ActiveAdmin nested DropDown Menu

Question

The ActiveAdmin Docs mention the following Syntax to nest submenus:

# https://activeadmin.info/2-resource-customization.html#customize-the-menu

ActiveAdmin.register Post do
  menu parent: ["Admin", "Blog"]
end

However I'm getting a TypeError:

Array isn't supported as a Menu ID

Any clue?

user_153279 · Answer

This feature was only just added so you probably need to use master if you want it.