#224 Controllers in Rails 3

config.filter_parameters += [:password]

# products_controller
redirect_to @product, :notice => "Successfully created product."
redirect_to [:edit, @product]
redirect_to [@category, :edit, @product]

cookies.permanent[:last_product_id] = @product.id

# in class
respond_to :html, :xml

# in action
respond_with(@products)
respond_with(@product, :location => products_url)
respond_with(@product, :responder => MyResponder)
respond_with(@product) do |format|
  format.xml { render :text => "I'm XML!" }
end