XmlToForm gem enables you to upload any xml file and it will convert it to nested Rails Form with the help of <fieldset> and <legend> tags, then you can update that file and you will get an updated.xml file.
Add this line to your application’s Gemfile:
gem 'xml_to_form'
And then execute:
$ bundle install
Copy the migration file:
$ rake xml_to_form:install:migrations
Migrate it in db:
$ rake db:migrate
To use this gem you just need to mount it in your route file config/routes.rb
mount XmlToForm::Engine => '/xml_handler'
Then hit the url localhost:3000/xml_handler
then you will see a file upload button to upload a xml file after uploading a file you will see nested rails form for updating xml file whatever value you will update it will update the xml file and will create an updated.xml file.