to use Refinery with your custom devise configuration in Rails 3.1

refinery_patch.rb

module RefineryPatch

  def self.included(base)
    base.send :helper_method, 
              :current_refinery_user, 
              :refinery_user_signed_in?, 
              :refinery_user? if base.respond_to? :helper_method
  end

  def current_refinery_user
    current_user
  end

  def refinery_user_signed_in?
    user_signed_in?
  end
    
  def refinery_user?
    refinery_user_signed_in? && current_refinery_user.has_role?(:refinery)
  end
  
  def authenticate_refinery_user!
    authenticate_user!
  end

  def store_location
    session[:return_to] = request.fullpath
  end
  
  def redirect_back_or_default(default)
    redirect_to(session[:return_to] || default)
    session[:return_to] = nil
  end
end

restrict_refinery_to_refinery_users.rb

module RestrictRefineryToRefineryUsers

  def restrict_refinery_to_refinery_users
    return unless !current_user.try(:has_role?, "Refinery") #current_user.try(:roles).try(:empty?) is another possibility
    redirect_to main_app.root_path #this user is not a refinery user because they have no refinery roles.
    return false
  end

end