Check if a layout exists in Rails?

Question

Is there a standard way to check if a view layout exists from within a Controller in Rails? I'm trying to allow the user to determine the layout, but it needs to exist first.

Answer 1

You can use template_exists? which is an alias for exists?

For example: template_exists?("layout_name", "layouts")

Answer 2

There is no standard public way as far as I know. You could use a rudimentary call like this:

layouts = Dir['app/views/layouts/*'].map {|f|
  File.basename(f, '.html.erb')  # returns 'layout' for 'layout.html.erb'
}