How to get ActiveAdmin to work with Strong Parameters?

Question

Update: this question was asked before there was a solution for it already in ActiveAdmin. As Joseph states, the ActiveAdmin documentation now contains this information,

Answer 1

The accepted answer did not work for me with resources defined in an engine, so I tracked down the original resource_params in inherited_resources/lib/inherited_resources/base_helpers.rb and came up with this solution which closer mimics that code, and which works with engines:

In config/initializers/active_admin.rb:

ActiveAdmin::ResourceController.class_eval do
  # Allow ActiveAdmin admins to freely mass-assign when using strong_parameters
  def resource_params
    [(params[resource_request_name] || params[resource_instance_name]).try(:permit!) || {}]
  end
end