application.html.haml

	%body
		.container
			- flash.each do |key, value|
				= content_tag(:div, value, :class => "flash #{key}")
			= yield
			= debug(params) if Rails.env.development?

new.html.haml

%h1 Login
= form_for :session, :url => sessions_path  do |f|
	.field
		= f.label :username
		%br
		= f.text_field :username
	.field
		= f.label :password
		%br
		= f.password_field :password
	.actions
		= f.submit "Sign in"

sessions_helper.rb

  def deny_access
    store_location
    redirect_to login_path, :flash => { :error => "Oops! You'll need to login before you can access that page." }
  end