.link posts_url
for post in @posts
xml.item do
xml.title post.title
xml.description post.content
xml.pubDate post.posted_at.to_s(:rfc822)
xml.link post_url(post)
xml.guid post_url(post)
end
end
end
这在 Rails 3.0.7 中运行良好。在 Rails 3.1 Edge 中,每个命令似乎都会产生...
Rendered home/index.rss.builder (25.2ms)
Completed 500 Internal Server Error in 875ms
ActionView::Template::Error (wrong number of arguments (1 for 0)):
1: xml.instruct!(:xml, :encoding => "UTF-8")
2:
3: xml.rss :version => "2.0" do
4: xml.channel do
app/views/home/index.rss.builder:1:in `_app_views_home_index_rss_builder___2123990471_2215695900'
app/controllers/home_controller.rb:17:in `index'
app/controllers/home_controller.rb:11:in `index'