Quick fix for: https://github.com/gregbell/active_admin/issues/708

comments.rb

# lib/active_admin/comments.rb

# Always redirect to the resource on show
before_filter :only => :show do
  flash[:notice] = flash[:notice].dup if flash[:notice]
  comment = ActiveAdmin::Comment.find(params[:id])
  resource_config = active_admin_config.namespace.resource_for(comment.resource.class)
  
  # I don't know why this is not working... yet.
  # redirect_to send(resource_config.route_instance_path, comment.resource)
  
  # so let's hack the planet
  redirect_to "#{url_for(:controller => comment.resource_type.pluralize.downcase)}/#{comment.resource_id}"
end