To get Will_Paginate and ActiveAdmin to play nice and avoid this error:
[cc lang=”ruby”]
undefined method `per’ for #
[/cc]

In your config/initializers, add this:
[cc lang=”ruby]
# config/initializers/kaminari.rb
Kaminari.configure do |config|
config.page_method_name = :per_page_kaminari
end
[/cc]