twitter_bootstrap_form_builder.rb

class TwitterBootstrapFormBuilder < ActionView::Helpers::FormBuilder
  delegate :capture, :content_tag, :tag, :to => :@template
  
  %w[text_field text_area password_field collection_select].each do |method_name|
    define_method(method_name) do |name, *args|
      errors = object.errors[name].any? ? " error" : ""
      error_msg = object.errors[name].any? ? content_tag(:span, object.errors[name].join(","), :class => "help-inline") : ""
    
      content_tag :div, :class => "clearfix#{errors}" do
        field_label(name, *args) + content_tag(:div, :class => "input#{errors}") do
          super(name, *args) + " " + error_msg
        end
      end
    end
  end

  def check_box(name, *args)
    content_tag :div, :class => "clearfix" do
      content_tag(:div, class => "input") do
        content_tag(:ul, :class => "inputs-list") do
          content_tag(:li) do
            content_tag(:label) do
              super(name, *args) + content_tag(:span) do
                field_label(name, *args)
              end
            end
          end
        end
      end
    end
  end
  
  
  def actions(*args, &block)
    options = args.extract_options!
    content = block_given? ? capture(&block) : ""
    content_tag(:div, content, :class => options[:class])
  end
  
  
  def submit(*args)
    super(*args, :class => "btn primary")
  end
  
  private

  def field_label(name, *args)
    options = args.extract_options!
    label(name, options[:label])
  end
  
  def objectify_options(options)
    super.except(:label)
  end
end

module TwitterBootstrapHelper
  def twitter_bootstrap_form_for(object, options = {}, &block)
    options[:builder] = TwitterBootstrapFormBuilder
    form_for(object, options, &block)
  end
end