Rails 3.1和静态页面

Question

我只是在将大型应用程序从Rails 3升级到Rails 3.1，并在我实施页面控制器的情况下遇到了问题：

  when templates doesnt exist
    should render the 404 page (FAILED - 1)

Failures:

  1) PagesController automatic paths when templates doesnt exist should render the 404 page
     Failure/Error: get 'base_page_processor', :base_page => 'something_that_doesnt_exist'
     NoMethodError:
       undefined method `map' for "pages":String
     # ./app/controllers/pages_controller.rb:5:in `base_page_processor'
     # ./spec/controllers/pages_controller_spec.rb:37:in `block (3 levels) in <top (required)>'

Finished in 0.10557 seconds
4 examples, 1 failure

Failed examples:

rspec ./spec/controllers/pages_controller_spec.rb:36 # PagesController automatic paths when templates doesnt exist should render the 404 page

这确实在Rails 3.0中起作用。使用Template_Exists方法必须更改一些东西。这是控制器：

class PagesController < ApplicationController
  def base_page_processor
    view_prefix = "pages"

    if params[:base_page].present? && template_exists?(params[:base_page], view_prefix)
      render "#{view_prefix}/#{params[:base_page]}"
    else
      #TODO : Notify missing url via email error or error notification service
      render '/public/404.html', :status => 404
    end
  end
end

解决方案代码：

class PagesController < ApplicationController
  def base_page_processor
    view_prefix = ["pages"]

    if params[:base_page].present? && template_exists?(params[:base_page], view_prefix)
      render "#{view_prefix[0]}/#{params[:base_page]}"
    else
      #TODO : Notify missing url via email error or error notification service
      render '/errors/404.html', :status => 404
    end
  end
end

我还注意到它没有呈现错误视图（即：/public/404.html），因此我创建了一个目录应用程序/视图/错误，并将所有错误静态页面放入其中，然后立即渲染它们。有用。

谢谢安德鲁。

Answer 1

这 template_exists 方法参数表明第二个参数前缀应为数组。通常，轨道方法通过将某物转换为阵列（如果没有）来接受两者，因此这有点不寻常。

exists?(name, prefixes = [], partial = false, keys = [])

此方法也被称为template_exists？

# File actionpack/lib/action_view/lookup_context.rb, line 93
def exists?(name, prefixes = [], partial = false, keys = [])
  @view_paths.exists?(*args_for_lookup(name, prefixes, partial, keys))
end

所以制作 view_prefix = ["pages"] 应该管用？ （并相应地修改其余的字符串插值）