Trouble with nested content_tag in rails 3

gistfile1.rb

In my app I made a helper method to help me render form rows and DRY up my code.

def form_row(form, input_type, symbol)
  # Need to generate HTML like this
  # <div class="clearfix">
  #   <%= f.label :first_name %>
  #   <div class="input">
  #     <%= f.text_field :first_name, html_options = {:class => 'xlarge'} %>
  #   </div>
  # </div><!-- /clearfix -->

  # I tried to write the method like below but never got it to work right.
  # got the sense that content_tag only enclosed the final line in its enclosure.
  # The below code for example runs but the form.label(symbol) isn't included in the output.
  # I tried adding a '+' ala the SO suggestion but it only gave me syntax errors.
  # Any suggestions?

  # Found these questions but didn't find a working answer (or maybe I'm misunderstanding something)

  # http://stackoverflow.com/questions/4205613/rails-nested-content-tag
  # http://robots.thoughtbot.com/post/9123352587/nesting-content-tag-in-rails-3

  content_tag 'div', {:class => 'clearfix'} do 
    output = form.label(symbol) # doesn't render
    output += content_tag 'div', {:class => 'input'} do 
      form.send(input_type, symbol, html_options = {:class => 'xlarge'})
    end
    output
  end
end

Thanks for your suggestions.

Wow, this is pretty incredible ... Are you looking to do this for the twitter bootstrap forms? That's how I got here, and I have the exact same issue. I implemented your solution and it works for me!. This is my exact code:

  def form_row(f, field, input_type='text_field')
    content_tag :div, :class => 'clearfix' do
      content = f.label(field)
      content += content_tag :div, :class => 'input' do
        f.send(input_type, field)
      end
      content
    end
  end

looks the same to me, no?