different layout for sign_in action in devise

Another way to apply custom layout for an action is as following.

According to How To: Create custom layouts "You can also set the layout for specific Devise controllers using a callback in config/environment.rb (rails 2) or config/application.rb (rails 3). This needs to be done in a to_prepare callback because it's executed once in production and before each request in development."

config.to_prepare do    Devise::SessionsController.layout "devise"    Devise::RegistrationsController.layout proc{ |controller| user_signed_in? ? "application"   : "devise" }    Devise::ConfirmationsController.layout "devise"    Devise::UnlocksController.layout "devise"                Devise::PasswordsController.layout "devise"        end

Usually a layout distinction is made between pages behind login and pages which do not require authentication, so the above approach works most of the time. But I also experimented with using action_name helper to set a layout for a particular action and it worked like charm:

config.to_prepare do    Devise::SessionsController.layout proc{ |controller| action_name == 'new' ? "devise"   : "application" }end

I think this is the better and built in way to change the layout based on devise controller/action instead of creating a helper in ApplicationController.

I just created app/views/layouts/devise/sessions.html.erb and put my layout in there.

I figured it out, but I'll keep this question here in case other people are curious.

It was a stupid mistake. The fact is sign_in is the path, not the action. Looking at the relevant source, I can see that the required action is new, i.e., creating a new Devise Session. Changing my above code's conditional to:

if devise_controller? && resource_name == :user && action_name == 'new'

Works beautifully.

Hope that helps someone out there.