Building XML under Rails 5.

xml_builder.rb

require 'builder'

# See more about syntax on
# http://api.rubyonrails.org/classes/ActionView/Base.html
# https://github.com/jimweirich/builder
# http://builder.rubyforge.org/

xml = +""
builder = Builder::XmlMarkup.new(target: xml, indent: 2)
builder.rootelementname { |x|
  x.properties {
    x.property(name: "some-root-element-property", value: "some value 1")
    x.property(name: "some-other-root-element-property", value: "some value 2")
  }
  x.subelement(someprop: "somevalue") {
    x.tag!("tag-with-dashes", prop: "value X")
  }
}

puts xml