Question

I want to show my users the xml that gets generated for a certain action.

Consider that I have a PostController and the following views:

• /views/posts/show.xml.builder
• /views/posts/preview_xml.html.erb

In my preview_xml action I want to be able to parse the show.xml.builder just like if it was called directly and output the result in the html.

I know with ERB it is possible with:

ERB.new(File.read(path_to_file)).result(bindings)

But I have not found a working equivalent for Builder

Has anyone else run into this? Ideas to solve or work around?

Thanks!

Answer 1

Figured it out by reading Rails Template engine:

my preview_xml method looks like the following:

class PostsController < ApplicationController
  include :Helpers::TagHelper

  def preview_xml
    @post = Post.find(params[:id])
    xml = ::Builder::XmlMarkup.new(indent: 2)
    builder_file = File.read(::Rails.root.to_s + '/app/views/posts/show.xml.builder')
    require 'builder'
    instance_eval builder_file
    @tag_xml = xml.target!
  end

end