bootstrap 3 horizontal form rails builder

bootstrap_horizontal_form.rb

class BootstrapHorizontalForm < ActionView::Helpers::FormBuilder

  def text_field(method, options={})
    width = options[:width] || 10
    t = @template
    t.content_tag(:div, :class => "form-group#{' has-error' unless @object.errors[method].blank?}") {
      t.concat(t.label(@object_name, method, class: 'col-lg-2 control-label'))
      t.concat(t.content_tag(:div, class: "col-lg-#{width}") {
        t.concat(t.text_field(@object_name, method, options.merge(class: 'form-control')))
        if @object.errors[method].present?
          t.concat(t.content_tag(:span, @object.errors[method].join(', '), :class => 'help-block'))
        end
      })
    }
  end

  def check_box(method, options={})
    t = @template
    t.content_tag(:div, class: "form-group #{' has-error' unless @object.errors[method].blank?}") {
      t.concat(t.content_tag(:div, class: 'col-lg-10 col-offset-2') {
        t.concat(t.content_tag(:div, class: 'checkbox') {
          t.concat(t.check_box(@object_name, method))
          t.concat(t.label(@object_name, method))
        })
      })
    }
  end

  def submit(value=nil, options={})
    @template.content_tag(:div, class: 'col-lg-10 col-offset-2') {
      super(value, options.merge(class: 'btn btn-primary'))
    }
  end

end