ActiveAdmin: How to override index controller action: undefined method `base' for nil:NilClass

Question

I'm trying to override the index action of the ActiveAdmin controller for it to display results for the current_user instead of all results.

controller do
  def index
    @user_tasks = UserTask.where(:user_id => current_user.id).page(params[:page])
  end
end

When accessing ActiveAdmin, an exception in thrown:

ActionView::Template::Error (undefined method `base' for nil:NilClass):
    1: render renderer_for(:index)

I'm using rails 3.1 and the latest ActiveAdmin version. gem "activeadmin", :git => 'https://github.com/gregbell/active_admin.git'.

Answer 1

I don't know why but

controller do
    def index
      index! do |format|
        @user_tasks = UserTask.where(:user_id => current_user.id).page(params[:page])
        format.html
      end
    end
end

did the trick.

Answer 2

This is not required any more.

ActiveAdmin 0.4.4 now supports scoping queries without overriding this method. please see here: http://activeadmin.info/docs/2-resource-customization.html#scoping_the_queries

If your administrators have different access levels, you may sometimes want to scope what they have access to. Assuming your User model has the proper has_many relationships, you can simply scope the listings and finders like so:

 ActiveAdmin.register Post do
     scope_to :current_user

     # or if the association doesn't have the default name.
     # scope_to :current_user, :association_method => :blog_posts
 end