Question

I have many levels of a nested hash like:

 { :foo => 'bar', :foo1 => { :foo2 => 'bar2', :foo3 => 'bar3', :foo4 => { :foo5 => 'bar5' }}}

How can I convert them into an XML like this?:

<foo>bar</foo>
<foo1>
    <foo2>bar2</foo2>
    <foo3>bar3</foo3>
    <foo4>
      <foo5>bar5</foo5>
    </foo4>
</foo1>

I tried the xml.send method, but it converts the above nested hash to:

<foo1 foo3="bar3" foo4="foo5bar5" foo2="bar2"/>
<foo>bar</foo>

Answer 1

How about this?

class Hash
  def to_xml
    map do |k, v|
      text = Hash === v ? v.to_xml : v
      "<%s>%s</%s>" % [k, text, k]
    end.join
  end
end

h.to_xml
#=> "<foo>bar</foo><foo1><foo2>bar2</foo2><foo3>bar3</foo3><foo4><foo5>bar5</foo5></foo4></foo1>"