Auto-labelling formbuilder, use with :builder => LabellingFormBuilder

application_helper.rb

module ApplicationHelper                                                              

  def labelled_form_for(name, object, options, &proc)
    form_for(name, object, options.merge(:builder => LabellingFormBuilder), &proc)
  end

  def multipart_form_for(name, object, options, &proc)
    html_options = options.delete(:html) || {}
    html_options.merge!(:multipart => true)
    form_for(name, object, options.merge(:html => html_options), &proc)
  end

  def labelled_multipart_form_for(name, object, options, &proc)
    multipart_form_for(name, object, options.merge(:builder => LabellingFormBuilder), &proc)
  end

end

labelling_form_builder.rb

class LabellingFormBuilder < ActionView::Helpers::FormBuilder                                                               

  [:text_field, :password_field, :time_select, :date_select, :datetime_select, :file_field, :text_area].each do |selector|
    src = <<-SRC                                                                                                          
      def #{selector.to_s}(method, options = {})                                                                          
        html = super(method, options)                                                                                     
        label = options.delete(:label) if options.is_a? Hash                                                              
        label ||= method.to_s.humanize                                                                                    
        <<-HTML                                                                                                           
          <label for="#\{object_name}_#\{method.to_s}">#\{label.to_s}</label><br/>
          #\{html}
        HTML
      end
    SRC
    class_eval src, __FILE__, __LINE__
  end

  [:check_box].each do |selector|
    src = <<-SRC
      def #{selector.to_s}(method, options = {}, checked_value = "1", unchecked_value = "0")
        html = super(method, options, checked_value, unchecked_value)
        label = options.delete(:label) if options.is_a? Hash
        label ||= method.to_s.humanize + "?"
        <<-HTML
          <label for="#\{object_name}_#\{method.to_s}">#\{label.to_s}</label><br/>
          #\{html}
        HTML
      end
    SRC
    class_eval src, __FILE__, __LINE__
  end

  [:select, :country_select].each do |selector|
    src = <<-SRC
      def #{selector.to_s}(method, choices, options = {}, html_options = {})
        html = super(method, choices, options, html_options)
        label = options.delete(:label) if options.is_a? Hash
        label ||= method.to_s.humanize
        <<-HTML
          <label for="#\{object_name}_#\{method.to_s}">#\{label.to_s}</label><br/>
          #\{html}
        HTML
      end
    SRC
    class_eval src, __FILE__, __LINE__
  end

end