send xml file on get request ruby

I want to send an XML file when get request is made

here is my my xml file

<forms>
<form url="http://ift.tt/1vB2DLG">Cascading Select Form</form>
<form url="http://ift.tt/1whxtnF">Widgets</form>
</forms>

this is my url

http://localhost:3000/forms/formlist

here is my ruby controller to send a xml

respond_to :xml
def formlist
   respond_to do |format|
     format.xml {//what should I write here to send formlist.xml}
   end
end

here is route.rb

get 'forms/formlist' => 'forms#formlist'

but its not sending xml file giving error code something 422

Please help me

Thanks in advance.