BootstrapFormBuilder

bootstrap_form_builder.rb

class BootstrapFormBuilder < ActionView::Helpers::FormBuilder
  helpers = field_helpers +
              %w{date_select datetime_select time_select} +
              %w{collection_select select country_select time_zone_select} -
              %w{hidden_field label fields_for} # Don't decorate these
  helpers.each do |name|
    define_method(name) do |field, *args|
      options_index = ActionView::Helpers::FormBuilder.instance_method(name.to_sym).parameters.index([:opt,:options])
      if options_index.nil?
        options = args.last.is_a?(Hash) ? args.pop : {} # pretty sure this shouldn't happen
      else
        options = args[options_index - 1] # -1 to account for the method name argument
      end
      label = label(field, options[:label], :class => options[:label_class])
      @template.content_tag(:div, :class => 'clearfix') do
        @template.concat(label)
        @template.concat(@template.content_tag(:div, :class => 'input') { @template.concat(super(field, *args)) })
      end
    end
  end
end

ActionView::Base.default_form_builder = BootstrapFormBuilder

bootstrap_form_for_helper.rb

def bootstrap_form_for(object, options = {}, &block)
  options[:builder] = BootstrapFormBuilder
  form_for(object, options, &block)
end

class BootstrapFormBuilder < ActionView::Helpers::FormBuilder
['text_field', 'text_area'].each do |helper|
define_method helper do |field, *args|
options = args.detect{ |a| a.is_a?(Hash) } || {}

if @object.errors[field].any?
'

'.html_safe +
(self.label field) +
'

'.html_safe +
(super field, *args) +
''.html_safe + @object.errors[field].join('; ') + ''.html_safe +
'

'.html_safe
else
'

'.html_safe +
(self.label field) +
'

'.html_safe +
(super field, *args) +
'

'.html_safe
end
end
end
end